Convert.ToUInt32 方法

定义

将指定的值转换为 32 位无符号整数。Converts a specified value to a 32-bit unsigned integer.

重载

ToUInt32(Single)

将指定的单精度浮点数的值转换为等效的 32 位无符号整数。Converts the value of the specified single-precision floating-point number to an equivalent 32-bit unsigned integer.

ToUInt32(String, IFormatProvider)

使用指定的区域性特定格式设置信息,将数字的指定字符串表示形式转换为等效的 32 位无符号整数。Converts the specified string representation of a number to an equivalent 32-bit unsigned integer, using the specified culture-specific formatting information.

ToUInt32(String, Int32)

将指定基数的数字的字符串表示形式转换为等效的 32 位无符号整数。Converts the string representation of a number in a specified base to an equivalent 32-bit unsigned integer.

ToUInt32(Object, IFormatProvider)

使用指定的区域性特定格式信息,将指定对象的值转换为 32 位无符号整数。Converts the value of the specified object to a 32-bit unsigned integer, using the specified culture-specific formatting information.

ToUInt32(UInt64)

将指定的 64 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 64-bit unsigned integer to an equivalent 32-bit unsigned integer.

ToUInt32(UInt32)

返回指定的 32 位无符号整数;不执行任何实际的转换。Returns the specified 32-bit unsigned integer; no actual conversion is performed.

ToUInt32(UInt16)

将指定的 16 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 16-bit unsigned integer to the equivalent 32-bit unsigned integer.

ToUInt32(String)

将数字的指定字符串表示形式转换为等效的 32 位无符号整数。Converts the specified string representation of a number to an equivalent 32-bit unsigned integer.

ToUInt32(SByte)

将指定的 8 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 8-bit signed integer to the equivalent 32-bit unsigned integer.

ToUInt32(Byte)

将指定的 8 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 8-bit unsigned integer to the equivalent 32-bit unsigned integer.

ToUInt32(Int64)

将指定的 64 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 64-bit signed integer to an equivalent 32-bit unsigned integer.

ToUInt32(Int32)

将指定的 32 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 32-bit signed integer to an equivalent 32-bit unsigned integer.

ToUInt32(Int16)

将指定的 16 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 16-bit signed integer to the equivalent 32-bit unsigned integer.

ToUInt32(Double)

将指定的双精度浮点数的值转换为等效的 32 位无符号整数。Converts the value of the specified double-precision floating-point number to an equivalent 32-bit unsigned integer.

ToUInt32(Decimal)

将指定的十进制数的值转换为等效的 32 位无符号整数。Converts the value of the specified decimal number to an equivalent 32-bit unsigned integer.

ToUInt32(DateTime)

调用此方法始终引发 InvalidCastExceptionCalling this method always throws InvalidCastException.

ToUInt32(Char)

将指定 Unicode 字符的值转换为等效的 32 位无符号整数。Converts the value of the specified Unicode character to the equivalent 32-bit unsigned integer.

ToUInt32(Boolean)

将指定的布尔值转换为等效的 32 位无符号整数。Converts the specified Boolean value to the equivalent 32-bit unsigned integer.

ToUInt32(Object)

将指定对象的值转换为 32 位无符号整数。Converts the value of the specified object to a 32-bit unsigned integer.

ToUInt32(Single)

重要

此 API 不符合 CLS。

将指定的单精度浮点数的值转换为等效的 32 位无符号整数。Converts the value of the specified single-precision floating-point number to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(float value);
public static uint ToUInt32 (float value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (float value);
static member ToUInt32 : single -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : single -> uint32
Public Shared Function ToUInt32 (value As Single) As UInteger

参数

value
Single

要转换的单精度浮点数。The single-precision floating-point number to convert.

返回

UInt32

value,舍入为最接近的 32 位无符号整数。value, rounded to the nearest 32-bit unsigned integer. 如果 value 为两个整数中间的数字,则返回二者中的偶数;即 4.5 转换为 4,而 5.5 转换为 6。If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

属性

例外

value 小于零或大于 MaxValuevalue is less than zero or greater than MaxValue.

示例

下面的示例尝试将值数组中的每个元素转换 Single 为无符号整数。The following example attempts to convert each element in an array of Single values to an unsigned integer.

float[] values= { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
                  0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
uint result;

foreach (float value in values)
{
   try {
      result = Convert.ToUInt32(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    The Single value -3.402823E+38 is outside the range of the UInt32 type.
//    The Single value -1.38E+10 is outside the range of the UInt32 type.
//    The Single value -1023.299 is outside the range of the UInt32 type.
//    The Single value -12.98 is outside the range of the UInt32 type.
//    Converted the Single value 0 to the UInt32 value 0.
//    Converted the Single value 9.113E-16 to the UInt32 value 0.
//    Converted the Single value 103.919 to the UInt32 value 104.
//    Converted the Single value 17834.19 to the UInt32 value 17834.
//    The Single value 3.402823E+38 is outside the range of the UInt32 type.
Dim values() As Single = { Single.MinValue, -1.38e10, -1023.299, -12.98, _
                           0, 9.113e-16, 103.919, 17834.191, Single.MaxValue }
Dim result As UInteger

For Each value As Single In values
   Try
      result = Convert.ToUInt32(value)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        value.GetType().Name, value)
   End Try   
Next                                 
' The example displays the following output:
'    The Single value -3.402823E+38 is outside the range of the UInt32 type.
'    The Single value -1.38E+10 is outside the range of the UInt32 type.
'    The Single value -1023.299 is outside the range of the UInt32 type.
'    The Single value -12.98 is outside the range of the UInt32 type.
'    Converted the Single value 0 to the UInt32 value 0.
'    Converted the Single value 9.113E-16 to the UInt32 value 0.
'    Converted the Single value 103.919 to the UInt32 value 104.
'    Converted the Single value 17834.19 to the UInt32 value 17834.
'    The Single value 3.402823E+38 is outside the range of the UInt32 type.

另请参阅

适用于

ToUInt32(String, IFormatProvider)

重要

此 API 不符合 CLS。

使用指定的区域性特定格式设置信息,将数字的指定字符串表示形式转换为等效的 32 位无符号整数。Converts the specified string representation of a number to an equivalent 32-bit unsigned integer, using the specified culture-specific formatting information.

public:
 static System::UInt32 ToUInt32(System::String ^ value, IFormatProvider ^ provider);
public static uint ToUInt32 (string value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value, IFormatProvider provider);
static member ToUInt32 : string * IFormatProvider -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : string * IFormatProvider -> uint32
Public Shared Function ToUInt32 (value As String, provider As IFormatProvider) As UInteger

参数

value
String

包含要转换的数字的字符串。A string that contains the number to convert.

provider
IFormatProvider

一个提供区域性特定的格式设置信息的对象。An object that supplies culture-specific formatting information.

返回

UInt32

一个与 value 中数字等效的 32 位无符号整数,如果 valuenull,则为 0(零)。A 32-bit unsigned integer that is equivalent to the number in value, or 0 (zero) if value is null.

属性

例外

value 不由一个可选符号后跟一系列数字 (0-9) 组成。value does not consist of an optional sign followed by a sequence of digits (0 through 9).

value 表示一个小于 MinValue 或大于 MaxValue 的数字。value represents a number that is less than MinValue or greater than MaxValue.

示例

下面的示例定义了一个自定义 NumberFormatInfo 对象,该对象将字符串 "pos" 识别为正号,将字符串 "neg" 识别为负号。The following example defines a custom NumberFormatInfo object that recognizes the string "pos" as the positive sign and the string "neg" as the negative sign. 然后,它会使用此提供程序和固定区域性的提供程序尝试将数值字符串数组的每个元素转换为整数 NumberFormatInfoIt then attempts to convert each element of a numeric string array to an integer using both this provider and the NumberFormatInfo provider for the invariant culture.

using System;
using System.Globalization;

public class Class1
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set several of its
      // properties that apply to numbers.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.PositiveSign = "pos ";
      provider.NegativeSign = "neg ";

      // Define an array of numeric strings.
      string[] values = { "123456789", "+123456789", "pos 123456789",
                          "123456789.", "123,456,789",  "4294967295",
                          "4294967296", "-1", "neg 1" };

      foreach (string value in values)
      {
         Console.Write("{0,-20} -->", value);
         try {
            Console.WriteLine("{0,20}", Convert.ToUInt32(value, provider));
         }
         catch (FormatException) {
            Console.WriteLine("{0,20}", "Bad Format");
         }
         catch (OverflowException) {
            Console.WriteLine("{0,20}", "Numeric Overflow");
         }
      }
   }
}
// The example displays the following output:
//       123456789            -->           123456789
//       +123456789           -->          Bad Format
//       pos 123456789        -->           123456789
//       123456789.           -->          Bad Format
//       123,456,789          -->          Bad Format
//       4294967295           -->          4294967295
//       4294967296           -->    Numeric Overflow
//       -1                   -->          Bad Format
//       neg 1                -->    Numeric Overflow
Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set several of its
      ' properties that apply to numbers.
      Dim provider As New NumberFormatInfo() 
      provider.PositiveSign = "pos "
      provider.NegativeSign = "neg "

      ' Define an array of numeric strings.
      Dim values() As String = { "123456789", "+123456789", "pos 123456789", _
                                 "123456789.", "123,456,789",  "4294967295", _
                                 "4294967296", "-1", "neg 1" }

      For Each value As String In values
         Console.Write("{0,-20} -->", value)
         Try
            Console.WriteLine("{0,20}", Convert.ToUInt32(value, provider))
         Catch e As FormatException
            Console.WriteLine("{0,20}", "Bad Format")
         Catch e As OverflowException
            Console.WriteLine("{0,20}", "Numeric Overflow")
         End Try   
      Next
    End Sub 
End Module 
' The example displays the following output:
'       123456789            -->           123456789
'       +123456789           -->          Bad Format
'       pos 123456789        -->           123456789
'       123456789.           -->          Bad Format
'       123,456,789          -->          Bad Format
'       4294967295           -->          4294967295
'       4294967296           -->    Numeric Overflow
'       -1                   -->          Bad Format
'       neg 1                -->    Numeric Overflow

注解

返回值是对调用的结果 UInt32.Parse valueThe return value is the result of invoking UInt32.Parse on value.

provider 是一个 IFormatProvider 获取对象的实例 NumberFormatInfoprovider is an IFormatProvider instance that obtains a NumberFormatInfo object. NumberFormatInfo对象提供有关的格式的区域性特定信息 valueThe NumberFormatInfo object provides culture-specific information about the format of value. 如果 providernull ,则 NumberFormatInfo 使用当前区域性的。If provider is null, the NumberFormatInfo for the current culture is used.

如果你不希望在转换失败时处理异常,则可以改为调用 UInt32.TryParse 方法。If you prefer not to handle an exception if the conversion fails, you can call the UInt32.TryParse method instead. 它将返回一个 Boolean 值,该值指示转换是成功还是失败。It returns a Boolean value that indicates whether the conversion succeeded or failed.

适用于

ToUInt32(String, Int32)

重要

此 API 不符合 CLS。

将指定基数的数字的字符串表示形式转换为等效的 32 位无符号整数。Converts the string representation of a number in a specified base to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::String ^ value, int fromBase);
public static uint ToUInt32 (string value, int fromBase);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value, int fromBase);
static member ToUInt32 : string * int -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : string * int -> uint32
Public Shared Function ToUInt32 (value As String, fromBase As Integer) As UInteger

参数

value
String

包含要转换的数字的字符串。A string that contains the number to convert.

fromBase
Int32

value 中数字的基数,它必须是 2、8、10 或 16。The base of the number in value, which must be 2, 8, 10, or 16.

返回

UInt32

一个与 value 中数字等效的 32 位无符号整数,如果 valuenull,则为 0(零)。A 32-bit unsigned integer that is equivalent to the number in value, or 0 (zero) if value is null.

属性

例外

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

- 或 --or-

value(表示非 10 为基数的无符号数字)的前面带一个负号。value, which represents a non-base 10 unsigned number, is prefixed with a negative sign.

valueEmptyvalue is Empty.

value 包含一个字符,该字符不是由 fromBase 指定的基数中的有效数字。value contains a character that is not a valid digit in the base specified by fromBase. 如果 value 中的第一个字符无效,则该异常消息指示没有要转换的数字;否则,该消息指示 value 包含无效的尾随字符。The exception message indicates that there are no digits to convert if the first character in value is invalid; otherwise, the message indicates that value contains invalid trailing characters.

value(表示非 10 为基数的无符号数字)的前面带一个负号。value, which represents a non-base 10 unsigned number, is prefixed with a negative sign.

- 或 --or-

value 表示一个小于 MinValue 或大于 MaxValue 的数字。value represents a number that is less than MinValue or greater than MaxValue.

示例

下面的示例尝试将数值字符串数组中的每个元素解释为十六进制值并将其转换为无符号整数。The following example attempts to interpret each element in an array of numeric strings as a hexadecimal value and to convert it to an unsigned integer.

public class Example
{
   public static void Main()
   {
      string[] hexStrings = { "80000000", "0FFFFFFF", "F0000000", "00A3000", "D",
                              "-13", "9AC61", "GAD", "FFFFFFFFFF" };

      foreach (string hexString in hexStrings)
      {
         Console.Write("{0,-12}  -->  ", hexString);
         try {
            uint number = Convert.ToUInt32(hexString, 16);
            Console.WriteLine("{0,18:N0}", number);
         }
         catch (FormatException) {
            Console.WriteLine("{0,18}", "Bad Format");
         }
         catch (OverflowException)
         {
            Console.WriteLine("{0,18}", "Numeric Overflow");
         }
         catch (ArgumentException) {
            Console.WriteLine("{0,18}", "Invalid in Base 16");
         }
      }
   }
}
// The example displays the following output:
//       80000000      -->       2,147,483,648
//       0FFFFFFF      -->         268,435,455
//       F0000000      -->       4,026,531,840
//       00A3000       -->             667,648
//       D             -->                  13
//       -13           -->  Invalid in Base 16
//       9AC61         -->             633,953
//       GAD           -->          Bad Format
//       FFFFFFFFFF    -->    Numeric Overflow
Module Example
   Public Sub Main()
      Dim hexStrings() As String = { "80000000", "0FFFFFFF", "F0000000", "00A3000", "D", _
                                     "-13", "9AC61", "GAD", "FFFFFFFFFF" }
      For Each hexString As String In hexStrings
         Console.Write("{0,-12}  -->  ", hexString)
         Try
            Dim number As UInteger = Convert.ToUInt32(hexString, 16)
            Console.WriteLine("{0,18:N0}", number)
         Catch e As FormatException
            Console.WriteLine("{0,18}", "Bad Format")
         Catch e As OverflowException
            Console.WriteLine("{0,18}", "Numeric Overflow")
         Catch e As ArgumentException
            Console.WriteLine("{0,18}", "Invalid in Base 16")
         End Try
      Next                                            
   End Sub
End Module
'    ' The example displays the following output:
'    80000000      -->       2,147,483,648
'    0FFFFFFF      -->         268,435,455
'    F0000000      -->       4,026,531,840
'    00A3000       -->             667,648
'    D             -->                  13
'    -13           -->  Invalid in Base 16
'    9AC61         -->             633,953
'    GAD           -->          Bad Format
'    FFFFFFFFFF    -->    Numeric Overflow

注解

如果 fromBase 为16,则可以为参数指定的数字加上 value "0x" 或 "0x" 作为前缀。If fromBase is 16, you can prefix the number specified by the value parameter with "0x" or "0X".

由于 UInt32 数据类型仅支持无符号值,因此该 ToUInt32(String, Int32) 方法假定 value 使用无符号二进制表示形式表示。Because the UInt32 data type supports unsigned values only, the ToUInt32(String, Int32) method assumes that value is expressed using unsigned binary representation. 换句话说,所有32位均用于表示数值,并且不存在符号位。In other words, all 32 bits are used to represent the numeric value, and a sign bit is absent. 因此,可以编写代码,在此代码中,如果有符号整数值超出了数据类型的范围,则会 UInt32 将其转换为一个 UInt32 值,而不会引发异常。As a result, it is possible to write code in which a signed integer value that is out of the range of the UInt32 data type is converted to a UInt32 value without the method throwing an exception. 下面的示例将转换 MinValue 为其十六进制字符串表示形式,然后调用 ToUInt32(String, Int32) 方法。The following example converts MinValue to its hexadecimal string representation, and then calls the ToUInt32(String, Int32) method. 方法会显示消息 "0x80000000 转换为 2147483648",而不是引发异常。Instead of throwing an exception, the method displays the message, "0x80000000 converts to 2147483648."

// Create a hexadecimal value out of range of the UInt32 type.
string value = Convert.ToString(Int32.MinValue, 16);
// Convert it back to a number.
try
{
   UInt32 number = Convert.ToUInt32(value, 16);
   Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.",
                     value);
}
' Create a hexadecimal value out of range of the UInt32 type.
Dim value As String = Convert.ToString(Integer.MinValue, 16)
' Convert it back to a number.
Try
   Dim number As UInt32 = Convert.ToUInt32(value, 16)
   Console.WriteLine("0x{0} converts to {1}.", value, number)
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.", _
                     value)
End Try   

执行二元运算或数值转换时,开发人员始终负责验证方法或运算符是否使用适当的数值表示形式来解释特定值。When performing binary operations or numeric conversions, it is always the responsibility of the developer to verify that a method or operator is using the appropriate numeric representation to interpret a particular value. 下面的示例演示了一种方法,用于确保在将十六进制字符串转换为值时,方法不会将二进制表示形式不当地用于解释使用两个补数表示形式的值 UInt32The following example illustrates one technique for ensuring that the method does not inappropriately use binary representation to interpret a value that uses two's complement representation when converting a hexadecimal string to a UInt32 value. 该示例在将值转换为其字符串表示形式时,确定某个值是否表示有符号或无符号整数。The example determines whether a value represents a signed or an unsigned integer while it is converting that value to its string representation. 当示例将值转换为值时 UInt32 ,它会检查原始值是否为有符号整数。When the example converts the value to a UInt32 value, it checks whether the original value was a signed integer. 如果是这样,并设置了其高序位 (表明原始值为负) ,则该方法将引发异常。If so, and if its high-order bit is set (which indicates that the original value was negative), the method throws an exception.

// Create a negative hexadecimal value out of range of the UInt32 type.
int sourceNumber = Int32.MinValue;
bool isSigned = Math.Sign((int)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt32 targetNumber;
try
{
   targetNumber = Convert.ToUInt32(value, 16);
   if (isSigned && ((targetNumber & 0x80000000) != 0))
      throw new OverflowException();
   else
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.",
                     value);
}
// Displays the following to the console:
//    Unable to convert '0x80000000' to an unsigned integer.
' Create a negative hexadecimal value out of range of the UInt32 type.
Dim sourceNumber As Integer = Integer.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt32
Try
   targetNumber = Convert.ToUInt32(value, 16)
   If isSigned And ((targetNumber And &H80000000) <> 0) Then
      Throw New OverflowException()
   Else 
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
   End If    
Catch e As OverflowException
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned integer.", _
                     value)
End Try 
' Displays the following to the console:
'    Unable to convert '0x80000000' to an unsigned integer.    

适用于

ToUInt32(Object, IFormatProvider)

重要

此 API 不符合 CLS。

使用指定的区域性特定格式信息,将指定对象的值转换为 32 位无符号整数。Converts the value of the specified object to a 32-bit unsigned integer, using the specified culture-specific formatting information.

public:
 static System::UInt32 ToUInt32(System::Object ^ value, IFormatProvider ^ provider);
public static uint ToUInt32 (object value, IFormatProvider provider);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object value, IFormatProvider provider);
static member ToUInt32 : obj * IFormatProvider -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : obj * IFormatProvider -> uint32
Public Shared Function ToUInt32 (value As Object, provider As IFormatProvider) As UInteger

参数

value
Object

一个实现 IConvertible 接口的对象。An object that implements the IConvertible interface.

provider
IFormatProvider

一个提供区域性特定的格式设置信息的对象。An object that supplies culture-specific formatting information.

返回

UInt32

一个与 value 等效的 32 位无符号整数,如果 valuenull,则为零。A 32-bit unsigned integer that is equivalent to value, or zero if value is null.

属性

例外

value 的格式不正确。value is not in an appropriate format.

value 不实现 IConvertible 接口。value does not implement the IConvertible interface.

- 或 --or-

不支持该转换。The conversion is not supported.

value 表示一个小于 MinValue 或大于 MaxValue 的数字。value represents a number that is less than MinValue or greater than MaxValue.

示例

下面的示例定义了一个 HexString 类,该类实现 IConvertible 接口,并用于保存32位有符号值和32位无符号值的字符串表示形式。The following example defines a HexString class that implements the IConvertible interface and that is designed to hold the string representation of both 32-bit signed and 32-bit unsigned values. 类包含一个 Sign 属性,该属性指示其十六进制值的符号。The class includes a Sign property that indicates the sign of its hexadecimal value.

using System;
using System.Globalization;
using System.Text.RegularExpressions;

public enum SignBit { Negative=-1, Zero=0, Positive=1 };

public struct HexString : IConvertible
{
   private SignBit signBit;
   private string hexString;

   public SignBit Sign
   {
      set { signBit = value; }
      get { return signBit; }
   }

   public string Value
   {
      set {
         if (value.Trim().Length > 8)
            throw new ArgumentException("The string representation of a 32-bit integer cannot have more than 8 characters.");
         else if (! Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase))
            throw new ArgumentException("The hexadecimal representation of a 32-bit integer contains invalid characters.");
         else
            hexString = value;
      }
      get { return hexString; }
   }

   // IConvertible implementations.
   public TypeCode GetTypeCode()
   {
      return TypeCode.Object;
   }

   public bool ToBoolean(IFormatProvider provider)
   {
      return signBit != SignBit.Zero;
   }

   public byte ToByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt32(hexString, 16)));
      else
         try {
            return Byte.Parse(hexString, NumberStyles.HexNumber);
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt32(hexString, 16)), e);
         }
   }

   public char ToChar(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt32(hexString, 16)));

      try {
         ushort codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
         return Convert.ToChar(codePoint);
      }
      catch (OverflowException e) {
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt32(hexString, 16)), e);
      }
   }

   public DateTime ToDateTime(IFormatProvider provider)
   {
      throw new InvalidCastException("Hexadecimal to DateTime conversion is not supported.");
   }

   public decimal ToDecimal(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
      {
         int hexValue = Int32.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
      else
      {
         uint hexValue = UInt32.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
   }

   public double ToDouble(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToDouble(Int32.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToDouble(UInt32.Parse(hexString, NumberStyles.HexNumber));
   }

   public short ToInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToInt16(Int32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt32(hexString, 16)), e);
         }
      else
         try {
            return Convert.ToInt16(UInt32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt32(hexString, 16)), e);
         }
   }

   public int ToInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Int32.Parse(hexString, NumberStyles.HexNumber);
      else
         try {
            return Convert.ToInt32(UInt32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt32(hexString, 16)), e);
         }
   }

   public long ToInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt64(Int32.Parse(hexString, NumberStyles.HexNumber));
      else
         return Int64.Parse(hexString, NumberStyles.HexNumber);
   }

   public sbyte ToSByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToSByte(Int32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                      Int32.Parse(hexString, NumberStyles.HexNumber), e));
         }
      else
         try {
            return Convert.ToSByte(UInt32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                    UInt32.Parse(hexString, NumberStyles.HexNumber)), e);
         }
   }

   public float ToSingle(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToSingle(Int32.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToSingle(UInt32.Parse(hexString, NumberStyles.HexNumber));
   }

   public string ToString(IFormatProvider provider)
   {
      return "0x" + this.hexString;
   }

   public object ToType(Type conversionType, IFormatProvider provider)
   {
      switch (Type.GetTypeCode(conversionType))
      {
         case TypeCode.Boolean:
            return this.ToBoolean(null);
         case TypeCode.Byte:
            return this.ToByte(null);
         case TypeCode.Char:
            return this.ToChar(null);
         case TypeCode.DateTime:
            return this.ToDateTime(null);
         case TypeCode.Decimal:
            return this.ToDecimal(null);
         case TypeCode.Double:
            return this.ToDouble(null);
         case TypeCode.Int16:
            return this.ToInt16(null);
         case TypeCode.Int32:
            return this.ToInt32(null);
         case TypeCode.Int64:
            return this.ToInt64(null);
         case TypeCode.Object:
            if (typeof(HexString).Equals(conversionType))
               return this;
            else
               throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
         case TypeCode.SByte:
            return this.ToSByte(null);
         case TypeCode.Single:
            return this.ToSingle(null);
         case TypeCode.String:
            return this.ToString(null);
         case TypeCode.UInt16:
            return this.ToUInt16(null);
         case TypeCode.UInt32:
            return this.ToUInt32(null);
         case TypeCode.UInt64:
            return this.ToUInt64(null);
         default:
            throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
      }
   }

   public ushort ToUInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)));
      else
         try {
            return Convert.ToUInt16(UInt32.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt32(hexString, 16)), e);
         }
   }

   public uint ToUInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt32(hexString, 16);
   }

   public ulong ToUInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt64(hexString, 16);
   }
}
Imports System.Globalization
Imports System.Text.RegularExpressions

Public Enum SignBit As Integer
   Positive = 1
   Zero = 0
   Negative = -1
End Enum

Public Structure HexString : Implements IConvertible
   Private signBit As SignBit
   Private hexString As String
   
   Public Property Sign As SignBit
      Set
         signBit = value
      End Set
      Get
         Return signBit
      End Get
   End Property
   
   Public Property Value As String
      Set
         If value.Trim().Length > 8 Then
            Throw New ArgumentException("The string representation of a 32-bit integer cannot have more than 8 characters.")
         Else If Not Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) Then
            Throw New ArgumentException("The hexadecimal representation of a 32-bit integer contains invalid characters.")             
         Else
            hexString = value
         End If   
      End Set
      Get
         Return hexString
      End Get
   End Property
   
   ' IConvertible implementations.
   Public Function GetTypeCode() As TypeCode _
                   Implements IConvertible.GetTypeCode
      Return TypeCode.Object
   End Function
   
   Public Function ToBoolean(provider As IFormatProvider) As Boolean _
                   Implements IConvertible.ToBoolean
      Return signBit <> SignBit.Zero
   End Function 
   
   Public Function ToByte(provider As IFormatProvider) As Byte _
                   Implements IConvertible.ToByte
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToInt32(hexString, 16))) 
      Else
         Try
            Return Byte.Parse(hexString, NumberStyles.HexNumber)
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToUInt32(hexString, 16)), e)
         End Try   
      End If       
   End Function
   
   Public Function ToChar(provider As IFormatProvider) As Char _
                   Implements IConvertible.ToChar
      If signBit = SignBit.Negative Then 
         Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToInt32(hexString, 16)))
      End If
      
      Try
         Dim codePoint As UInt16 = UInt16.Parse(Me.hexString, NumberStyles.HexNumber)
         Return Convert.ToChar(codePoint)
      Catch e As OverflowException
         Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt32(hexString, 16)))
      End Try      
   End Function 
   
   Public Function ToDateTime(provider As IFormatProvider) As Date _
                   Implements IConvertible.ToDateTime
      Throw New InvalidCastException("Hexadecimal to DateTime conversion is not supported.")
   End Function
   
   Public Function ToDecimal(provider As IFormatProvider) As Decimal _
                   Implements IConvertible.ToDecimal
      If signBit = SignBit.Negative Then
         Dim hexValue As Integer = Int32.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      Else
         Dim hexValue As UInteger = UInt32.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      End If
   End Function
   
   Public Function ToDouble(provider As IFormatProvider) As Double _
                   Implements IConvertible.ToDouble
      If signBit = SignBit.Negative Then
         Return Convert.ToDouble(Int32.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToDouble(UInt32.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function   
   
   Public Function ToInt16(provider As IFormatProvider) As Int16 _
                   Implements IConvertible.ToInt16
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToInt16(Int32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt32(hexString, 16)), e)
         End Try
      Else
         Try
            Return Convert.ToInt16(UInt32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt32(hexString, 16)), e)
         End Try
      End If   
   End Function
   
   Public Function ToInt32(provider As IFormatProvider) As Int32 _
                   Implements IConvertible.ToInt32
      If signBit = SignBit.Negative Then
         Return Int32.Parse(hexString, NumberStyles.HexNumber)
      Else
         Try
            Return Convert.ToInt32(UInt32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt32(hexString, 16)), e)
         End Try   
      End If   
   End Function
   
   Public Function ToInt64(provider As IFormatProvider) As Int64 _
                   Implements IConvertible.ToInt64
      If signBit = SignBit.Negative Then
         Return Convert.ToInt64(Int32.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Int64.Parse(hexString, NumberStyles.HexNumber)
      End If   
   End Function
   
   Public Function ToSByte(provider As IFormatProvider) As SByte _
                   Implements IConvertible.ToSByte
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToSByte(Int32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                      Int32.Parse(hexString, NumberStyles.HexNumber), e))
         End Try
      Else
         Try
            Return Convert.ToSByte(UInt32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                    UInt32.Parse(hexString, NumberStyles.HexNumber)), e)
         End Try   
      End If
   End Function

   Public Function ToSingle(provider As IFormatProvider) As Single _
                   Implements IConvertible.ToSingle
      If signBit = SignBit.Negative Then
         Return Convert.ToSingle(Int32.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToSingle(UInt32.Parse(hexString, NumberStyles.HexNumber))
      End If   
   End Function

   Public Overloads Function ToString(provider As IFormatProvider) As String _
                   Implements IConvertible.ToString
      Return "0x" & Me.hexString
   End Function
   
   Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _
                   Implements IConvertible.ToType
      Select Case Type.GetTypeCode(conversionType)
         Case TypeCode.Boolean 
            Return Me.ToBoolean(Nothing)
         Case TypeCode.Byte
            Return Me.ToByte(Nothing)
         Case TypeCode.Char
            Return Me.ToChar(Nothing)
         Case TypeCode.DateTime
            Return Me.ToDateTime(Nothing)
         Case TypeCode.Decimal
            Return Me.ToDecimal(Nothing)
         Case TypeCode.Double
            Return Me.ToDouble(Nothing)
         Case TypeCode.Int16
            Return Me.ToInt16(Nothing)
         Case TypeCode.Int32
            Return Me.ToInt32(Nothing)
         Case TypeCode.Int64
            Return Me.ToInt64(Nothing)
         Case TypeCode.Object
            If GetType(HexString).Equals(conversionType) Then
               Return Me
            Else
               Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name))
            End If 
         Case TypeCode.SByte
            Return Me.ToSByte(Nothing)
         Case TypeCode.Single
            Return Me.ToSingle(Nothing)
         Case TypeCode.String
            Return Me.ToString(Nothing)
         Case TypeCode.UInt16
            Return Me.ToUInt16(Nothing)
         Case TypeCode.UInt32
            Return Me.ToUInt32(Nothing)
         Case TypeCode.UInt64
            Return Me.ToUInt64(Nothing)   
         Case Else
            Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name))   
      End Select
   End Function
   
   Public Function ToUInt16(provider As IFormatProvider) As UInt16 _
                   Implements IConvertible.ToUInt16
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt16 type.", _
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Try
            Return Convert.ToUInt16(UInt32.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt32(hexString, 16)), e)
         End Try            
      End If   
   End Function

   Public Function ToUInt32(provider As IFormatProvider) As UInt32 _
                   Implements IConvertible.ToUInt32
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt32(hexString, 16)
      End If   
   End Function
   
   Public Function ToUInt64(provider As IFormatProvider) As UInt64 _
                   Implements IConvertible.ToUInt64
      If signBit = SignBit.Negative Then
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt64 type.", _
                                                   Int32.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt64(hexString, 16)
      End If   
   End Function
   
End Structure

下面的示例演示对 ToUInt32(Object, IFormatProvider) 作为参数传递对象的方法的调用 HexString ,进而调用 IConvertible.ToUInt32 类的实现 HexStringThe following example shows that a call to the ToUInt32(Object, IFormatProvider) method that passes a HexString object as a parameter, in turn, calls the IConvertible.ToUInt32 implementation of the HexString class.

public class Example
{
   public static void Main()
   {
      uint positiveValue = 320000000;
      int negativeValue = -1;

      HexString positiveString = new HexString();
      positiveString.Sign = (SignBit) Math.Sign(positiveValue);
      positiveString.Value = positiveValue.ToString("X4");

      HexString negativeString = new HexString();
      negativeString.Sign = (SignBit) Math.Sign(negativeValue);
      negativeString.Value = negativeValue.ToString("X4");

      try {
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt32(positiveString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt32 type.",
                           Int32.Parse(positiveString.Value, NumberStyles.HexNumber));
      }

      try {
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt32(negativeString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt32 type.",
                           Int32.Parse(negativeString.Value, NumberStyles.HexNumber));
      }
   }
}
// The example dosplays the following output:
//       0x1312D000 converts to 320000000.
//       -1 is outside the range of the UInt32 type.
Module Example
   Public Sub Main()
      Dim positiveValue As UInt32 = 320000000
      Dim negativeValue As Int32 = -1
      
      
      Dim positiveString As New HexString()
      positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
      positiveString.Value = positiveValue.ToString("X4")
      
      Dim negativeString As New HexString()
      negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
      negativeString.Value = negativeValue.ToString("X4")
      
      Try
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt32(positiveString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt32 type.", _
                           Int32.Parse(positiveString.Value, NumberStyles.HexNumber))
      End Try

      Try
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt32(negativeString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt32 type.", _
                           Int32.Parse(negativeString.Value, NumberStyles.HexNumber))
      End Try   
   End Sub
End Module
' The example dosplays the following output:
'       0x1312D000 converts to 320000000.
'       -1 is outside the range of the UInt32 type.

注解

返回值是调用的 IConvertible.ToUInt32 基础类型的方法的结果 valueThe return value is the result of invoking the IConvertible.ToUInt32 method of the underlying type of value.

provider 使用户能够指定有关的内容的特定于区域性的转换信息 valueprovider enables the user to specify culture-specific conversion information about the contents of value. 例如,如果 value 是表示数字的,则 String provider 可能提供有关用于表示该数字的表示法的区域性特定信息。For example, if value is a String that represents a number, provider could supply culture-specific information about the notation used to represent that number.

基类型将忽略 provider ; 但是,如果 value 是实现接口的用户定义类型,则可以使用参数 IConvertibleThe base types ignore provider; however, the parameter may be used if value is a user-defined type that implements the IConvertible interface.

适用于

ToUInt32(UInt64)

重要

此 API 不符合 CLS。

将指定的 64 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 64-bit unsigned integer to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::UInt64 value);
public static uint ToUInt32 (ulong value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (ulong value);
static member ToUInt32 : uint64 -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint64 -> uint32
Public Shared Function ToUInt32 (value As ULong) As UInteger

参数

value
UInt64

要转换的 64 位无符号整数。The 64-bit unsigned integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

例外

value 大于 MaxValuevalue is greater than MaxValue.

示例

下面的示例尝试将无符号长整数数组中的每个元素转换为无符号整数值。The following example attempts to convert each element in an unsigned long integer array to an unsigned integer value.

ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
uint result;
foreach (ulong number in numbers)
{
   try {
      result = Convert.ToUInt32(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt64 value 0 to the UInt32 value 0.
//    Converted the UInt64 value 121 to the UInt32 value 121.
//    Converted the UInt64 value 340 to the UInt32 value 340.
//    The UInt64 value 18446744073709551615 is outside the range of the UInt32 type.
Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue }
Dim result As UInteger

For Each number As ULong In numbers
   Try
      result = Convert.ToUInt32(number)
      Console.WriteLine("Converted the {0} value {1} to a {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    Converted the UInt64 value 0 to a UInt32 value 0.
'    Converted the UInt64 value 121 to a UInt32 value 121.
'    Converted the UInt64 value 340 to a UInt32 value 340.
'    The UInt64 value 18446744073709551615 is outside the range of the UInt32 type.

适用于

ToUInt32(UInt32)

重要

此 API 不符合 CLS。

返回指定的 32 位无符号整数;不执行任何实际的转换。Returns the specified 32-bit unsigned integer; no actual conversion is performed.

public:
 static System::UInt32 ToUInt32(System::UInt32 value);
public static uint ToUInt32 (uint value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (uint value);
static member ToUInt32 : uint32 -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint32 -> uint32
Public Shared Function ToUInt32 (value As UInteger) As UInteger

参数

value
UInt32

要返回的 32 位无符号整数。The 32-bit unsigned integer to return.

返回

UInt32

不经更改即返回 valuevalue is returned unchanged.

属性

适用于

ToUInt32(UInt16)

重要

此 API 不符合 CLS。

将指定的 16 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 16-bit unsigned integer to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::UInt16 value);
public static uint ToUInt32 (ushort value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (ushort value);
static member ToUInt32 : uint16 -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : uint16 -> uint32
Public Shared Function ToUInt32 (value As UShort) As UInteger

参数

value
UInt16

要转换的 16 位无符号整数。The 16-bit unsigned integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

示例

下面的示例将无符号16位整数数组中的每个元素转换为无符号整数值。The following example converts each element in an unsigned 16-bit integer array to an unsigned integer value.

ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
uint result;
foreach (ushort number in numbers)
{
   result = Convert.ToUInt32(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 UInt32 value 0.
//    Converted the UInt16 value 121 to the UInt32 value 121.
//    Converted the UInt16 value 340 to the UInt32 value 340.
//    Converted the UInt16 value 65535 to the UInt32 value 65535.
Dim numbers() As UShort = { UInt16.MinValue, 121, 340, UInt16.MaxValue }
Dim result As UInteger

For Each number As UShort In numbers
   result = Convert.ToUInt32(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 UInt32 value 0.
'    Converted the UInt16 value 121 to the UInt32 value 121.
'    Converted the UInt16 value 340 to the UInt32 value 340.
'    Converted the UInt16 value 65535 to the UInt32 value 65535.      

适用于

ToUInt32(String)

重要

此 API 不符合 CLS。

将数字的指定字符串表示形式转换为等效的 32 位无符号整数。Converts the specified string representation of a number to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::String ^ value);
public static uint ToUInt32 (string value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (string value);
static member ToUInt32 : string -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : string -> uint32
Public Shared Function ToUInt32 (value As String) As UInteger

参数

value
String

包含要转换的数字的字符串。A string that contains the number to convert.

返回

UInt32

一个与 value 中数字等效的 32 位无符号整数,如果 valuenull,则为 0(零)。A 32-bit unsigned integer that is equivalent to the number in value, or 0 (zero) if value is null.

属性

例外

value 不由一个可选符号后跟一系列数字 (0-9) 组成。value does not consist of an optional sign followed by a sequence of digits (0 through 9).

value 表示一个小于 MinValue 或大于 MaxValue 的数字。value represents a number that is less than MinValue or greater than MaxValue.

示例

下面的示例将字符串数组中的元素解释为数值字符串并尝试将其转换为无符号整数。The following example interprets the elements in a string array as numeric strings and attempts to convert them to unsigned integers.

string[] values = { "One", "1.34e28", "-26.87", "-18", "-6.00",
                    " 0", "137", "1601.9", Int32.MaxValue.ToString() };
uint result;

foreach (string value in values)
{
   try {
      result = Convert.ToUInt32(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value '{1}' is outside the range of the UInt32 type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value '{1}' is not in a recognizable format.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    The String value 'One' is not in a recognizable format.
//    The String value '1.34e28' is not in a recognizable format.
//    The String value '-26.87' is not in a recognizable format.
//    The String value '-18' is outside the range of the UInt32 type.
//    The String value '-6.00' is not in a recognizable format.
//    Converted the String value ' 0' to the UInt32 value 0.
//    Converted the String value '137' to the UInt32 value 137.
//    The String value '1601.9' is not in a recognizable format.
//    Converted the String value '2147483647' to the UInt32 value 2147483647.
Dim values() As String = { "One", "1.34e28", "-26.87", "-18", "-6.00", _
                           " 0", "137", "1601.9", Int32.MaxValue.ToString() }
Dim result As UInteger

For Each value As String In values
   Try
      result = Convert.ToUInt32(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        value.GetType().Name, value)
   Catch e As FormatException
      Console.WriteLine("The {0} value '{1}' is not in a recognizable format.", _
                        value.GetType().Name, value)
   End Try   
Next                                 
' The example displays the following output:
'    The String value 'One' is not in a recognizable format.
'    The String value '1.34e28' is not in a recognizable format.
'    The String value '-26.87' is not in a recognizable format.
'    The String value -18 is outside the range of the UInt32 type.
'    The String value '-6.00' is not in a recognizable format.
'    Converted the String value ' 0' to the UInt32 value 0.
'    Converted the String value '137' to the UInt32 value 137.
'    The String value '1601.9' is not in a recognizable format.
'    Converted the String value '2147483647' to the UInt32 value 2147483647.

注解

使用 ToUInt32(String) 方法等效于传递 valueUInt32.Parse(String) 方法。Using the ToUInt32(String) method is equivalent to passing value to the UInt32.Parse(String) method. 使用当前线程区域性的格式设置约定解释 valuevalue is interpreted by using the formatting conventions of the current thread culture.

如果你不希望在转换失败时处理异常,则可以改为调用 UInt32.TryParse 方法。If you prefer not to handle an exception if the conversion fails, you can call the UInt32.TryParse method instead. 它将返回一个 Boolean 值,该值指示转换是成功还是失败。It returns a Boolean value that indicates whether the conversion succeeded or failed.

适用于

ToUInt32(SByte)

重要

此 API 不符合 CLS。

将指定的 8 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 8-bit signed integer to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::SByte value);
public static uint ToUInt32 (sbyte value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (sbyte value);
static member ToUInt32 : sbyte -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : sbyte -> uint32
Public Shared Function ToUInt32 (value As SByte) As UInteger

参数

value
SByte

要转换的 8 位带符号整数。The 8-bit signed integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

例外

value 小于零。value is less than zero.

示例

下面的示例尝试将有符号字节数组中的每个元素转换为无符号整数。The following example attempts to convert each element in a signed byte array to an unsigned integer.

sbyte[] numbers = { SByte.MinValue, -1, 0, 10, SByte.MaxValue };
uint result;

foreach (sbyte number in numbers)
{
   try {
      result = Convert.ToUInt32(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The SByte value -128 is outside the range of the UInt32 type.
//    The SByte value -1 is outside the range of the UInt32 type.
//    Converted the SByte value 0 to the UInt32 value 0.
//    Converted the SByte value 10 to the UInt32 value 10.
//    Converted the SByte value 127 to the UInt32 value 127.
Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As UInteger

For Each number As SByte In numbers
   Try
      result = Convert.ToUInt32(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        number.GetType().Name, number)         
   End Try
Next
' The example displays the following output:
'    The SByte value -128 is outside the range of the UInt32 type.
'    The SByte value -1 is outside the range of the UInt32 type.
'    Converted the SByte value 0 to the UInt32 value 0.
'    Converted the SByte value 10 to the UInt32 value 10.
'    Converted the SByte value 127 to the UInt32 value 127.

适用于

ToUInt32(Byte)

重要

此 API 不符合 CLS。

将指定的 8 位无符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 8-bit unsigned integer to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::Byte value);
public static uint ToUInt32 (byte value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (byte value);
static member ToUInt32 : byte -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : byte -> uint32
Public Shared Function ToUInt32 (value As Byte) As UInteger

参数

value
Byte

要转换的 8 位无符号整数。The 8-bit unsigned integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

示例

下面的示例将字节数组中的每个元素转换为无符号整数。The following example converts each element in a byte array to an unsigned integer.

byte[] bytes = { Byte.MinValue, 14, 122, Byte.MaxValue};
uint result;

foreach (byte byteValue in bytes)
{
   result = Convert.ToUInt32(byteValue);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                     byteValue.GetType().Name, byteValue,
                     result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Byte value 0 to the UInt32 value 0.
//    Converted the Byte value 14 to the UInt32 value 14.
//    Converted the Byte value 122 to the UInt32 value 122.
//    Converted the Byte value 255 to the UInt32 value 255.
Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As UInteger

For Each byteValue As Byte In bytes
   result = Convert.ToUInt32(byteValue)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                     byteValue.GetType().Name, byteValue, _
                     result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Byte value 0 to the UInt32 value 0.
'    Converted the Byte value 14 to the UInt32 value 14.
'    Converted the Byte value 122 to the UInt32 value 122.
'    Converted the Byte value 255 to the UInt32 value 255.

适用于

ToUInt32(Int64)

重要

此 API 不符合 CLS。

将指定的 64 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 64-bit signed integer to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(long value);
public static uint ToUInt32 (long value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (long value);
static member ToUInt32 : int64 -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : int64 -> uint32
Public Shared Function ToUInt32 (value As Long) As UInteger

参数

value
Int64

要转换的 64 位带符号整数。The 64-bit signed integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

例外

value 小于零或大于 MaxValuevalue is less than zero or greater than MaxValue.

示例

下面的示例尝试将长整数数组中的每个元素转换为无符号整数。The following example attempts to convert each element in a long integer array to an unsigned integer.

long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
uint result;
foreach (long number in numbers)
{
   try {
      result = Convert.ToUInt32(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt32 type.
//    The Int64 value -1 is outside the range of the UInt32 type.
//    Converted the Int64 value 0 to the UInt32 value 0.
//    Converted the Int64 value 121 to the UInt32 value 121.
//    Converted the Int64 value 340 to the UInt32 value 340.
//    The Int64 value 9223372036854775807 is outside the range of the UInt32 type.
Dim numbers() As Long = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue }
Dim result As UInteger
For Each number As Long In numbers
   Try
      result = Convert.ToUInt32(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int64 value -9223372036854775808 is outside the range of the UInt32 type.
'    The Int64 value -1 is outside the range of the UInt32 type.
'    Converted the Int64 value 0 to the UInt32 value 0.
'    Converted the Int64 value 121 to the UInt32 value 121.
'    Converted the Int64 value 340 to the UInt32 value 340.
'    The Int64 value 9223372036854775807 is outside the range of the UInt32 type.

适用于

ToUInt32(Int32)

重要

此 API 不符合 CLS。

将指定的 32 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 32-bit signed integer to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(int value);
public static uint ToUInt32 (int value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (int value);
static member ToUInt32 : int -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : int -> uint32
Public Shared Function ToUInt32 (value As Integer) As UInteger

参数

value
Int32

要转换的 32 位带符号整数。The 32-bit signed integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

例外

value 小于零。value is less than zero.

示例

下面的示例尝试将整数数组中的每个元素转换为无符号整数。The following example attempts to convert each element in an integer array to an unsigned integer.

int[] numbers = { Int32.MinValue, -1203, 0, 121, 1340, Int32.MaxValue };
uint result;
foreach (int number in numbers)
{
   try {
      result = Convert.ToUInt32(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt32 type.
//    The Int32 value -1203 is outside the range of the UInt32 type.
//    Converted the Int32 value 0 to the UInt32 value 0.
//    Converted the Int32 value 121 to the UInt32 value 121.
//    Converted the Int32 value 1340 to the UInt32 value 1340.
//    Converted the Int32 value 2147483647 to the UInt32 value 2147483647.
Dim numbers() As Integer = { Int32.MinValue, -1203, 0, 121, 1340, Int32.MaxValue }
Dim result As UInteger
For Each number As Integer In numbers
   Try
      result = Convert.ToUInt32(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int32 value -2147483648 is outside the range of the UInt32 type.
'    The Int32 value -1203 is outside the range of the UInt32 type.
'    Converted the Int32 value 0 to the UInt32 value 0.
'    Converted the Int32 value 121 to the UInt32 value 121.
'    Converted the Int32 value 1340 to the UInt32 value 1340.
'    Converted the Int32 value 2147483647 to the UInt32 value 2147483647.

适用于

ToUInt32(Int16)

重要

此 API 不符合 CLS。

将指定的 16 位有符号整数的值转换为等效的 32 位无符号整数。Converts the value of the specified 16-bit signed integer to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(short value);
public static uint ToUInt32 (short value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (short value);
static member ToUInt32 : int16 -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : int16 -> uint32
Public Shared Function ToUInt32 (value As Short) As UInteger

参数

value
Int16

要转换的 16 位带符号整数。The 16-bit signed integer to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

例外

value 小于零。value is less than zero.

示例

下面的示例尝试将16位整数数组中的每个元素转换为无符号整数。The following example attempts to convert each element in a 16-bit integer array to an unsigned integer.

short[] numbers= { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue };
uint result;

foreach (short number in numbers)
{
   try {
      result = Convert.ToUInt32(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                           number.GetType().Name, number,
                           result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the UInt32 type.
//    The Int16 value -1 is outside the range of the UInt32 type.
//    Converted the Int16 value 0 to the UInt32 value 0.
//    Converted the Int16 value 121 to the UInt32 value 121.
//    Converted the Int16 value 340 to the UInt32 value 340.
//    Converted the Int16 value 32767 to the UInt32 value 32767.
Dim numbers() As Short = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue }
Dim result As UInteger

For Each number As Short In numbers
   Try
      result = Convert.ToUInt32(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                           number.GetType().Name, number, _
                           result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        number.GetType().Name, number) 
   End Try
Next
' The example displays the following output:
'    The Int16 value -32768 is outside the range of the UInt32 type.
'    The Int16 value -1 is outside the range of the UInt32 type.
'    Converted the Int16 value 0 to the UInt32 value 0.
'    Converted the Int16 value 121 to the UInt32 value 121.
'    Converted the Int16 value 340 to the UInt32 value 340.
'    Converted the Int16 value 32767 to the UInt32 value 32767.

适用于

ToUInt32(Double)

重要

此 API 不符合 CLS。

将指定的双精度浮点数的值转换为等效的 32 位无符号整数。Converts the value of the specified double-precision floating-point number to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(double value);
public static uint ToUInt32 (double value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (double value);
static member ToUInt32 : double -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : double -> uint32
Public Shared Function ToUInt32 (value As Double) As UInteger

参数

value
Double

要转换的双精度浮点数。The double-precision floating-point number to convert.

返回

UInt32

value,舍入为最接近的 32 位无符号整数。value, rounded to the nearest 32-bit unsigned integer. 如果 value 为两个整数中间的数字,则返回二者中的偶数;即 4.5 转换为 4,而 5.5 转换为 6。If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

属性

例外

value 小于零或大于 MaxValuevalue is less than zero or greater than MaxValue.

示例

下面的示例尝试将值数组中的每个元素转换 Double 为无符号整数。The following example attempts to convert each element in an array of Double values to an unsigned integer.

double[] values= { Double.MinValue, -1.38e10, -1023.299, -12.98,
                   0, 9.113e-16, 103.919, 17834.191, Double.MaxValue };
uint result;

foreach (double value in values)
{
   try {
      result = Convert.ToUInt32(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    The Double value -1.79769313486232E+308 is outside the range of the UInt32 type.
//    The Double value -13800000000 is outside the range of the UInt32 type.
//    The Double value -1023.299 is outside the range of the UInt32 type.
//    The Double value -12.98 is outside the range of the UInt32 type.
//    Converted the Double value '0' to the UInt32 value 0.
//    Converted the Double value '9.113E-16' to the UInt32 value 0.
//    Converted the Double value '103.919' to the UInt32 value 104.
//    Converted the Double value '17834.191' to the UInt32 value 17834.
//    The Double value 1.79769313486232E+308 is outside the range of the UInt32 type.
Dim values() As Double = { Double.MinValue, -1.38e10, -1023.299, -12.98, _
                           0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }
Dim result As UInteger

For Each value As Double In values
   Try
      result = Convert.ToUInt32(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        value.GetType().Name, value)
   End Try   
Next         
' The example displays the following output:                        
'    The Double value -1.79769313486232E+308 is outside the range of the UInt32 type.
'    The Double value -13800000000 is outside the range of the UInt32 type.
'    The Double value -1023.299 is outside the range of the UInt32 type.
'    The Double value -12.98 is outside the range of the UInt32 type.
'    Converted the Double value '0' to the UInt32 value 0.
'    Converted the Double value '9.113E-16' to the UInt32 value 0.
'    Converted the Double value '103.919' to the UInt32 value 104.
'    Converted the Double value '17834.191' to the UInt32 value 17834.
'    The Double value 1.79769313486232E+308 is outside the range of the UInt32 type.

另请参阅

适用于

ToUInt32(Decimal)

重要

此 API 不符合 CLS。

将指定的十进制数的值转换为等效的 32 位无符号整数。Converts the value of the specified decimal number to an equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::Decimal value);
public static uint ToUInt32 (decimal value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (decimal value);
static member ToUInt32 : decimal -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : decimal -> uint32
Public Shared Function ToUInt32 (value As Decimal) As UInteger

参数

value
Decimal

要转换的十进制数。The decimal number to convert.

返回

UInt32

value,舍入为最接近的 32 位无符号整数。value, rounded to the nearest 32-bit unsigned integer. 如果 value 为两个整数中间的数字,则返回二者中的偶数;即 4.5 转换为 4,而 5.5 转换为 6。If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

属性

例外

value 小于零或大于 MaxValuevalue is less than zero or greater than MaxValue.

示例

下面的示例尝试将值数组中的每个元素转换 Decimal 为无符号整数。The following example attempts to convert each element in an array of Decimal values to an unsigned integer.

decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
                    199.55m, 9214.16m, Decimal.MaxValue };
uint result;

foreach (decimal value in values)
{
   try {
      result = Convert.ToUInt32(value);
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    The Decimal value -79228162514264337593543950335 is outside the range of the UInt32 type.
//    The Decimal value -1034.23 is outside the range of the UInt32 type.
//    The Decimal value -12 is outside the range of the UInt32 type.
//    Converted the Decimal value '0' to the UInt32 value 0.
//    Converted the Decimal value '147' to the UInt32 value 147.
//    Converted the Decimal value '199.55' to the UInt32 value 200.
//    Converted the Decimal value '9214.16' to the UInt32 value 9214.
//    The Decimal value 79228162514264337593543950335 is outside the range of the UInt32 type.
Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                            199.55d, 9214.16d, Decimal.MaxValue }
Dim result As UInteger

For Each value As Decimal In values
   Try
      result = Convert.ToUInt32(value)
      Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("{0} is outside the range of the UInt32 type.", _
                        value)
   End Try   
Next                                  
' The example displays the following output:
'    -79228162514264337593543950335 is outside the range of the UInt32 type.
'    -1034.23 is outside the range of the UInt32 type.
'    -12 is outside the range of the UInt32 type.
'    Converted the Decimal value '0' to the UInt32 value 0.
'    Converted the Decimal value '147' to the UInt32 value 147.
'    Converted the Decimal value '199.55' to the UInt32 value 200.
'    Converted the Decimal value '9214.16' to the UInt32 value 9214.
'    79228162514264337593543950335 is outside the range of the UInt32 type.

另请参阅

适用于

ToUInt32(DateTime)

重要

此 API 不符合 CLS。

调用此方法始终引发 InvalidCastExceptionCalling this method always throws InvalidCastException.

public:
 static System::UInt32 ToUInt32(DateTime value);
public static uint ToUInt32 (DateTime value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (DateTime value);
static member ToUInt32 : DateTime -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : DateTime -> uint32
Public Shared Function ToUInt32 (value As DateTime) As UInteger

参数

value
DateTime

要转换的日期和时间值。The date and time value to convert.

返回

UInt32

不支持此转换。This conversion is not supported. 不返回任何值。No value is returned.

属性

例外

不支持此转换。This conversion is not supported.

适用于

ToUInt32(Char)

重要

此 API 不符合 CLS。

将指定 Unicode 字符的值转换为等效的 32 位无符号整数。Converts the value of the specified Unicode character to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(char value);
public static uint ToUInt32 (char value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (char value);
static member ToUInt32 : char -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : char -> uint32
Public Shared Function ToUInt32 (value As Char) As UInteger

参数

value
Char

要转换的 Unicode 字符。The Unicode character to convert.

返回

UInt32

一个与 value 等效的 32 位无符号整数。A 32-bit unsigned integer that is equivalent to value.

属性

示例

下面的示例将字符数组中的每个元素转换为无符号整数。The following example converts each element in a character array to an unsigned integer.

char[] chars = { 'a', 'z', '\u0007', '\u03FF',
                 '\u7FFF', '\uFFFE' };
uint result;

foreach (char ch in chars)
{
   result = Convert.ToUInt32(ch);
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                     ch.GetType().Name, ch,
                     result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Char value 'a' to the UInt32 value 97.
//    Converted the Char value 'z' to the UInt32 value 122.
//    Converted the Char value '' to the UInt32 value 7.
//    Converted the Char value '?' to the UInt32 value 1023.
//    Converted the Char value '?' to the UInt32 value 32767.
//    Converted the Char value '?' to the UInt32 value 65534.
Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
                        ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As UInteger
                        
For Each ch As Char in chars
   result = Convert.ToUInt32(ch)
   Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                     ch.GetType().Name, ch, _
                     result.GetType().Name, result)
Next   
' The example displays the following output:
'    Converted the Char value 'a' to the UInt32 value 97.
'    Converted the Char value 'z' to the UInt32 value 122.
'    Converted the Char value '' to the UInt32 value 7.
'    Converted the Char value '?' to the UInt32 value 1023.
'    Converted the Char value '?' to the UInt32 value 32767.
'    Converted the Char value '?' to the UInt32 value 65534.

适用于

ToUInt32(Boolean)

重要

此 API 不符合 CLS。

将指定的布尔值转换为等效的 32 位无符号整数。Converts the specified Boolean value to the equivalent 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(bool value);
public static uint ToUInt32 (bool value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (bool value);
static member ToUInt32 : bool -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : bool -> uint32
Public Shared Function ToUInt32 (value As Boolean) As UInteger

参数

value
Boolean

要转换的布尔值。The Boolean value to convert.

返回

UInt32

如果 valuetrue,则为数字 1;否则,为 0。The number 1 if value is true; otherwise, 0.

属性

示例

下面的示例将布尔值 true 和转换 false 为无符号整数。The following example converts the Boolean values true and false to unsigned integers.

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine("{0} converts to {1}.", falseFlag,
                  Convert.ToUInt32(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
                  Convert.ToUInt32(trueFlag));
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.
Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine("{0} converts to {1}.", falseFlag, _
                  Convert.ToUInt32(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
                  Convert.ToUInt32(trueFlag))
' The example displays the following output:
'       False converts to 0.
'       True converts to 1.

适用于

ToUInt32(Object)

重要

此 API 不符合 CLS。

将指定对象的值转换为 32 位无符号整数。Converts the value of the specified object to a 32-bit unsigned integer.

public:
 static System::UInt32 ToUInt32(System::Object ^ value);
public static uint ToUInt32 (object value);
[System.CLSCompliant(false)]
public static uint ToUInt32 (object value);
static member ToUInt32 : obj -> uint32
[<System.CLSCompliant(false)>]
static member ToUInt32 : obj -> uint32
Public Shared Function ToUInt32 (value As Object) As UInteger

参数

value
Object

用于实现 IConvertible 接口的对象,或为 nullAn object that implements the IConvertible interface, or null.

返回

UInt32

一个等效于 value 的 32 位无符号整数,如果 valuenull,则为 0(零)。A 32-bit unsigned integer that is equivalent to value, or 0 (zero) if value is null.

属性

例外

value 的格式不正确。value is not in an appropriate format.

value 不实现 IConvertible 接口。value does not implement the IConvertible interface.

- 或 --or-

不支持该转换。The conversion is not supported.

value 表示一个小于 MinValue 或大于 MaxValue 的数字。value represents a number that is less than MinValue or greater than MaxValue.

示例

下面的示例尝试将对象数组中的每个元素转换为无符号整数。The following example attempts to convert each element in an object array to an unsigned integer.

object[] values = { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
                    "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2, 16.3e42};
uint result;

foreach (object value in values)
{
   try {
      result = Convert.ToUInt32(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value '{1}' is outside the range of the UInt32 type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a UInt32 exists for the {0} value '{1}'.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value True to the UInt32 value 1.
//    The Int32 value '-12' is outside the range of the UInt32 type.
//    Converted the Int32 value 163 to the UInt32 value 163.
//    Converted the Int32 value 935 to the UInt32 value 935.
//    Converted the Char value x to the UInt32 value 120.
//    No conversion to a UInt32 exists for the DateTime value '5/12/2009 12:00:00 AM'.
//    Converted the String value 104 to the UInt32 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value '-1' is outside the range of the UInt32 type.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value 100 to the UInt32 value 100.
//    The Double value '1.63E+43' is outside the range of the UInt32 type.
Dim values() As Object = { True, -12, 163, 935, "x"c, #5/12/2009#, _
                           "104", "103.0", "-1", _
                           "1.00e2", "One", 1.00e2, 16.3e42}
Dim result As UInteger

For Each value As Object In values
   Try
      result = Convert.ToUInt32(value)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the UInt32 type.", _
                        value.GetType().Name, value)
   Catch e As FormatException
      Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
                        value.GetType().Name, value)
   Catch e As InvalidCastException
      Console.WriteLine("No conversion to a UInt32 exists for the {0} value {1}.", _
                        value.GetType().Name, value)
                        
   End Try
Next                           
' The example displays the following output:
'    Converted the Boolean value True to the UInt32 value 1.
'    The Int32 value -12 is outside the range of the UInt32 type.
'    Converted the Int32 value 163 to the UInt32 value 163.
'    Converted the Int32 value 935 to the UInt32 value 935.
'    Converted the Char value x to the UInt32 value 120.
'    No conversion to a UInt32 exists for the DateTime value 5/12/2009 12:00:00 AM.
'    Converted the String value 104 to the UInt32 value 104.
'    The String value 103.0 is not in a recognizable format.
'    The String value -1 is outside the range of the UInt32 type.
'    The String value 1.00e2 is not in a recognizable format.
'    The String value One is not in a recognizable format.
'    Converted the Double value 100 to the UInt32 value 100.
'    The Double value 1.63E+43 is outside the range of the UInt32 type.

注解

返回值是调用的 IConvertible.ToUInt32 基础类型的方法的结果 valueThe return value is the result of invoking the IConvertible.ToUInt32 method of the underlying type of value.

适用于