Convert.ToString 方法

定義

將指定的值轉換成其相等的字串表示。Converts the specified value to its equivalent string representation.

多載

ToString(Int32, Int32)

將 32 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 32-bit signed integer to its equivalent string representation in a specified base.

ToString(Decimal, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之十進位數字的值轉換為它的相等字串表示。Converts the value of the specified decimal number to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Double, IFormatProvider)

將指定之雙精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified double-precision floating-point number to its equivalent string representation.

ToString(Int16, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 16 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 16-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Int16, Int32)

將 16 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 16-bit signed integer to its equivalent string representation in a specified base.

ToString(Int32, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 32 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 32-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Int64, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 64 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 64-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(UInt64)

將指定之 64 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 64-bit unsigned integer to its equivalent string representation.

ToString(Object, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之物件的值轉換為它的相等字串表示。Converts the value of the specified object to its equivalent string representation using the specified culture-specific formatting information.

ToString(SByte, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 8 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 8-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Single, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之單精確度浮點數的值轉換為它的相等字串表示。Converts the value of the specified single-precision floating-point number to its equivalent string representation, using the specified culture-specific formatting information.

ToString(String, IFormatProvider)

傳回指定的字串執行個體,不執行實際的轉換。Returns the specified string instance; no actual conversion is performed.

ToString(UInt16, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 16 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 16-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(UInt32, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 32 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 32-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(UInt64, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 64 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 64-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(DateTime, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 DateTime 的值轉換為它的相等字串表示。Converts the value of the specified DateTime to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Int64, Int32)

將 64 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 64-bit signed integer to its equivalent string representation in a specified base.

ToString(Char, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 Unicode 字元的值轉換為它的相等字串表示。Converts the value of the specified Unicode character to its equivalent string representation, using the specified culture-specific formatting information.

ToString(UInt32)

將指定之 32 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 32-bit unsigned integer to its equivalent string representation.

ToString(Byte, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 8 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 8-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

ToString(Boolean)

將指定的布林值轉換為它的相等字串表示。Converts the specified Boolean value to its equivalent string representation.

ToString(Byte)

將指定之 8 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 8-bit unsigned integer to its equivalent string representation.

ToString(Char)

將指定之 Unicode 字元的值,轉換為它的相等字串表示。Converts the value of the specified Unicode character to its equivalent string representation.

ToString(DateTime)

將指定之 DateTime 的值轉換為它的相等字串表示。Converts the value of the specified DateTime to its equivalent string representation.

ToString(Double)

將指定之雙精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified double-precision floating-point number to its equivalent string representation.

ToString(Int16)

將指定之 16 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 16-bit signed integer to its equivalent string representation.

ToString(Int32)

將指定之 32 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 32-bit signed integer to its equivalent string representation.

ToString(Decimal)

將指定之十進位數字的值,轉換為它的相等字串表示。Converts the value of the specified decimal number to its equivalent string representation.

ToString(Object)

將指定之物件的值轉換為它的相等字串表示。Converts the value of the specified object to its equivalent string representation.

ToString(SByte)

將指定之 8 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 8-bit signed integer to its equivalent string representation.

ToString(Single)

將指定之單精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified single-precision floating-point number to its equivalent string representation.

ToString(String)

傳回指定的字串執行個體,不執行實際的轉換。Returns the specified string instance; no actual conversion is performed.

ToString(UInt16)

將指定之 16 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 16-bit unsigned integer to its equivalent string representation.

ToString(Byte, Int32)

將 8 位元不帶正負號整數的值,轉換為它在指定基底中的相等字串表示。Converts the value of an 8-bit unsigned integer to its equivalent string representation in a specified base.

ToString(Boolean, IFormatProvider)

將指定的布林值轉換為它的相等字串表示。Converts the specified Boolean value to its equivalent string representation.

ToString(Int64)

將指定之 64 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 64-bit signed integer to its equivalent string representation.

ToString(Int32, Int32)

將 32 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 32-bit signed integer to its equivalent string representation in a specified base.

public:
 static System::String ^ ToString(int value, int toBase);
public static string ToString (int value, int toBase);
static member ToString : int * int -> string
Public Shared Function ToString (value As Integer, toBase As Integer) As String

參數

value
Int32

要轉換的 32 位元帶正負號的整數。The 32-bit signed integer to convert.

toBase
Int32

傳回值的基底,必須是 2、8、10 或 16。The base of the return value, which must be 2, 8, 10, or 16.

傳回

String

在基底 valuetoBase 的字串表示。The string representation of value in base toBase.

例外狀況

toBase 不是 2、8、10 或 16。toBase is not 2, 8, 10, or 16.

範例

下列範例會將整數陣列中的每個元素轉換成其相等的二進位、十六進位、十進位和十六進位字串表示。The following example converts each element in an integer array to its equivalent binary, hexadecimal, decimal, and hexadecimal string representations.

int[] bases = { 2, 8, 10, 16};
int[] numbers = { Int32.MinValue, -19327543, -13621, -18, 12,
                             19142, Int32.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (int number in numbers)
   {
      Console.WriteLine("   {0,-15}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -2147483648      -->  0x10000000000000000000000000000000
//       -19327543        -->  0x11111110110110010001010111001001
//       -13621           -->  0x11111111111111111100101011001011
//       -18              -->  0x11111111111111111111111111101110
//       12               -->  0x1100
//       19142            -->  0x100101011000110
//       2147483647       -->  0x1111111111111111111111111111111
//    Base 8 conversion:
//       -2147483648      -->  0x20000000000
//       -19327543        -->  0x37666212711
//       -13621           -->  0x37777745313
//       -18              -->  0x37777777756
//       12               -->  0x14
//       19142            -->  0x45306
//       2147483647       -->  0x17777777777
//    Base 10 conversion:
//       -2147483648      -->  0x-2147483648
//       -19327543        -->  0x-19327543
//       -13621           -->  0x-13621
//       -18              -->  0x-18
//       12               -->  0x12
//       19142            -->  0x19142
//       2147483647       -->  0x2147483647
//    Base 16 conversion:
//       -2147483648      -->  0x80000000
//       -19327543        -->  0xfed915c9
//       -13621           -->  0xffffcacb
//       -18              -->  0xffffffee
//       12               -->  0xc
//       19142            -->  0x4ac6
//       2147483647       -->  0x7fffffff
Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Integer = { Int32.MinValue, -19327543, -13621, -18, 12, _
                             19142, Int32.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Integer In numbers
      Console.WriteLine("   {0,-15}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -2147483648      -->  0x10000000000000000000000000000000
'       -19327543        -->  0x11111110110110010001010111001001
'       -13621           -->  0x11111111111111111100101011001011
'       -18              -->  0x11111111111111111111111111101110
'       12               -->  0x1100
'       19142            -->  0x100101011000110
'       2147483647       -->  0x1111111111111111111111111111111
'    Base 8 conversion:
'       -2147483648      -->  0x20000000000
'       -19327543        -->  0x37666212711
'       -13621           -->  0x37777745313
'       -18              -->  0x37777777756
'       12               -->  0x14
'       19142            -->  0x45306
'       2147483647       -->  0x17777777777
'    Base 10 conversion:
'       -2147483648      -->  0x-2147483648
'       -19327543        -->  0x-19327543
'       -13621           -->  0x-13621
'       -18              -->  0x-18
'       12               -->  0x12
'       19142            -->  0x19142
'       2147483647       -->  0x2147483647
'    Base 16 conversion:
'       -2147483648      -->  0x80000000
'       -19327543        -->  0xfed915c9
'       -13621           -->  0xffffcacb
'       -18              -->  0xffffffee
'       12               -->  0xc
'       19142            -->  0x4ac6
'       2147483647       -->  0x7fffffff
let bases = [2; 8; 10; 16]
let numbers = [ Int32.MinValue; -19327543; -13621; -18; 12; 19142; Int32.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -15i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -2147483648      -->  0x10000000000000000000000000000000
//        -19327543        -->  0x11111110110110010001010111001001
//        -13621           -->  0x11111111111111111100101011001011
//        -18              -->  0x11111111111111111111111111101110
//         12              -->  0x1100
//         19142           -->  0x100101011000110
//         2147483647      -->  0x1111111111111111111111111111111
//     Base 8 conversion:
//        -2147483648      -->  0x20000000000
//        -19327543        -->  0x37666212711
//        -13621           -->  0x37777745313
//        -18              -->  0x37777777756
//         12              -->  0x14
//         19142           -->  0x45306
//         2147483647      -->  0x17777777777
//     Base 10 conversion:
//        -2147483648      -->  0x-2147483648
//        -19327543        -->  0x-19327543
//        -13621           -->  0x-13621
//        -18              -->  0x-18
//         12              -->  0x12
//         19142           -->  0x19142
//         2147483647      -->  0x2147483647
//     Base 16 conversion:
//        -2147483648      -->  0x80000000
//        -19327543        -->  0xfed915c9
//        -13621           -->  0xffffcacb
//        -18              -->  0xffffffee
//         12              -->  0xc
//         19142           -->  0x4ac6
//         2147483647      -->  0x7fffffff

備註

如果 value 是正數且 toBase 是2、8或16,則傳回的字串會使用正負號和量值標記法。If value is positive and toBase is 2, 8, or 16, the returned string uses sign-and-magnitude representation. 如果 value 是負數,且 toBase 是2、8或16,則傳回的字串會使用兩個補數標記法。If value is negative and toBase is 2, 8, or 16, the returned string uses two's complement representation. 這表示最高序位位元組 (位 31) 的高序位位會轉譯為符號位。This means that the high-order bit of the highest-order byte (bit 31) is interpreted as the sign bit. 如果 ToString(Int32, Int32) 呼叫方法來建立稍後將轉換回數位的字串,則應該呼叫採用類似數值標記法的對應方法來執行轉換。If the ToString(Int32, Int32) method is called to create a string that will later be converted back to a number, a corresponding method that assumes a similar numeric representation should be called to perform the conversion. 這類方法包括 Convert.ToInt32(String, Int32)Int32.Parse(String, NumberStyles)Such methods include Convert.ToInt32(String, Int32) and Int32.Parse(String, NumberStyles).

適用於

ToString(Decimal, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之十進位數字的值轉換為它的相等字串表示。Converts the value of the specified decimal number to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::Decimal value, IFormatProvider ^ provider);
public static string ToString (decimal value, IFormatProvider provider);
public static string ToString (decimal value, IFormatProvider? provider);
static member ToString : decimal * IFormatProvider -> string
Public Shared Function ToString (value As Decimal, provider As IFormatProvider) As String

參數

value
Decimal

要轉換的十進位數字。The decimal number to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將值陣列中的每個元素 Decimal ,轉換成其在四個不同文化特性中的相等字串表示。The following example converts each element in an array of Decimal values to its equivalent string representation in four different cultures.

// Define an array of numbers to display.
decimal[] numbers = { 1734231911290.16m, -17394.32921m,
                      3193.23m, 98012368321.684m };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (decimal number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    1734231911290.16:
//       en-US:     1734231911290.16
//       fr-FR:     1734231911290,16
//       ja-JP:     1734231911290.16
//       ru-RU:     1734231911290,16
//
//    -17394.32921:
//       en-US:         -17394.32921
//       fr-FR:         -17394,32921
//       ja-JP:         -17394.32921
//       ru-RU:         -17394,32921
//
//    3193.23:
//       en-US:              3193.23
//       fr-FR:              3193,23
//       ja-JP:              3193.23
//       ru-RU:              3193,23
//
//    98012368321.684:
//       en-US:      98012368321.684
//       fr-FR:      98012368321,684
//       ja-JP:      98012368321.684
//       ru-RU:      98012368321,684
' Define an array of numbers to display.
Dim numbers() As Decimal = { 1734231911290.16d, -17394.32921d, _
                             3193.23d, 98012368321.684d }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Decimal In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    1734231911290.16:
'       en-US:     1734231911290.16
'       fr-FR:     1734231911290,16
'       ja-JP:     1734231911290.16
'       ru-RU:     1734231911290,16
'    
'    -17394.32921:
'       en-US:         -17394.32921
'       fr-FR:         -17394,32921
'       ja-JP:         -17394.32921
'       ru-RU:         -17394,32921
'    
'    3193.23:
'       en-US:              3193.23
'       fr-FR:              3193,23
'       ja-JP:              3193.23
'       ru-RU:              3193,23
'    
'    98012368321.684:
'       en-US:      98012368321.684
'       fr-FR:      98012368321,684
'       ja-JP:      98012368321.684
'       ru-RU:      98012368321,684

備註

這項實行與相同 Decimal.ToString(IFormatProvider)This implementation is identical to Decimal.ToString(IFormatProvider).

適用於

ToString(Double, IFormatProvider)

將指定之雙精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified double-precision floating-point number to its equivalent string representation.

public:
 static System::String ^ ToString(double value, IFormatProvider ^ provider);
public static string ToString (double value, IFormatProvider provider);
public static string ToString (double value, IFormatProvider? provider);
static member ToString : double * IFormatProvider -> string
Public Shared Function ToString (value As Double, provider As IFormatProvider) As String

參數

value
Double

要轉換的雙精確度浮點數。The double-precision floating-point number to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將值陣列中的每個元素 Double ,轉換成其在四個不同文化特性中的相等字串表示。The following example converts each element in an array of Double values to its equivalent string representation in four different cultures.

// Define an array of numbers to display.
double[] numbers = { -1.5345e16, -123.4321, 19092.123, 1.1734231911290e16 };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (double number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16
' Define an array of numbers to display.
Dim numbers() As Double = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Double In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

備註

這項實行與 Double.ToString(IFormatProvider)This implementation is identical to Double.ToString(IFormatProvider)

適用於

ToString(Int16, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 16 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 16-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(short value, IFormatProvider ^ provider);
public static string ToString (short value, IFormatProvider provider);
public static string ToString (short value, IFormatProvider? provider);
static member ToString : int16 * IFormatProvider -> string
Public Shared Function ToString (value As Short, provider As IFormatProvider) As String

參數

value
Int16

要轉換的 16 位元帶正負號的整數。The 16-bit signed integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(Int16, IFormatProvider) 方法,將16位整數陣列中的每個專案轉換為其相等的字串表示。It then calls the ToString(Int16, IFormatProvider) method to convert each element in an array of 16-bit integers to its equivalent string representation. 轉換會使用不變的文化特性以及自訂 NumberFormatInfo 物件。The conversion uses the invariant culture as well as the custom NumberFormatInfo object.

short[] numbers = { Int16.MinValue, Int16.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (short number in numbers)
   Console.WriteLine("{0,-8}  -->  {1,8}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -32768    -->    ~32768
//       32767     -->     32767
Dim numbers() As Short = { Int16.MinValue, Int16.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Short In numbers
   Console.WriteLine("{0,-8}  -->  {1,8}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -32768    -->    ~32768
'       32767     -->     32767

備註

這項實行與相同 Int16.ToString(IFormatProvider)This implementation is identical to Int16.ToString(IFormatProvider).

適用於

ToString(Int16, Int32)

將 16 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 16-bit signed integer to its equivalent string representation in a specified base.

public:
 static System::String ^ ToString(short value, int toBase);
public static string ToString (short value, int toBase);
static member ToString : int16 * int -> string
Public Shared Function ToString (value As Short, toBase As Integer) As String

參數

value
Int16

要轉換的 16 位元帶正負號的整數。The 16-bit signed integer to convert.

toBase
Int32

傳回值的基底,必須是 2、8、10 或 16。The base of the return value, which must be 2, 8, 10, or 16.

傳回

String

在基底 valuetoBase 的字串表示。The string representation of value in base toBase.

例外狀況

toBase 不是 2、8、10 或 16。toBase is not 2, 8, 10, or 16.

範例

下列範例會將16位帶正負號之整數陣列中的每個專案轉換成其對等的二進位、八進位、十進位和十六進位字串表示。The following example converts each element in an array of 16-bit signed integers to its equivalent binary, octal, decimal, and hexadecimal string representations.

int[] bases = { 2, 8, 10, 16};
short[] numbers = { Int16.MinValue, -13621, -18, 12, 19142, Int16.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (short number in numbers)
   {
      Console.WriteLine("   {0,-8}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          -32768    -->  0x1000000000000000
//          -13621    -->  0x1100101011001011
//          -18       -->  0x1111111111101110
//          12        -->  0x1100
//          19142     -->  0x100101011000110
//          32767     -->  0x111111111111111
//       Base 8 conversion:
//          -32768    -->  0x100000
//          -13621    -->  0x145313
//          -18       -->  0x177756
//          12        -->  0x14
//          19142     -->  0x45306
//          32767     -->  0x77777
//       Base 10 conversion:
//          -32768    -->  0x-32768
//          -13621    -->  0x-13621
//          -18       -->  0x-18
//          12        -->  0x12
//          19142     -->  0x19142
//          32767     -->  0x32767
//       Base 16 conversion:
//          -32768    -->  0x8000
//          -13621    -->  0xcacb
//          -18       -->  0xffee
//          12        -->  0xc
//          19142     -->  0x4ac6
//          32767     -->  0x7fff
Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Short = { Int16.MinValue, -13621, -18, 12, 19142, _
                           Int16.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Short In numbers
      Console.WriteLine("   {0,-8}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          -32768    -->  0x1000000000000000
'          -13621    -->  0x1100101011001011
'          -18       -->  0x1111111111101110
'          12        -->  0x1100
'          19142     -->  0x100101011000110
'          32767     -->  0x111111111111111
'       Base 8 conversion:
'          -32768    -->  0x100000
'          -13621    -->  0x145313
'          -18       -->  0x177756
'          12        -->  0x14
'          19142     -->  0x45306
'          32767     -->  0x77777
'       Base 10 conversion:
'          -32768    -->  0x-32768
'          -13621    -->  0x-13621
'          -18       -->  0x-18
'          12        -->  0x12
'          19142     -->  0x19142
'          32767     -->  0x32767
'       Base 16 conversion:
'          -32768    -->  0x8000
'          -13621    -->  0xcacb
'          -18       -->  0xffee
'          12        -->  0xc
'          19142     -->  0x4ac6
'          32767     -->  0x7fff
let bases = [2; 8; 10; 16]
let numbers = [ Int16.MinValue; -13621s; -18s; 12s; 19142s; Int16.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -8i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -32768    -->  0x1000000000000000
//        -13621    -->  0x1100101011001011
//        -18       -->  0x1111111111101110
//         12       -->  0x1100
//         19142    -->  0x100101011000110
//         32767    -->  0x111111111111111
//     Base 8 conversion:
//        -32768    -->  0x100000
//        -13621    -->  0x145313
//        -18       -->  0x177756
//         12       -->  0x14
//         19142    -->  0x45306
//         32767    -->  0x77777
//     Base 10 conversion:
//        -32768    -->  0x-32768
//        -13621    -->  0x-13621
//        -18       -->  0x-18
//         12       -->  0x12
//         19142    -->  0x19142
//         32767    -->  0x32767
//     Base 16 conversion:
//        -32768    -->  0x8000
//        -13621    -->  0xcacb
//        -18       -->  0xffee
//         12       -->  0xc
//         19142    -->  0x4ac6
//         32767    -->  0x7fff

備註

如果 value 是正數且 toBase 是2、8或16,則傳回的字串會使用正負號和量值標記法。If value is positive and toBase is 2, 8, or 16, the returned string uses sign-and-magnitude representation. 如果 value 是負數,且 toBase 是2、8或16,則傳回的字串會使用兩個補數標記法。If value is negative and toBase is 2, 8, or 16, the returned string uses two's complement representation. 這表示高序位位元組 (位 15) 的高序位位會轉譯為符號位。This means that the high-order bit of the high-order byte (bit 15) is interpreted as the sign bit. 如果 ToString(Int16, Int32) 呼叫方法來建立稍後將轉換回數位的字串,則應該呼叫採用類似數值標記法的對應方法來執行轉換。If the ToString(Int16, Int32) method is called to create a string that will later be converted back to a number, a corresponding method that assumes a similar numeric representation should be called to perform the conversion. 這類方法包括 Convert.ToInt16(String, Int32)Int16.Parse(String, NumberStyles)Such methods include Convert.ToInt16(String, Int32) and Int16.Parse(String, NumberStyles).

適用於

ToString(Int32, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 32 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 32-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(int value, IFormatProvider ^ provider);
public static string ToString (int value, IFormatProvider provider);
public static string ToString (int value, IFormatProvider? provider);
static member ToString : int * IFormatProvider -> string
Public Shared Function ToString (value As Integer, provider As IFormatProvider) As String

參數

value
Int32

要轉換的 32 位元帶正負號的整數。The 32-bit signed integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(Int32, IFormatProvider) 方法,將整數陣列中的每個專案轉換為其相等的字串表示。It then calls the ToString(Int32, IFormatProvider) method to convert each element in an array of integers to its equivalent string representation. 轉換會使用不變的文化特性以及自訂 NumberFormatInfo 物件。The conversion uses the invariant culture as well as the custom NumberFormatInfo object.

int[] numbers = { Int32.MinValue, Int32.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (int number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -2147483648  -->  ~2147483648
//       2147483647  -->  2147483647
Dim numbers() As Integer = { Int32.MinValue, Int32.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Integer In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -2147483648  -->  ~2147483648
'       2147483647   -->  2147483647

備註

這項實行與相同 Int32.ToString(IFormatProvider)This implementation is identical to Int32.ToString(IFormatProvider).

適用於

ToString(Int64, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 64 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 64-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(long value, IFormatProvider ^ provider);
public static string ToString (long value, IFormatProvider provider);
public static string ToString (long value, IFormatProvider? provider);
static member ToString : int64 * IFormatProvider -> string
Public Shared Function ToString (value As Long, provider As IFormatProvider) As String

參數

value
Int64

要轉換的 64 位元帶正負號的整數。The 64-bit signed integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(Int64, IFormatProvider) 方法,以將長整數陣列中的每個元素轉換成其相等的字串表示。It then calls the ToString(Int64, IFormatProvider) method to convert each element in a long integer array to its equivalent string representation. 轉換會使用不變的文化特性以及自訂 NumberFormatInfo 物件。The conversion uses the invariant culture as well as the custom NumberFormatInfo object.

long[] numbers = { ((long) Int32.MinValue) * 2, ((long) Int32.MaxValue) * 2};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (long number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -4294967296  -->  ~4294967296
//       4294967294  -->  4294967294
Dim numbers() As Long = { CLng(Int32.MinValue) * 2, CLng(Int32.MaxValue) * 2 }
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Long In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -4294967296  -->  ~4294967296
'       4294967294   -->  4294967294

備註

這項實行與相同 Int64.ToString(IFormatProvider)This implementation is identical to Int64.ToString(IFormatProvider).

適用於

ToString(UInt64)

重要

此 API 不符合 CLS 規範。

將指定之 64 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 64-bit unsigned integer to its equivalent string representation.

public:
 static System::String ^ ToString(System::UInt64 value);
public static string ToString (ulong value);
[System.CLSCompliant(false)]
public static string ToString (ulong value);
static member ToString : uint64 -> string
[<System.CLSCompliant(false)>]
static member ToString : uint64 -> string
Public Shared Function ToString (value As ULong) As String

參數

value
UInt64

要轉換之 64 位元不帶正負號的整數。The 64-bit unsigned integer to convert.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會將不帶正負號的長整數陣列中的每個元素,轉換為其相等的字串表示。The following example converts each element in an unsigned long integer array to its equivalent string representation.

ulong[] numbers = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue };
string result;

foreach (ulong number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt64 value 0 to the String value 0.
//    Converted the UInt64 value 1031 to the String value 1031.
//    Converted the UInt64 value 189045 to the String value 189045.
//    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.
Dim numbers() As ULong = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue }
Dim result As String

For Each number As ULong In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt64 value 0 to the String value 0.
'    Converted the UInt64 value 1031 to the String value 1031.
'    Converted the UInt64 value 189045 to the String value 189045.
'    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

備註

這項實行與相同 UInt64.ToString()This implementation is identical to UInt64.ToString().

適用於

ToString(Object, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之物件的值轉換為它的相等字串表示。Converts the value of the specified object to its equivalent string representation using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::Object ^ value, IFormatProvider ^ provider);
public static string ToString (object value, IFormatProvider provider);
static member ToString : obj * IFormatProvider -> string
Public Shared Function ToString (value As Object, provider As IFormatProvider) As String

參數

value
Object

提供要轉換之值的物件,或是 nullAn object that supplies the value to convert, or null.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示;如果 Empty 是值為 value 的物件,則為 nullThe string representation of value, or Empty if value is an object whose value is null. 如果 valuenull,則方法會傳回 nullIf value is null, the method returns null.

範例

下列範例定義的 Temperature 類別會覆寫 Object.ToString 方法,但不會執行 IConvertible 介面。The following example defines a Temperature class that overrides the Object.ToString method but does not implement the IConvertible interface. 此範例會示範如何呼叫 Convert.ToString(Object, IFormatProvider) 方法,然後再呼叫 Temperature.ToString 方法。The example illustrates how calls to the Convert.ToString(Object, IFormatProvider) method, in turn, call the Temperature.ToString method.

using System;

public class Temperature
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   {
      get { return this.m_Temp; }
   }

   public decimal Kelvin
   {
      get { return this.m_Temp + 273.15m; }
   }

   public decimal Fahrenheit
   {
      get { return Math.Round((decimal) (this.m_Temp * 9 / 5 + 32), 2); }
   }

   public override string ToString()
   {
      return m_Temp.ToString("N2") + " °C";
   }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature(-40);
      Temperature freezing = new Temperature(0);
      Temperature boiling = new Temperature(100);

      Console.WriteLine(Convert.ToString(cold, null));
      Console.WriteLine(Convert.ToString(freezing, null));
      Console.WriteLine(Convert.ToString(boiling, null));
   }
}
// The example dosplays the following output:
//       -40.00 °C
//       0.00 °C
//       100.00 °C
Public Class Temperature 
   Private m_Temp As Decimal

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub
   
   Public ReadOnly Property Celsius() As Decimal
      Get
         Return Me.m_Temp
      End Get   
   End Property
   
   Public ReadOnly Property Kelvin() As Decimal
      Get
         Return Me.m_Temp + 273.15d   
      End Get
   End Property
   
   Public ReadOnly Property Fahrenheit() As Decimal
      Get
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get      
   End Property
   
   Public Overrides Function ToString() As String
      Return m_Temp.ToString("N2") & " °C"
   End Function
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)
      
      Console.WriteLine(Convert.ToString(cold, Nothing))
      Console.WriteLine(Convert.ToString(freezing, Nothing))
      Console.WriteLine(Convert.ToString(boiling, Nothing))
   End Sub
End Module
' The example displays the following output:
'       -40.00 °C
'       0.00 °C
'       100.00 °C

下列範例定義的類別會執行 Temperature 介面, IFormattable 但不會執行 IConvertible 介面。The following example defines a Temperature class that implements the IFormattable interface but does not implement the IConvertible interface. IFormattable.ToStringTemperature 值以攝氏、華氏或開氏的值表示,視格式字串而定。Its IFormattable.ToString implementation represents the Temperature value in Celsius, Fahrenheit, or Kelvin, depending on the format string. 此範例也會定義一個 TemperatureProvider 類別,該類別會 IFormatProvider 執行,並提供類別的實作為隨機產生的格式字串 IFormattable TemperatureThe example also defines a TemperatureProvider class that implements IFormatProvider and provides a randomly generated format string that is used by the IFormattable implementation of the Temperature class.

using System;

public class Temperature : IFormattable
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   { get { return this.m_Temp; } }

   public decimal Kelvin
   { get { return this.m_Temp + 273.15m; } }

   public decimal Fahrenheit
   {  get { return Math.Round(this.m_Temp * 9m / 5m + 32m, 2); } }

   public override String ToString()
   {
      return ToString("G", null);
   }

   public String ToString(String fmt, IFormatProvider provider)
   {
      TemperatureProvider formatter = null;
      if (provider != null)
         formatter = provider.GetFormat(typeof(TemperatureProvider))
                                       as TemperatureProvider;

      if (String.IsNullOrWhiteSpace(fmt)) {
         if (formatter != null)
            fmt = formatter.Format;
         else
            fmt = "G";
      }

      switch (fmt.ToUpper()) {
         case "G":
         case "C":
            return m_Temp.ToString("N2") + " °C";
         case "F":
            return Fahrenheit.ToString("N2") + " °F";
         case "K":
            return Kelvin.ToString("N2") + " K";
         default:
            throw new FormatException(String.Format("'{0}' is not a valid format specifier.", fmt));
      }
   }
}

public class TemperatureProvider : IFormatProvider
{
   private String[] fmtStrings = { "C", "G", "F", "K" };
   private Random rnd = new Random();

   public Object GetFormat(Type formatType)
   {
      return this;
   }

   public String Format
   { get { return fmtStrings[rnd.Next(0, fmtStrings.Length)]; } }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature (-40);
      Temperature freezing = new Temperature (0);
      Temperature boiling = new Temperature (100);

      TemperatureProvider tp = new TemperatureProvider();

      Console.WriteLine(Convert.ToString(cold, tp));
      Console.WriteLine(Convert.ToString(freezing, tp));
      Console.WriteLine(Convert.ToString(boiling, tp));
   }
}
// The example displays output like the following:
//       -40.00 °C
//       273.15 K
//       100.00 °C
Public Class Temperature : Implements IFormattable 
   Private m_Temp As Decimal 

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub 

   Public ReadOnly Property Celsius As Decimal 
      Get 
         Return Me.m_Temp
      End Get    
   End Property 

   Public ReadOnly Property Kelvin As Decimal 
      Get 
         Return Me.m_Temp + 273.15d   
      End Get 
   End Property 

   Public ReadOnly Property Fahrenheit As Decimal 
      Get 
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get       
   End Property 

   Public Overrides Function ToString() As String 
      Return ToString("G", Nothing) 
   End Function 
   
   Public Overloads Function ToString(fmt As String, 
                                      provider As IFormatProvider) As String _
                             Implements IFormattable.ToString
      Dim formatter As TemperatureProvider = Nothing
      If provider IsNot Nothing Then formatter = TryCast(provider.GetFormat(GetType(TemperatureProvider)),
                                                         TemperatureProvider)

      If String.IsNullOrWhiteSpace(fmt) Then
         If formatter IsNot Nothing Then
            fmt = formatter.Format
         Else
            fmt = "G"
         End If
      End If

      Select Case fmt.ToUpper()
         Case "G", "C"
            Return m_Temp.ToString("N2") & " °C" 
         Case "F"
            Return Fahrenheit.ToString("N2") + " °F"
         Case "K"
            Return Kelvin.ToString("N2") + " K"
         Case Else
            Throw New FormatException(String.Format("'{0}' is not a valid format specifier.", fmt))
      End Select
   End Function                             
End Class 

Public Class TemperatureProvider : Implements IFormatProvider
   Private fmtStrings() As String = { "C", "G", "F", "K" }
   Private rnd As New Random()
   
   Public Function GetFormat(formatType As Type) As Object _
                   Implements IFormatProvider.GetFormat 
      Return Me 
   End Function
   
   Public ReadOnly Property Format As String
      Get
         Return fmtStrings(rnd.Next(0, fmtStrings.Length))
      End Get
   End Property
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)

      Dim tp As New TemperatureProvider()
      
      Console.WriteLine(Convert.ToString(cold, tp))
      Console.WriteLine(Convert.ToString(freezing, tp))
      Console.WriteLine(Convert.ToString(boiling, tp))
   End Sub 
End Module 
' The example displays output like the following:
'       -40.00 °C
'       273.15 K
'       100.00 °C

備註

如果 value 參數會實作為 IConvertible 介面,則方法會呼叫的 IConvertible.ToString(IFormatProvider) 實作為 valueIf the value parameter implements the IConvertible interface, the method calls the IConvertible.ToString(IFormatProvider) implementation of value. 否則,如果 value 參數會實作為 IFormattable 介面,方法就會呼叫其 IFormattable.ToString(String, IFormatProvider) 實作為。Otherwise, if the value parameter implements the IFormattable interface, the method calls its IFormattable.ToString(String, IFormatProvider) implementation. 如果未 value 同時執行任何介面,則方法 value 會呼叫參數的 ToString() 方法,而且 provider 會忽略參數。If value implements neither interface, the method calls the value parameter's ToString() method, and the provider parameter is ignored.

provider如果參數會執行 value 或介面,則會使用參數 IConvertible IFormattableThe provider parameter is used if the value parameter implements the IConvertible or IFormattable interface. 參數最常見的用法 provider 是指定用於轉換的特定文化特性資訊 valueThe most common use of the provider parameter is to specify culture-specific information used in the conversion of value. 例如,如果 value 參數是負數十進位數,則 provider 參數可以提供有關負號和小數分隔符號所使用之標記法的特定文化特性資訊。For example, if the value parameter is a negative decimal number, the provider parameter can supply culture-specific information about the notation used for the negative sign and decimal separator. 下一節中的第二個範例說明不提供區分文化特性格式資訊的格式提供者。The second example in the next section illustrates a format provider that does not supply culture-sensitive formatting information.

適用於

ToString(SByte, IFormatProvider)

重要

此 API 不符合 CLS 規範。

使用指定之特定文化特性格式資訊,將指定之 8 位元帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 8-bit signed integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::SByte value, IFormatProvider ^ provider);
public static string ToString (sbyte value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static string ToString (sbyte value, IFormatProvider? provider);
[System.CLSCompliant(false)]
public static string ToString (sbyte value, IFormatProvider provider);
static member ToString : sbyte * IFormatProvider -> string
[<System.CLSCompliant(false)>]
static member ToString : sbyte * IFormatProvider -> string
Public Shared Function ToString (value As SByte, provider As IFormatProvider) As String

參數

value
SByte

要轉換的 8 位元帶正負號的整數。The 8-bit signed integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 Convert.ToString(SByte, IFormatProvider) 方法,將帶正負號的位元組陣列中的每個專案轉換為其相等的字串表示。It then calls the Convert.ToString(SByte, IFormatProvider) method to convert each element in signed byte array to its equivalent string representation. 轉換會使用不變的文化特性以及自訂 NumberFormatInfo 物件。The conversion uses the invariant culture as well as the custom NumberFormatInfo object.

sbyte[] numbers = { SByte.MinValue, -12, 17, SByte.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";
foreach (sbyte number in numbers)
   Console.WriteLine(Convert.ToString(number, nfi));
// The example displays the following output:
//       ~128
//       ~12
//       17
//       127
Dim numbers() As SByte = { SByte.MinValue, -12, 17, SByte.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"
For Each number As SByte In numbers
   Console.WriteLine(Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       ~128
'       ~12
'       17
'       127          

備註

這項實行與相同 SByte.ToString(IFormatProvider)This implementation is identical to SByte.ToString(IFormatProvider).

適用於

ToString(Single, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之單精確度浮點數的值轉換為它的相等字串表示。Converts the value of the specified single-precision floating-point number to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(float value, IFormatProvider ^ provider);
public static string ToString (float value, IFormatProvider provider);
public static string ToString (float value, IFormatProvider? provider);
static member ToString : single * IFormatProvider -> string
Public Shared Function ToString (value As Single, provider As IFormatProvider) As String

參數

value
Single

要轉換的單精確度浮點數。The single-precision floating-point number to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將值陣列中的每個元素 Single ,轉換成其在四個不同文化特性中的相等字串表示。The following example converts each element in an array of Single values to its equivalent string representation in four different cultures.

// Define an array of numbers to display.
float[] numbers = { -1.5345e16f, -123.4321f, 19092.123f, 1.1734231911290e16f };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (float number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16
' Define an array of numbers to display.
Dim numbers() As Single = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Single In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

備註

這項實行與相同 Single.ToString(IFormatProvider)This implementation is identical to Single.ToString(IFormatProvider).

適用於

ToString(String, IFormatProvider)

傳回指定的字串執行個體,不執行實際的轉換。Returns the specified string instance; no actual conversion is performed.

public:
 static System::String ^ ToString(System::String ^ value, IFormatProvider ^ provider);
public static string ToString (string value, IFormatProvider provider);
static member ToString : string * IFormatProvider -> string
Public Shared Function ToString (value As String, provider As IFormatProvider) As String

參數

value
String

要傳回的字串。The string to return.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information. 這個參數已忽略。This parameter is ignored.

傳回

String

value 會原封不動地傳回。value is returned unchanged.

範例

下列範例會 ToString 使用參數來呼叫方法 StringThe following example calls the ToString method with a String parameter. 方法 String 會在未參考物件的情況下傳回未修改的 IFormatProviderThe method returns the unmodified String without referencing the IFormatProvider object.

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/
// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/
' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

適用於

ToString(UInt16, IFormatProvider)

重要

此 API 不符合 CLS 規範。

使用指定之特定文化特性格式資訊,將指定之 16 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 16-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::UInt16 value, IFormatProvider ^ provider);
public static string ToString (ushort value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static string ToString (ushort value, IFormatProvider? provider);
[System.CLSCompliant(false)]
public static string ToString (ushort value, IFormatProvider provider);
static member ToString : uint16 * IFormatProvider -> string
[<System.CLSCompliant(false)>]
static member ToString : uint16 * IFormatProvider -> string
Public Shared Function ToString (value As UShort, provider As IFormatProvider) As String

參數

value
UInt16

要轉換之 16 位元不帶正負號的整數。The 16-bit unsigned integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(UInt16, IFormatProvider) 方法,將16位不帶正負號的整數值轉換為其相等的字串表示。It then calls the ToString(UInt16, IFormatProvider) method to convert a 16-bit unsigned integer value to its equivalent string representation. 轉換同時使用不變的文化特性和自訂 NumberFormatInfo 物件。The conversion uses both the invariant culture and the custom NumberFormatInfo object. 輸出指出不會使用此格式化資訊,因為根據預設,"G" 格式規範不包含正數值的正負號。The output indicates that this formatting information is not used, because by default the "G" format specifier does not include a positive sign with positive values.

ushort number = UInt16.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-6}  -->  {1,6}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       65535   -->   65535
Dim number As UShort = UInt16.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-6}  -->  {1,6}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       65535   -->   65535

備註

這項實行與相同 UInt16.ToString(IFormatProvider)This implementation is identical to UInt16.ToString(IFormatProvider).

適用於

ToString(UInt32, IFormatProvider)

重要

此 API 不符合 CLS 規範。

使用指定之特定文化特性格式資訊,將指定之 32 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 32-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::UInt32 value, IFormatProvider ^ provider);
public static string ToString (uint value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static string ToString (uint value, IFormatProvider? provider);
[System.CLSCompliant(false)]
public static string ToString (uint value, IFormatProvider provider);
static member ToString : uint32 * IFormatProvider -> string
[<System.CLSCompliant(false)>]
static member ToString : uint32 * IFormatProvider -> string
Public Shared Function ToString (value As UInteger, provider As IFormatProvider) As String

參數

value
UInt32

要轉換之 32 位元不帶正負號的整數。The 32-bit unsigned integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(UInt32, IFormatProvider) 方法,將不帶正負號的整數值轉換為其相等的字串表示。It then calls the ToString(UInt32, IFormatProvider) method to convert an unsigned integer value to its equivalent string representation. 轉換同時使用不變的文化特性和自訂 NumberFormatInfo 物件。The conversion uses both the invariant culture and the custom NumberFormatInfo object. 輸出指出不會使用此格式化資訊,因為根據預設,"G" 格式規範不包含正數值的正負號。The output indicates that this formatting information is not used, because by default the "G" format specifier does not include a positive sign with positive values.

uint number = UInt32.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-8}  -->  {1,8}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       4294967295  -->  4294967295
Dim number As UInteger = UInt32.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-8}  -->  {1,8}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       4294967295  -->  4294967295

備註

這項實行與相同 UInt32.ToString(IFormatProvider)This implementation is identical to UInt32.ToString(IFormatProvider).

適用於

ToString(UInt64, IFormatProvider)

重要

此 API 不符合 CLS 規範。

使用指定之特定文化特性格式資訊,將指定之 64 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 64-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::UInt64 value, IFormatProvider ^ provider);
public static string ToString (ulong value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static string ToString (ulong value, IFormatProvider? provider);
[System.CLSCompliant(false)]
public static string ToString (ulong value, IFormatProvider provider);
static member ToString : uint64 * IFormatProvider -> string
[<System.CLSCompliant(false)>]
static member ToString : uint64 * IFormatProvider -> string
Public Shared Function ToString (value As ULong, provider As IFormatProvider) As String

參數

value
UInt64

要轉換之 64 位元不帶正負號的整數。The 64-bit unsigned integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會定義自訂 NumberFormatInfo 類別,其會將其負號定義為字串 "~",並將其正負號定義為字串 "!"。The following example defines a custom NumberFormatInfo class that defines its negative sign as the string "~" and its positive sign as the string "!". 然後,它會呼叫 ToString(UInt64, IFormatProvider) 方法,將不帶正負號的長整數值轉換為其相等的字串表示。It then calls the ToString(UInt64, IFormatProvider) method to convert an unsigned long integer value to its equivalent string representation. 轉換同時使用不變的文化特性和自訂 NumberFormatInfo 物件。The conversion uses both the invariant culture and the custom NumberFormatInfo object. 輸出指出不會使用此格式化資訊,因為根據預設,"G" 格式規範不包含正數值的正負號。The output indicates that this formatting information is not used, because by default the "G" format specifier does not include a positive sign with positive values.

ulong number = UInt64.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-12}  -->  {1,12}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//    18446744073709551615  -->  18446744073709551615
Dim number As ULong = UInt64.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-12}  -->  {1,12}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'    18446744073709551615  -->  18446744073709551615

備註

這項實行與相同 UInt64.ToString(IFormatProvider)This implementation is identical to UInt64.ToString(IFormatProvider).

適用於

ToString(DateTime, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 DateTime 的值轉換為它的相等字串表示。Converts the value of the specified DateTime to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(DateTime value, IFormatProvider ^ provider);
public static string ToString (DateTime value, IFormatProvider provider);
public static string ToString (DateTime value, IFormatProvider? provider);
static member ToString : DateTime * IFormatProvider -> string
Public Shared Function ToString (value As DateTime, provider As IFormatProvider) As String

參數

value
DateTime

要轉換的日期和時間值。The date and time value to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將 DateTime 值轉換為其在八種不同文化特性中的相等字串表示。The following example converts a DateTime value to its equivalent string representation in eight different cultures.

// Specify the date to be formatted using various cultures.
DateTime tDate = new DateTime(2010, 4, 15, 20, 30, 40, 333);
// Specify the cultures.
string[] cultureNames = { "en-US", "es-AR", "fr-FR", "hi-IN",
                          "ja-JP", "nl-NL", "ru-RU", "ur-PK" };

Console.WriteLine("Converting the date {0}: ",
                  Convert.ToString(tDate,
                          System.Globalization.CultureInfo.InvariantCulture));

foreach (string cultureName in cultureNames)
{
   System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
   string dateString = Convert.ToString(tDate, culture);
   Console.WriteLine("   {0}:  {1,-12}",
                     culture.Name, dateString);
}
// The example displays the following output:
//       Converting the date 04/15/2010 20:30:40:
//          en-US:  4/15/2010 8:30:40 PM
//          es-AR:  15/04/2010 08:30:40 p.m.
//          fr-FR:  15/04/2010 20:30:40
//          hi-IN:  15-04-2010 20:30:40
//          ja-JP:  2010/04/15 20:30:40
//          nl-NL:  15-4-2010 20:30:40
//          ru-RU:  15.04.2010 20:30:40
//          ur-PK:  15/04/2010 8:30:40 PM
' Specify the date to be formatted using various cultures.
Dim tDate As New Date(2010, 4, 15, 20, 30, 40, 333)
' Specify the cultures.
Dim cultureNames() As String = { "en-US", "es-AR", "fr-FR", "hi-IN", _
                                 "ja-JP", "nl-NL", "ru-RU", "ur-PK" }

Console.WriteLine("Converting the date {0}: ", _
                  Convert.ToString(tDate, _
                          System.Globalization.CultureInfo.InvariantCulture))

For Each cultureName As String In CultureNames
   Dim culture As New System.Globalization.CultureInfo(cultureName)
   Dim dateString As String = Convert.ToString(tDate, culture)
   Console.WriteLine("   {0}:  {1,-12}", _
                     culture.Name, dateString)
Next             
' The example displays the following output:
'       Converting the date 04/15/2010 20:30:40:
'          en-US:  4/15/2010 8:30:40 PM
'          es-AR:  15/04/2010 08:30:40 p.m.
'          fr-FR:  15/04/2010 20:30:40
'          hi-IN:  15-04-2010 20:30:40
'          ja-JP:  2010/04/15 20:30:40
'          nl-NL:  15-4-2010 20:30:40
'          ru-RU:  15.04.2010 20:30:40
'          ur-PK:  15/04/2010 8:30:40 PM      

備註

這項實行與相同 DateTime.ToString(IFormatProvider)This implementation is identical to DateTime.ToString(IFormatProvider).

適用於

ToString(Int64, Int32)

將 64 位元帶正負號整數的值,轉換為它在指定之基底中的相等字串表示。Converts the value of a 64-bit signed integer to its equivalent string representation in a specified base.

public:
 static System::String ^ ToString(long value, int toBase);
public static string ToString (long value, int toBase);
static member ToString : int64 * int -> string
Public Shared Function ToString (value As Long, toBase As Integer) As String

參數

value
Int64

要轉換的 64 位元帶正負號的整數。The 64-bit signed integer to convert.

toBase
Int32

傳回值的基底,必須是 2、8、10 或 16。The base of the return value, which must be 2, 8, 10, or 16.

傳回

String

在基底 valuetoBase 的字串表示。The string representation of value in base toBase.

例外狀況

toBase 不是 2、8、10 或 16。toBase is not 2, 8, 10, or 16.

範例

下列範例會將長整數陣列中的每個元素轉換為其相等的二進位、十六進位、十進位和十六進位字串表示。The following example converts each element in a long integer array to its equivalent binary, hexadecimal, decimal, and hexadecimal string representations.

int[] bases = { 2, 8, 10, 16};
long[] numbers = { Int64.MinValue, -193275430, -13621, -18, 12,
                   1914206117, Int64.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (long number in numbers)
   {
      Console.WriteLine("   {0,-23}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//       12                       -->  0x1100
//       1914206117               -->  0x1110010000110000111011110100101
//       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
//    Base 8 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000
//       -193275430               -->  0x1777777777776436554732
//       -13621                   -->  0x1777777777777777745313
//       -18                      -->  0x1777777777777777777756
//       12                       -->  0x14
//       1914206117               -->  0x16206073645
//       9223372036854775807      -->  0x777777777777777777777
//    Base 10 conversion:
//       -9223372036854775808     -->  0x-9223372036854775808
//       -193275430               -->  0x-193275430
//       -13621                   -->  0x-13621
//       -18                      -->  0x-18
//       12                       -->  0x12
//       1914206117               -->  0x1914206117
//       9223372036854775807      -->  0x9223372036854775807
//    Base 16 conversion:
//       -9223372036854775808     -->  0x8000000000000000
//       -193275430               -->  0xfffffffff47ad9da
//       -13621                   -->  0xffffffffffffcacb
//       -18                      -->  0xffffffffffffffee
//       12                       -->  0xc
//       1914206117               -->  0x721877a5
//       9223372036854775807      -->  0x7fffffffffffffff
Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Long = { Int64.MinValue, -193275430, -13621, -18, 12, _
                             1914206117, Int64.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Long In numbers
      Console.WriteLine("   {0,-23}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
'       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
'       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
'       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
'       12                       -->  0x1100
'       1914206117               -->  0x1110010000110000111011110100101
'       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
'    Base 8 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000
'       -193275430               -->  0x1777777777776436554732
'       -13621                   -->  0x1777777777777777745313
'       -18                      -->  0x1777777777777777777756
'       12                       -->  0x14
'       1914206117               -->  0x16206073645
'       9223372036854775807      -->  0x777777777777777777777
'    Base 10 conversion:
'       -9223372036854775808     -->  0x-9223372036854775808
'       -193275430               -->  0x-193275430
'       -13621                   -->  0x-13621
'       -18                      -->  0x-18
'       12                       -->  0x12
'       1914206117               -->  0x1914206117
'       9223372036854775807      -->  0x9223372036854775807
'    Base 16 conversion:
'       -9223372036854775808     -->  0x8000000000000000
'       -193275430               -->  0xfffffffff47ad9da
'       -13621                   -->  0xffffffffffffcacb
'       -18                      -->  0xffffffffffffffee
'       12                       -->  0xc
'       1914206117               -->  0x721877a5
'       9223372036854775807      -->  0x7fffffffffffffff
let bases = [2; 8; 10; 16]
let numbers = [ Int64.MinValue; -193275430L; -13621L; -18L; 12L; 1914206117L; Int64.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -23i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//        -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//        -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//        -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//         12                      -->  0x1100
//         1914206117              -->  0x1110010000110000111011110100101
//         9223372036854775807     -->  0x111111111111111111111111111111111111111111111111111111111111111
//     Base 8 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000
//        -193275430               -->  0x1777777777776436554732
//        -13621                   -->  0x1777777777777777745313
//        -18                      -->  0x1777777777777777777756
//         12                      -->  0x14
//         1914206117              -->  0x16206073645
//         9223372036854775807     -->  0x777777777777777777777
//     Base 10 conversion:
//        -9223372036854775808     -->  0x-9223372036854775808
//        -193275430               -->  0x-193275430
//        -13621                   -->  0x-13621
//        -18                      -->  0x-18
//         12                      -->  0x12
//         1914206117              -->  0x1914206117
//         9223372036854775807     -->  0x9223372036854775807
//     Base 16 conversion:
//        -9223372036854775808     -->  0x8000000000000000
//        -193275430               -->  0xfffffffff47ad9da
//        -13621                   -->  0xffffffffffffcacb
//        -18                      -->  0xffffffffffffffee
//         12                      -->  0xc
//         1914206117              -->  0x721877a5
//         9223372036854775807     -->  0x7fffffffffffffff

備註

如果 value 是正數且 toBase 不是10,則傳回的字串會使用正負號和量值標記法。If value is positive and toBase is not 10, the returned string uses sign-and-magnitude representation. 如果 value 是負數且不 toBase 是10,則傳回的字串會使用兩個補數標記法。If value is negative and toBase is not 10, the returned string uses two's complement representation. 這表示最高序位位元組 (位 63) 的高序位位會轉譯為符號位。This means that the high-order bit of the highest-order byte (bit 63) is interpreted as the sign bit. 如果 ToString(Int64, Int32) 呼叫方法來建立稍後將轉換回數位的字串,則應該呼叫採用類似數值標記法的對應方法來執行轉換。If the ToString(Int64, Int32) method is called to create a string that will later be converted back to a number, a corresponding method that assumes a similar numeric representation should be called to perform the conversion. 這類方法包括 Convert.ToInt64(String, Int32)Int64.Parse(String, NumberStyles)Such methods include Convert.ToInt64(String, Int32) and Int64.Parse(String, NumberStyles).

適用於

ToString(Char, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 Unicode 字元的值轉換為它的相等字串表示。Converts the value of the specified Unicode character to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(char value, IFormatProvider ^ provider);
public static string ToString (char value, IFormatProvider provider);
public static string ToString (char value, IFormatProvider? provider);
static member ToString : char * IFormatProvider -> string
Public Shared Function ToString (value As Char, provider As IFormatProvider) As String

參數

value
Char

要轉換的 Unicode 字元。The Unicode character to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information. 這個參數已忽略。This parameter is ignored.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例 Char 會使用方法將值轉換成 String ToString ,並使用 IFormatProvider 會顯示其所呼叫之格式提供者類型的物件。The following example converts a Char value to a String with the ToString method, using an IFormatProvider object that displays the type of the format provider for which it is called. 此範例顯示 IFormatProvider 未參考該物件。The example shows that the IFormatProvider object is not referenced.

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/
// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/
' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

備註

這項實行與相同 Char.ToString()This implementation is identical to Char.ToString(). provider參數會被忽略。The provider parameter is ignored.

適用於

ToString(UInt32)

重要

此 API 不符合 CLS 規範。

將指定之 32 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 32-bit unsigned integer to its equivalent string representation.

public:
 static System::String ^ ToString(System::UInt32 value);
public static string ToString (uint value);
[System.CLSCompliant(false)]
public static string ToString (uint value);
static member ToString : uint32 -> string
[<System.CLSCompliant(false)>]
static member ToString : uint32 -> string
Public Shared Function ToString (value As UInteger) As String

參數

value
UInt32

要轉換之 32 位元不帶正負號的整數。The 32-bit unsigned integer to convert.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會將不帶正負號的整數陣列中的每個專案轉換為其相等的字串表示。The following example converts each element in an unsigned integer array to its equivalent string representation.

uint[] numbers = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue };
string result;

foreach (uint number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the String value 0.
//    Converted the UInt32 value 103 to the String value 103.
//    Converted the UInt32 value 1045 to the String value 1045.
//    Converted the UInt32 value 119543 to the String value 119543.
//    Converted the UInt32 value 4294967295 to the String value 4294967295.
Dim numbers() As UInteger = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue }
Dim result As String

For Each number As UInteger In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt32 value 0 to the String value 0.
'    Converted the UInt32 value 103 to the String value 103.
'    Converted the UInt32 value 1045 to the String value 1045.
'    Converted the UInt32 value 119543 to the String value 119543.
'    Converted the UInt32 value 4294967295 to the String value 4294967295.

備註

這項實行與相同 UInt32.ToString()This implementation is identical to UInt32.ToString().

適用於

ToString(Byte, IFormatProvider)

使用指定之特定文化特性格式資訊,將指定之 8 位元不帶正負號的整數的值轉換為它的相等字串表示。Converts the value of the specified 8-bit unsigned integer to its equivalent string representation, using the specified culture-specific formatting information.

public:
 static System::String ^ ToString(System::Byte value, IFormatProvider ^ provider);
public static string ToString (byte value, IFormatProvider provider);
public static string ToString (byte value, IFormatProvider? provider);
static member ToString : byte * IFormatProvider -> string
Public Shared Function ToString (value As Byte, provider As IFormatProvider) As String

參數

value
Byte

要轉換之 8 位元不帶正負號的整數。The 8-bit unsigned integer to convert.

provider
IFormatProvider

物件,提供特定文化特性格式資訊。An object that supplies culture-specific formatting information.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會使用 en-us 和 fr-fr 文化特性的格式化慣例,將不帶正負號的位元組陣列中的每個專案轉換為其相等的字串表示。The following example converts each element in an unsigned byte array to its equivalent string representation using the formatting conventions of the en-US and fr-FR cultures. 因為 "G" 規範預設只會輸出位元組值的字串標記法中的十進位數,所以 provider 參數不會影響傳回字串的格式。Because the "G" specifier by default outputs only decimal digits in a byte value's string representation, the provider parameter does not affect the formatting of the returned string.

byte[] numbers = { 12, 100, Byte.MaxValue };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR" };

foreach (byte number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//       12:
//          en-US:                   12
//          fr-FR:                   12
//
//       100:
//          en-US:                  100
//          fr-FR:                  100
//
//       255:
//          en-US:                  255
//          fr-FR:                  255
' Define an array of numbers to display.
Dim numbers() As Byte = { 12, 100, Byte.MaxValue }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR" }

For Each number As Byte In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'       12:
'          en-US:                   12
'          fr-FR:                   12
'       
'       100:
'          en-US:                  100
'          fr-FR:                  100
'       
'       255:
'          en-US:                  255
'          fr-FR:                  255      

備註

這項實行與相同 Byte.ToStringThis implementation is identical to Byte.ToString.

適用於

ToString(Boolean)

將指定的布林值轉換為它的相等字串表示。Converts the specified Boolean value to its equivalent string representation.

public:
 static System::String ^ ToString(bool value);
public static string ToString (bool value);
static member ToString : bool -> string
Public Shared Function ToString (value As Boolean) As String

參數

value
Boolean

要轉換的布林值。The Boolean value to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例說明 Boolean 如何使用將轉換成 String ToStringThe following example illustrates the conversion of a Boolean to a String, using ToString. 它也會說明轉換所傳回的字串等於 Boolean.TrueStringBoolean.FalseStringIt also illustrates that the string returned by the conversion equals either Boolean.TrueString or Boolean.FalseString.

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine(Convert.ToString(falseFlag));
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString));
Console.WriteLine(Convert.ToString(trueFlag));
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString));
// The example displays the following output:
//       False
//       True
//       True
//       True
Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine(Convert.ToString(falseFlag))
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString))
Console.WriteLine(Convert.ToString(trueFlag))
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString))
' The example displays the following output:
'       False
'       True
'       True
'       True      
let falseFlag = false
let trueFlag = true

Console.WriteLine (Convert.ToString falseFlag)
Console.WriteLine (Convert.ToString falseFlag=Boolean.FalseString)
Console.WriteLine (Convert.ToString trueFlag)
Console.WriteLine (Convert.ToString trueFlag=Boolean.TrueString)
// The example displays the following output:
//       False
//       True
//       True
//       True

備註

這項實行與相同 Boolean.ToStringThis implementation is identical to Boolean.ToString. 它會 Boolean.TrueString 傳回 true 值和 Boolean.FalseString false 值。It returns Boolean.TrueString for true values and Boolean.FalseString for false values.

適用於

ToString(Byte)

將指定之 8 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 8-bit unsigned integer to its equivalent string representation.

public:
 static System::String ^ ToString(System::Byte value);
public static string ToString (byte value);
static member ToString : byte -> string
Public Shared Function ToString (value As Byte) As String

參數

value
Byte

要轉換之 8 位元不帶正負號的整數。The 8-bit unsigned integer to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將陣列中的每個值轉換 Byte 成字串。The following example converts each value in a Byte array to a string.

using System;

public class Example
{
   public static void Main()
   {
      byte[] values = { Byte.MinValue, 12, 100, 179, Byte.MaxValue } ;

      foreach (var value in values)
         Console.WriteLine("{0,3} ({1}) --> {2}", value,
                           value.GetType().Name,
                           Convert.ToString(value));
   }
}
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255
Public Module Example
   Public Sub Main()
      Dim values() As Byte = { Byte.MinValue, 12, 100, 179, Byte.MaxValue }

      For Each value In values
         Console.WriteLine("{0,3} ({1}) --> {2}", value, 
                           value.GetType().Name, 
                           Convert.ToString(value))
      Next                           
   End Sub
End Module
' The example displays the following output:
'       0 (Byte) --> 0
'      12 (Byte) --> 12
'     100 (Byte) --> 100
'     179 (Byte) --> 179
'     255 (Byte) --> 255
let values = [ Byte.MinValue; 12uy; 100uy; 179uy; Byte.MaxValue ]
for value in values do
    printfn "% 4i (%s) --> %s" value (value.GetType().Name) (Convert.ToString value)
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

備註

這項實行與相同 Byte.ToString()This implementation is identical to Byte.ToString().

適用於

ToString(Char)

將指定之 Unicode 字元的值,轉換為它的相等字串表示。Converts the value of the specified Unicode character to its equivalent string representation.

public:
 static System::String ^ ToString(char value);
public static string ToString (char value);
static member ToString : char -> string
Public Shared Function ToString (value As Char) As String

參數

value
Char

要轉換的 Unicode 字元。The Unicode character to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將轉換 CharStringThe following example converts a Char to a String.

public:
   void ConvertStringChar( String^ stringVal )
   {
      Char charVal = 'a';
      
      // A String must be one character long to convert to char.
      try
      {
         charVal = System::Convert::ToChar( stringVal );
         System::Console::WriteLine( " {0} as a char is {1}",
            stringVal, charVal );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine(
            "The String is longer than one character." );
      }
      catch ( System::ArgumentNullException^ ) 
      {
         System::Console::WriteLine( "The String is 0." );
      }
      
      // A char to String conversion will always succeed.
      stringVal = System::Convert::ToString( charVal );
      System::Console::WriteLine( "The character as a String is {0}",
         stringVal );
   }
public void ConvertStringChar(string stringVal) {
    char charVal = 'a';

    // A string must be one character long to convert to char.
    try {
        charVal = System.Convert.ToChar(stringVal);
        System.Console.WriteLine("{0} as a char is {1}",
            stringVal, charVal);
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is longer than one character.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine("The string is null.");
    }

    // A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal);
    System.Console.WriteLine("The character as a string is {0}",
            stringVal);
}
Public Sub ConvertStringChar(ByVal stringVal As String)
    Dim charVal As Char = "a"c

    ' A string must be one character long to convert to char.
    Try
        charVal = System.Convert.ToChar(stringVal)
        System.Console.WriteLine("{0} as a char is {1}", _
                                  stringVal, charVal)
    Catch exception As System.FormatException
        System.Console.WriteLine( _
         "The string is longer than one character.")
    Catch exception As System.ArgumentNullException
        System.Console.WriteLine("The string is null.")
    End Try

    ' A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal)
    System.Console.WriteLine("The character as a string is {0}", _
                              stringVal)
End Sub

備註

這項實行與相同 Char.ToStringThis implementation is identical to Char.ToString.

適用於

ToString(DateTime)

將指定之 DateTime 的值轉換為它的相等字串表示。Converts the value of the specified DateTime to its equivalent string representation.

public:
 static System::String ^ ToString(DateTime value);
public static string ToString (DateTime value);
static member ToString : DateTime -> string
Public Shared Function ToString (value As DateTime) As String

參數

value
DateTime

要轉換的日期和時間值。The date and time value to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將值陣列中的每個元素轉換 DateTimeString 值。The following example converts each element in an array of a DateTime value to a String value.

DateTime[] dates = { new DateTime(2009, 7, 14),
                     new DateTime(1, 1, 1, 18, 32, 0),
                     new DateTime(2009, 2, 12, 7, 16, 0) };
string result;

foreach (DateTime dateValue in dates)
{
   result = Convert.ToString(dateValue);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        dateValue.GetType().Name, dateValue,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
//    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
//    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.
Dim dates() As Date = { #07/14/2009#, #6:32PM#, #02/12/2009 7:16AM#}
Dim result As String

For Each dateValue As Date In dates
   result = Convert.ToString(dateValue)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        dateValue.GetType().Name, dateValue, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
'    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
'    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

備註

這項實行與相同 DateTime.ToString()This implementation is identical to DateTime.ToString(). 它會使用目前文化特性的格式化慣例和 "G" 格式規範,將值轉換成 DateTime 其字串表示。It uses the formatting conventions of the current culture and the "G" format specifier to convert a DateTime value to its string representation.

適用於

ToString(Double)

將指定之雙精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified double-precision floating-point number to its equivalent string representation.

public:
 static System::String ^ ToString(double value);
public static string ToString (double value);
static member ToString : double -> string
Public Shared Function ToString (value As Double) As String

參數

value
Double

要轉換的雙精確度浮點數。The double-precision floating-point number to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將轉換 DoubleStringThe following example converts a Double to a String.

public:
   void ConvertDoubleString( double doubleVal )
   {
      String^ stringVal;
      
      // A conversion from Double to String cannot overflow.
      stringVal = System::Convert::ToString( doubleVal );
      System::Console::WriteLine( " {0} as a String is: {1}",
         doubleVal, stringVal );
      try
      {
         doubleVal = System::Convert::ToDouble( stringVal );
         System::Console::WriteLine( " {0} as a double is: {1}",
         stringVal, doubleVal );
      }
      catch ( System::OverflowException^ ) 
      {
         System::Console::WriteLine( "Conversion from String-to-double overflowed." );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine( "The String was not formatted as a double." );
      }
      catch ( System::ArgumentException^ ) 
      {
         System::Console::WriteLine( "The String pointed to null." );
      }
   }
public void ConvertDoubleString(double doubleVal) {
    
    string	stringVal;

    // A conversion from Double to string cannot overflow.
    stringVal = System.Convert.ToString(doubleVal);
    System.Console.WriteLine("{0} as a string is: {1}",
        doubleVal, stringVal);

    try {
        doubleVal = System.Convert.ToDouble(stringVal);
        System.Console.WriteLine("{0} as a double is: {1}",
            stringVal, doubleVal);
    }
    catch (System.OverflowException) {
        System.Console.WriteLine(
            "Conversion from string-to-double overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string was not formatted as a double.");
    }
    catch (System.ArgumentException) {
        System.Console.WriteLine(
            "The string pointed to null.");
    }
}
Public Sub ConvertDoubleString(ByVal doubleVal As Double)

    Dim stringVal As String

    ' A conversion from Double to String cannot overflow.       
    stringVal = System.Convert.ToString(doubleVal)
    System.Console.WriteLine("{0} as a String is: {1}", _
                              doubleVal, stringVal)

    Try
        doubleVal = System.Convert.ToDouble(stringVal)
        System.Console.WriteLine("{0} as a Double is: {1}", _
                                  stringVal, doubleVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in String-to-Double conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a Double.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

End Sub

備註

這項實行與相同 Double.ToString()This implementation is identical to Double.ToString().

適用於

ToString(Int16)

將指定之 16 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 16-bit signed integer to its equivalent string representation.

public:
 static System::String ^ ToString(short value);
public static string ToString (short value);
static member ToString : int16 -> string
Public Shared Function ToString (value As Short) As String

參數

value
Int16

要轉換的 16 位元帶正負號的整數。The 16-bit signed integer to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將16位整數陣列中的每個元素轉換成其相等的字串表示。The following example converts each element in an array of 16-bit integers to its equivalent string representation.

short[] numbers = { Int16.MinValue, -138, 0, 19, Int16.MaxValue };
string result;

foreach (short number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Int16 value -32768 to the String value -32768.
//    Converted the Int16 value -138 to the String value -138.
//    Converted the Int16 value 0 to the String value 0.
//    Converted the Int16 value 19 to the String value 19.
//    Converted the Int16 value 32767 to the String value 32767.
Dim numbers() As Short = { Int16.MinValue, -138, 0, 19, Int16.MaxValue }
Dim result As String

For Each number As Short In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next     
' The example displays the following output:
'    Converted the Int16 value -32768 to the String value -32768.
'    Converted the Int16 value -138 to the String value -138.
'    Converted the Int16 value 0 to the String value 0.
'    Converted the Int16 value 19 to the String value 19.
'    Converted the Int16 value 32767 to the String value 32767.

備註

這項實行與相同 Int16.ToString()This implementation is identical to Int16.ToString().

適用於

ToString(Int32)

將指定之 32 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 32-bit signed integer to its equivalent string representation.

public:
 static System::String ^ ToString(int value);
public static string ToString (int value);
static member ToString : int -> string
Public Shared Function ToString (value As Integer) As String

參數

value
Int32

要轉換的 32 位元帶正負號的整數。The 32-bit signed integer to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會比較 ToString(Int32) 方法與 ToString(UInt16, IFormatProvider) 方法。The following example compares the ToString(Int32) method with the ToString(UInt16, IFormatProvider) method. 它會定義一個自訂 NumberFormatInfo 物件,該物件會使用字串 "減號" 來代表負號。It defines a custom NumberFormatInfo object that uses the sting "minus" to represent the negative sign. 它會使用預設格式 (目前文化特性的格式設定慣例) 和自訂格式提供者,將整數陣列中的每個元素轉換為其相等的字串表示。It converts each element in an integer array to its equivalent string representation using default formatting (the formatting conventions of the current culture) and the custom format provider.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set its NegativeSigns
      // property to use for integer formatting.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.NegativeSign = "minus ";

      int[] values = { -20, 0, 100 };

      Console.WriteLine("{0,-8} --> {1,10} {2,10}\n", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom");
      foreach (int value in values)
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider));
      // The example displays output like the following:
      //       Value    -->      en-US     Custom
      //
      //       -20      -->        -20   minus 20
      //       0        -->          0          0
      //       100      -->        100        100
Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set its NegativeSigns
      ' property to use for integer formatting.
      Dim provider As New NumberFormatInfo()
      provider.NegativeSign = "minus "

      Dim values() As Integer = { -20, 0, 100 }

      Console.WriteLine("{0,-8} --> {1,10} {2,10}", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom")
      Console.WriteLine()
      For Each value As Integer In values
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider))
      Next
   End Sub
End Module
' The example displays output like the following:
'       Value    -->      en-US     Custom
'
'       -20      -->        -20   minus 20
'       0        -->          0          0
'       100      -->        100        100

備註

這項實行與相同 Int32.ToString()This implementation is identical to Int32.ToString(). 它會 value 使用目前線程文化特性的格式化慣例來格式化。It formats value by using the formatting conventions of the current thread culture.

適用於

ToString(Decimal)

將指定之十進位數字的值,轉換為它的相等字串表示。Converts the value of the specified decimal number to its equivalent string representation.

public:
 static System::String ^ ToString(System::Decimal value);
public static string ToString (decimal value);
static member ToString : decimal -> string
Public Shared Function ToString (value As Decimal) As String

參數

value
Decimal

要轉換的十進位數字。The decimal number to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將轉換 DecimalStringThe following example converts a Decimal to a String.

public:
   void ConvertStringDecimal( String^ stringVal )
   {
      Decimal decimalVal = 0;

      try
      {
         decimalVal = System::Convert::ToDecimal( stringVal );
         System::Console::WriteLine( "The String as a decimal is {0}.",
         decimalVal );
      }
      catch ( System::OverflowException^ ) 
      {
         System::Console::WriteLine(
            "The conversion from String to decimal overflowed." );
      }
      catch ( System::FormatException^ ) 
      {
         System::Console::WriteLine(
            "The String is not formatted as a decimal." );
      }
      catch ( System::ArgumentNullException^ ) 
      {
         System::Console::WriteLine( "The String is 0." );
      }
      
      // Decimal to String conversion will not overflow.
      stringVal = System::Convert::ToString( decimalVal );
      System::Console::WriteLine(
         "The decimal as a String is {0}.", stringVal );
   }
public void ConvertStringDecimal(string stringVal) {
    decimal decimalVal = 0;
    
    try {
        decimalVal = System.Convert.ToDecimal(stringVal);
        System.Console.WriteLine(
            "The string as a decimal is {0}.", decimalVal);
    }
    catch (System.OverflowException){
        System.Console.WriteLine(
            "The conversion from string to decimal overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is not formatted as a decimal.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine(
            "The string is null.");
    }

    // Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal);
    System.Console.WriteLine(
        "The decimal as a string is {0}.", stringVal);
}	
Public Sub ConvertStringDecimal(ByVal stringVal As String)
    Dim decimalVal As Decimal = 0

    Try
        decimalVal = System.Convert.ToDecimal(stringVal)
        System.Console.WriteLine("The string as a decimal is {0}.", _
                                  decimalVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in string-to-decimal conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a decimal.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

    ' Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal)
    System.Console.WriteLine("The decimal as a string is {0}.", _
                              stringVal)
End Sub

備註

這項實行與相同 Decimal.ToString()This implementation is identical to Decimal.ToString().

適用於

ToString(Object)

將指定之物件的值轉換為它的相等字串表示。Converts the value of the specified object to its equivalent string representation.

public:
 static System::String ^ ToString(System::Object ^ value);
public static string ToString (object value);
static member ToString : obj -> string
Public Shared Function ToString (value As Object) As String

參數

value
Object

提供要轉換之值的物件,或是 nullAn object that supplies the value to convert, or null.

傳回

String

value 的字串表示;如果 valuenull,則為 EmptyThe string representation of value, or Empty if value is null.

範例

下列範例會將物件陣列中的每個專案轉換為其相等的字串表示。The following example converts each element in an object array to its equivalent string representation.

object[] values = { false, 12.63m, new DateTime(2009, 6, 1, 6, 32, 15), 16.09e-12,
                    'Z', 15.15322, SByte.MinValue, Int32.MaxValue };
string result;

foreach (object value in values)
{
   result = Convert.ToString(value);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Boolean value False to the String value False.
//    Converted the Decimal value 12.63 to the String value 12.63.
//    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
//    Converted the Double value 1.609E-11 to the String value 1.609E-11.
//    Converted the Char value Z to the String value Z.
//    Converted the Double value 15.15322 to the String value 15.15322.
//    Converted the SByte value -128 to the String value -128.
//    Converted the Int32 value 2147483647 to the String value 2147483647.
Dim values() As Object = { False, 12.63d, #06/01/2009 6:32:15#, 16.09e-12, _
                           "Z"c, 15.15322, SByte.MinValue, Int32.MaxValue}
Dim result As String

For Each value As Object In values
   result = Convert.ToString(value)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Boolean value False to the String value False.
'    Converted the Decimal value 12.63 to the String value 12.63.
'    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
'    Converted the Double value 1.609E-11 to the String value 1.609E-11.
'    Converted the Char value Z to the String value Z.
'    Converted the Double value 15.15322 to the String value 15.15322.
'    Converted the SByte value -128 to the String value -128.
'    Converted the Int32 value 2147483647 to the String value 2147483647.      

備註

若要轉換 value 成其字串表示,方法會嘗試呼叫的 IConvertible.ToStringvalueTo convert value to its string representation, the method tries to call the IConvertible.ToString implementation of value. 如果 value 未執行 IConvertible 介面,方法會嘗試呼叫的 IFormattable.ToStringvalueIf value does not implement the IConvertible interface, the method tries to call the IFormattable.ToString implementation of value. 如果值未執行 IFormattable 介面,方法會呼叫 ToString 基礎類型的方法 valueIf value does not implement the IFormattable interface, the method calls the ToString method of the underlying type of value.

適用於

ToString(SByte)

重要

此 API 不符合 CLS 規範。

將指定之 8 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 8-bit signed integer to its equivalent string representation.

public:
 static System::String ^ ToString(System::SByte value);
public static string ToString (sbyte value);
[System.CLSCompliant(false)]
public static string ToString (sbyte value);
static member ToString : sbyte -> string
[<System.CLSCompliant(false)>]
static member ToString : sbyte -> string
Public Shared Function ToString (value As SByte) As String

參數

value
SByte

要轉換的 8 位元帶正負號的整數。The 8-bit signed integer to convert.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會將帶正負號之位元組陣列中的每個專案轉換為其相等的字串表示。The following example converts each element in a signed byte array to its equivalent string representation.

sbyte[] numbers = { SByte.MinValue, -12, 0, 16, SByte.MaxValue };
string result;

foreach (sbyte number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the SByte value -128 to the String value -128.
//    Converted the SByte value -12 to the String value -12.
//    Converted the SByte value 0 to the String value 0.
//    Converted the SByte value 16 to the String value 16.
//    Converted the SByte value 127 to the String value 127.
Dim numbers() As SByte = { SByte.MinValue, -12, 0, 16, SByte.MaxValue }
Dim result As String

For Each number As SByte In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the SByte value -128 to the String value -128.
'    Converted the SByte value -12 to the String value -12.
'    Converted the SByte value 0 to the String value 0.
'    Converted the SByte value 16 to the String value 16.
'    Converted the SByte value 127 to the String value 127.

備註

這項實行與相同 SByte.ToString()This implementation is identical to SByte.ToString().

適用於

ToString(Single)

將指定之單精確度浮點數的值,轉換為它的相等字串表示。Converts the value of the specified single-precision floating-point number to its equivalent string representation.

public:
 static System::String ^ ToString(float value);
public static string ToString (float value);
static member ToString : single -> string
Public Shared Function ToString (value As Single) As String

參數

value
Single

要轉換的單精確度浮點數。The single-precision floating-point number to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將值陣列中的每個元素轉換 Single 為其相等的字串表示。The following example converts each element in an array of Single values to its equivalent string representation.

float[] numbers = { Single.MinValue, -1011.351f, -17.45f, -3e-16f,
                    0f, 4.56e-12f, 16.0001f, 10345.1221f, Single.MaxValue };
string result;

foreach (float number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
//    Converted the Single value -1011.351 to the String value -1011.351.
//    Converted the Single value -17.45 to the String value -17.45.
//    Converted the Single value -3E-16 to the String value -3E-16.
//    Converted the Single value 0 to the String value 0.
//    Converted the Single value 4.56E-12 to the String value 4.56E-12.
//    Converted the Single value 16.0001 to the String value 16.0001.
//    Converted the Single value 10345.12 to the String value 10345.12.
//    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.
Dim numbers() As Single = { Single.MinValue, -1011.351, -17.45, -3e-16, _
                            0, 4.56e-12, 16.0001, 10345.1221, Single.MaxValue }
Dim result As String

For Each number As Single In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next                            
' The example displays the following output:
'    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
'    Converted the Single value -1011.351 to the String value -1011.351.
'    Converted the Single value -17.45 to the String value -17.45.
'    Converted the Single value -3E-16 to the String value -3E-16.
'    Converted the Single value 0 to the String value 0.
'    Converted the Single value 4.56E-12 to the String value 4.56E-12.
'    Converted the Single value 16.0001 to the String value 16.0001.
'    Converted the Single value 10345.12 to the String value 10345.12.
'    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

備註

這項實行與相同 Single.ToString()This implementation is identical to Single.ToString().

適用於

ToString(String)

傳回指定的字串執行個體,不執行實際的轉換。Returns the specified string instance; no actual conversion is performed.

public:
 static System::String ^ ToString(System::String ^ value);
public static string ToString (string value);
static member ToString : string -> string
Public Shared Function ToString (value As String) As String

參數

value
String

要傳回的字串。The string to return.

傳回

String

value 會原封不動地傳回。value is returned unchanged.

範例

下列範例會將字串傳遞給 ToString(String) 方法,並呼叫 Object.ReferenceEquals 方法來確認方法會傳回原始字串。The following example passes a string to the ToString(String) method and calls the Object.ReferenceEquals method to confirm that the method returns the original string. 此範例也會呼叫 String.IsInterned 方法,以確保兩個字串都不相同,因為原始字串會被暫留。The example also calls the String.IsInterned method to ensure that the two strings are not identical because the original string is interned.

using System;

public class Example
{
   public static void Main()
   {
      String article = "An";
      String noun = "apple";
      String str1 = String.Format("{0} {1}", article, noun);
      String str2 = Convert.ToString(str1);

      Console.WriteLine("str1 is interned: {0}",
                        ! (String.IsInterned(str1) == null));
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2));
   }
}
// The example displays the following output:
//       str1 is interned: False
//       str1 and str2 are the same reference: True
Module Example
   Public Sub Main()
      Dim article As String = "An"
      Dim noun As String = "apple"
      Dim str1 As String = String.Format("{0} {1}", article, noun)
      Dim str2 As String = Convert.ToString(str1)

      Console.WriteLine("str1 is interned: {0}",
                        Not String.IsInterned(str1) Is Nothing)
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2))
   End Sub
End Module
' The example displays the following output:
'       str1 is interned: False
'       str1 and str2 are the same reference: True

適用於

ToString(UInt16)

重要

此 API 不符合 CLS 規範。

將指定之 16 位元不帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 16-bit unsigned integer to its equivalent string representation.

public:
 static System::String ^ ToString(System::UInt16 value);
public static string ToString (ushort value);
[System.CLSCompliant(false)]
public static string ToString (ushort value);
static member ToString : uint16 -> string
[<System.CLSCompliant(false)>]
static member ToString : uint16 -> string
Public Shared Function ToString (value As UShort) As String

參數

value
UInt16

要轉換之 16 位元不帶正負號的整數。The 16-bit unsigned integer to convert.

傳回

String

value 的字串表示。The string representation of value.

屬性

範例

下列範例會將不帶正負號之16位整數值陣列中的每個專案轉換為它的相等字串表示。The following example converts each element in an array of unsigned 16-bit integer values to its equivalent string representation.

ushort[] numbers = { UInt16.MinValue, 103, 1045, UInt16.MaxValue };
string result;

foreach (ushort number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the String value 0.
//    Converted the UInt16 value 103 to the String value 103.
//    Converted the UInt16 value 1045 to the String value 1045.
//    Converted the UInt16 value 65535 to the String value 65535.
Dim numbers() As UShort = { UInt16.MinValue, 103, 1045, UInt16.MaxValue }
Dim result As String

For Each number As UShort In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt16 value 0 to the String value 0.
'    Converted the UInt16 value 103 to the String value 103.
'    Converted the UInt16 value 1045 to the String value 1045.
'    Converted the UInt16 value 65535 to the String value 65535.

備註

這項實行與相同 UInt16.ToString()This implementation is identical to UInt16.ToString().

適用於

ToString(Byte, Int32)

將 8 位元不帶正負號整數的值,轉換為它在指定基底中的相等字串表示。Converts the value of an 8-bit unsigned integer to its equivalent string representation in a specified base.

public:
 static System::String ^ ToString(System::Byte value, int toBase);
public static string ToString (byte value, int toBase);
static member ToString : byte * int -> string
Public Shared Function ToString (value As Byte, toBase As Integer) As String

參數

value
Byte

要轉換之 8 位元不帶正負號的整數。The 8-bit unsigned integer to convert.

toBase
Int32

傳回值的基底,必須是 2、8、10 或 16。The base of the return value, which must be 2, 8, 10, or 16.

傳回

String

在基底 valuetoBase 的字串表示。The string representation of value in base toBase.

例外狀況

toBase 不是 2、8、10 或 16。toBase is not 2, 8, 10, or 16.

範例

下列範例會將位元組陣列中的每個元素轉換為其相等的二進位、十六進位、十進位和十六進位字串表示。The following example converts each element in a byte array to its equivalent binary, hexadecimal, decimal, and hexadecimal string representations.

int[] bases = { 2, 8, 10, 16};
byte[] numbers = { Byte.MinValue, 12, 103, Byte.MaxValue};

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (byte number in numbers)
   {
      Console.WriteLine("   {0,-5}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          0      -->  0x0
//          12     -->  0x1100
//          103    -->  0x1100111
//          255    -->  0x11111111
//       Base 8 conversion:
//          0      -->  0x0
//          12     -->  0x14
//          103    -->  0x147
//          255    -->  0x377
//       Base 10 conversion:
//          0      -->  0x0
//          12     -->  0x12
//          103    -->  0x103
//          255    -->  0x255
//       Base 16 conversion:
//          0      -->  0x0
//          12     -->  0xc
//          103    -->  0x67
//          255    -->  0xff
Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Byte = { Byte.MinValue, 12, 103, Byte.MaxValue}

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Byte In numbers
      Console.WriteLine("   {0,-5}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          0      -->  0x0
'          12     -->  0x1100
'          103    -->  0x1100111
'          255    -->  0x11111111
'       Base 8 conversion:
'          0      -->  0x0
'          12     -->  0x14
'          103    -->  0x147
'          255    -->  0x377
'       Base 10 conversion:
'          0      -->  0x0
'          12     -->  0x12
'          103    -->  0x103
'          255    -->  0x255
'       Base 16 conversion:
'          0      -->  0x0
'          12     -->  0xc
'          103    -->  0x67
'          255    -->  0xff
let bases = [2; 8; 10; 16]
let numbers = [ Byte.MinValue; 12uy; 103uy; Byte.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -5i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//         0     -->  0x0
//         12    -->  0x1100
//         103   -->  0x1100111
//         255   -->  0x11111111
//     Base 8 conversion:
//         0     -->  0x0
//         12    -->  0x14
//         103   -->  0x147
//         255   -->  0x377
//     Base 10 conversion:
//         0     -->  0x0
//         12    -->  0x12
//         103   -->  0x103
//         255   -->  0x255
//     Base 16 conversion:
//         0     -->  0x0
//         12    -->  0xc
//         103   -->  0x67
//         255   -->  0xff

備註

如果不 toBase 等於10,則方法所傳回的字串 Convert.ToString(Byte, Int32) value 只代表其大小。If toBase does not equal 10, the string that is returned by the Convert.ToString(Byte, Int32) method represents value by its magnitude only. 如果呼叫方法來建立稍後將轉換回數位的字串,則應呼叫採用僅限大小數值標記法的對應方法來執行轉換。If the method is called to create a string that will later be converted back to a number, a corresponding method that assumes a magnitude-only numeric representation should be called to perform the conversion. 這類方法包括 Convert.ToByte(String, Int32)Byte.Parse(String, NumberStyles)Such methods include Convert.ToByte(String, Int32) or Byte.Parse(String, NumberStyles).

適用於

ToString(Boolean, IFormatProvider)

將指定的布林值轉換為它的相等字串表示。Converts the specified Boolean value to its equivalent string representation.

public:
 static System::String ^ ToString(bool value, IFormatProvider ^ provider);
public static string ToString (bool value, IFormatProvider provider);
public static string ToString (bool value, IFormatProvider? provider);
static member ToString : bool * IFormatProvider -> string
Public Shared Function ToString (value As Boolean, provider As IFormatProvider) As String

參數

value
Boolean

要轉換的布林值。The Boolean value to convert.

provider
IFormatProvider

物件的執行個體。An instance of an object. 這個參數已忽略。This parameter is ignored.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例 Boolean 會使用方法將值轉換成 String ToString ,並使用 IFormatProvider 會顯示其所呼叫之格式提供者類型的物件。The following example converts a Boolean value to a String with the ToString method, using an IFormatProvider object that displays the type of the format provider for which it is called. 此範例顯示 IFormatProvider 未參考該物件。The example shows that the IFormatProvider object is not referenced.

// Example of Convert::ToString( non-numeric types, IFormatProvider ).
using namespace System;
using namespace System::Globalization;

#define null (Object^)0

// An instance of this class can be passed to methods that require 
// an IFormatProvider.
ref class DummyProvider: public IFormatProvider
{
public:

   // Normally, GetFormat returns an object of the requested type
   // (usually itself) if it is able; otherwise, it returns Nothing. 
   virtual Object^ GetFormat( Type^ argType )
   {
      // Here, the type of argType is displayed, and GetFormat
      // always returns Nothing.
      Console::Write( "{0,-40}", argType->ToString() );
      return null;
   }
};

int main()
{
   // Create an instance of the IFormatProvider.
   DummyProvider^ provider = gcnew DummyProvider;
   String^ converted;

   // Convert these values using DummyProvider.
   int Int32A = -252645135;
   double DoubleA = 61680.3855;
   Object^ ObjDouble =  -98765.4321;
   DateTime DayTimeA = DateTime(2001,9,11,13,45,0);
   bool BoolA = true;
   String^ StringA = "Qwerty";
   Char CharA = '$';
   TimeSpan TSpanA = TimeSpan(0,18,0);
   Object^ ObjOther = static_cast<Object^>(provider);
   Console::WriteLine( "This example of "
   "Convert::ToString( non-numeric, IFormatProvider* ) \n"
   "generates the following output. The provider type, "
   "argument type, \nand argument value are displayed." );
   Console::WriteLine( "\nNote: The IFormatProvider object is "
   "not called for Boolean, String, \nChar, TimeSpan, "
   "and non-numeric Object." );

   // The format provider is called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( Int32A, provider );
   Console::WriteLine( "int      {0}", converted );
   converted = Convert::ToString( DoubleA, provider );
   Console::WriteLine( "double   {0}", converted );
   converted = Convert::ToString( ObjDouble, provider );
   Console::WriteLine( "Object   {0}", converted );
   converted = Convert::ToString( DayTimeA, provider );
   Console::WriteLine( "DateTime {0}", converted );

   // The format provider is not called for these conversions.
   Console::WriteLine();
   converted = Convert::ToString( BoolA, provider );
   Console::WriteLine( "bool     {0}", converted );
   converted = Convert::ToString( StringA, provider );
   Console::WriteLine( "String   {0}", converted );
   converted = Convert::ToString( CharA, provider );
   Console::WriteLine( "Char     {0}", converted );
   converted = Convert::ToString( TSpanA, provider );
   Console::WriteLine( "TimeSpan {0}", converted );
   converted = Convert::ToString( ObjOther, provider );
   Console::WriteLine( "Object   {0}", converted );
}

/*
This example of Convert::ToString( non-numeric, IFormatProvider* )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   Object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
String   Qwerty
Char     $
TimeSpan 00:18:00
Object   DummyProvider
*/
// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/
' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

備註

這項實行與相同 Boolean.ToStringThis implementation is identical to Boolean.ToString. 它會 Boolean.TrueString 傳回 true 值和 Boolean.FalseString false 值。It returns Boolean.TrueString for true values and Boolean.FalseString for false values.

適用於

ToString(Int64)

將指定之 64 位元帶正負號的整數值,轉換為它的相等字串表示。Converts the value of the specified 64-bit signed integer to its equivalent string representation.

public:
 static System::String ^ ToString(long value);
public static string ToString (long value);
static member ToString : int64 -> string
Public Shared Function ToString (value As Long) As String

參數

value
Int64

要轉換的 64 位元帶正負號的整數。The 64-bit signed integer to convert.

傳回

String

value 的字串表示。The string representation of value.

範例

下列範例會將長整數陣列中的每個元素轉換為其相等的字串表示。The following example converts each element in a long integer array to its equivalent string representation.

// Create a NumberFormatInfo object and set several of its
// properties that control default integer formatting.
System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();
provider.NegativeSign = "minus ";

long[] values = { -200, 0, 1000 };

foreach (long value in values)
   Console.WriteLine("{0,-6}  -->  {1,10}",
                     value, Convert.ToString(value, provider));
// The example displays the following output:
//       -200    -->   minus 200
//       0       -->           0
//       1000    -->        1000
' Create a NumberFormatInfo object and set several of its
' properties that control default integer formatting.
Dim provider As New System.Globalization.NumberFormatInfo()
provider.NegativeSign = "minus "

Dim values() As Long = { -200, 0, 1000 }

For Each value As Long In values
   Console.WriteLine("{0,-6}  -->  {1,10}", _
                     value, Convert.ToString(value, provider))
Next
' The example displays the following output:
'       -200    -->   minus 200
'       0       -->           0
'       1000    -->        1000

備註

這項實行與相同 Int64.ToString()This implementation is identical to Int64.ToString().

適用於