Convert.ToUInt64 方法

參考

定義

命名空間:: System

組件:: System.Runtime.Extensions.dll

組件:: System.Runtime.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

將指定的值轉換為 64 位元不帶正負號的整數。

多載

ToUInt64(String)	將指定之數字的字串表示，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(UInt16)	將指定的 16 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(UInt32)	將指定的 32 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。
ToUInt64(String, IFormatProvider)	使用指定之特定文化特性格式資訊，將指定之數字的字串表示轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(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 64 位元不帶正負號的整數。
ToUInt64(Single)	將指定之單精確度浮點數的值，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(String, Int32)	將指定基底中數字的字串表示，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(UInt64)	傳回指定的 64 位元不帶正負號整數；不會執行實際的轉換。
ToUInt64(SByte)	將指定的 8 位元帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。
ToUInt64(Int16)	將指定的 16 位元帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。
ToUInt64(Int64)	將指定的 64 位元帶正負號的整數值轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Int32)	將指定的 32 位元帶正負號的整數值轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Double)	將指定之雙精確度浮點數的值，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Decimal)	將指定之十進位數字的值，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(DateTime)	呼叫這個方法一律會擲回 InvalidCastException。
ToUInt64(Char)	將指定的 Unicode 字元值轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Byte)	將指定的 8 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Boolean)	將指定的布林值轉換為相等的 64 位元不帶正負號的整數。
ToUInt64(Object)	將指定之物件的值轉換為 64 位元不帶正負號的整數。

ToUInt64(String)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定之數字的字串表示，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::String ^ value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string -> uint64

Public Shared Function ToUInt64 (value As String) As ULong

參數

value: String

字串，包含要轉換的數字。

傳回

UInt64

與 value 中之數字相等的 64 位元帶正負號的整數；如果 value 為 null，則為 0 (零)。

屬性: CLSCompliantAttribute

例外狀況

FormatException

value 不是由後面接著一連串數字 (0 到 9) 的任意符號所組成。

OverflowException

value 代表小於 UInt64.MinValue 或大於 UInt64.MaxValue 的數位。

範例

下列範例會將字串數位的專案解譯為數值字串，並嘗試將它們轉換成不帶正負號的長整數。

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

foreach (string value in values)
{
   try {
      result = Convert.ToUInt64(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("{0} is outside the range of the UInt64 type.", 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.
//    -18 is outside the range of the UInt64 type.
//    The String value '-6.00' is not in a recognizable format.
//    Converted the String value ' 0' to the UInt64 value 0.
//    Converted the String value '137' to the UInt64 value 137.
//    The String value '1601.9' is not in a recognizable format.
//    Converted the String value '2147483647' to the UInt64 value 2147483647.

let values =
    [| "1603"; "1,603"; "one"; "1.6e03"
       "1.2e-02"; "-1326"; "1074122" |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? OverflowException ->
        printfn $"{value} is outside the range of the UInt64 type." 
// The example displays the following output:
//    Converted the String value '1603' to the UInt64 value 1603.
//    The String value 1,603 is not in a recognizable format.
//    The String value one is not in a recognizable format.
//    The String value 1.6e03 is not in a recognizable format.
//    The String value 1.2e-02 is not in a recognizable format.
//    -1326 is outside the range of the UInt64 type.
//    1074122 is outside the range of the UInt64 type.

Dim values() As String = { "One", "1.34e28", "-26.87", "-18", "-6.00", _
                           " 0", "137", "1601.9", Int32.MaxValue.ToString() }
Dim result As ULong

For Each value As String In values
   Try
      result = Convert.ToUInt64(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 UInt64 type.", 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.
'    -18 is outside the range of the UInt64 type.
'    The String value '-6.00' is not in a recognizable format.
'    Converted the String value ' 0' to the UInt64 value 0.
'    Converted the String value '137' to the UInt64 value 137.
'    The String value '1601.9' is not in a recognizable format.
'    Converted the String value '2147483647' to the UInt64 value 2147483647.

備註

ToInt64(String)使用方法相當於傳遞value至 Int64.Parse(String) 方法。 value 會使用目前文化特性的格式化慣例來解譯。

如果您不想在轉換失敗時處理例外狀況，您可以改為呼叫 UInt64.TryParse 方法。它會傳回值 Boolean ，指出轉換成功或失敗。

適用於

ToUInt64(UInt16)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 16 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::UInt16 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (ushort value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint16 -> uint64

Public Shared Function ToUInt64 (value As UShort) As ULong

參數

value: UInt16

要轉換之 16 位元不帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

範例

下列範例會將不帶正負號 16 位整數陣列中的每個元素轉換成不帶正負號的長整數。

ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
ulong result;

foreach (ushort number in numbers)
{
   try {
      result = Convert.ToUInt64(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 UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the UInt64 value 0.
//    Converted the UInt16 value 121 to the UInt64 value 121.
//    Converted the UInt16 value 340 to the UInt64 value 340.
//    Converted the UInt16 value 65535 to the UInt64 value 65535.

let numbers = [| UInt16.MinValue; 121us; 340us; UInt16.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
                        
// The example displays the following output:
//    Converted the UInt16 value '0' to the UInt64 value 0.
//    Converted the UInt16 value '121' to the UInt64 value 121.
//    Converted the UInt16 value '340' to the UInt64 value 340.
//    The UInt16 value 65535 is outside the range of the UInt64 type.

Dim numbers() As UShort = { UInt16.MinValue, 121, 340, UInt16.MaxValue }
Dim result As ULong

For Each number As UShort In numbers
   result = Convert.ToUInt64(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 UInt64 value 0.
'    Converted the UInt16 value 121 to the UInt64 value 121.
'    Converted the UInt16 value 340 to the UInt64 value 340.
'    Converted the UInt16 value 65535 to the UInt64 value 65535.

適用於

ToUInt64(UInt32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 32 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。

public:
 static System::UInt64 ToUInt64(System::UInt32 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (uint value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint32 -> uint64

Public Shared Function ToUInt64 (value As UInteger) As ULong

參數

value: UInt32

要轉換之 32 位元不帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

範例

下列範例會將不帶正負號整數陣列中的每個項目轉換成不帶正負號的長整數。

uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
ulong result;

foreach (uint number in numbers)
{
   try {
      result = Convert.ToUInt64(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 UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the UInt64 value 0.
//    Converted the UInt32 value 121 to the UInt64 value 121.
//    Converted the UInt32 value 340 to the UInt64 value 340.
//    Converted the UInt32 value 4294967295 to the UInt64 value 4294967295.

let numbers = [| UInt32.MinValue; 121u; 340u; UInt32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    Converted the UInt32 value '0' to the UInt64 value 0.
//    Converted the UInt64 value '121' to the UInt64 value 121.
//    Converted the UInt64 value '340' to the UInt64 value 340.
//    The UInt32 value 4294967295 is outside the range of the UInt64 type.

Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue }
Dim result As ULong

For Each number As UInteger In numbers
   result = Convert.ToUInt64(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 UInt64 value 0.
'    Converted the UInt32 value 121 to the UInt64 value 121.
'    Converted the UInt32 value 340 to the UInt64 value 340.
'    Converted the UInt32 value 4294967295 to the UInt64 value 4294967295.

適用於

ToUInt64(String, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

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，將指定之數字的字串表示轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::String ^ value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string * IFormatProvider -> uint64

Public Shared Function ToUInt64 (value As String, provider As IFormatProvider) As ULong

參數

value: String

字串，包含要轉換的數字。

provider: IFormatProvider

物件，提供特定文化特性格式資訊。

傳回

UInt64

與 value 中之數字相等的 64 位元不帶正負號的整數；如果 value 為 null，則為 0 (零)。

屬性: CLSCompliantAttribute

例外狀況

FormatException

value 不是由後面接著一連串數字 (0 到 9) 的任意符號所組成。

OverflowException

value 代表小於 UInt64.MinValue 或大於 UInt64.MaxValue 的數位。

範例

下列範例會定義自定義 NumberFormatInfo 物件，將字串「pos」辨識為正負號，並將字串「neg」定義為負號。然後，它會嘗試將數值字串數位的每個元素轉換成不帶正負號的長整數。轉換會使用自定義提供者和 NumberFormatInfo 不因文化特性而異的提供者。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set several properties.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.PositiveSign = "pos ";
      provider.NegativeSign = "neg ";

      // Define an array of numeric strings.
      string[] values = { "123456789012", "+123456789012",
                          "pos 123456789012", "123456789012.",
                          "123,456,789,012", "18446744073709551615",
                          "18446744073709551616", "neg 1", "-1" };
      //  Convert the strings using the format provider.
      foreach (string value in values)
      {
         Console.Write("{0,-20}  -->  ", value);
         try {
            Console.WriteLine("{0,20}", Convert.ToUInt64(value, provider));
         }
         catch (FormatException) {
            Console.WriteLine("{0,20}", "Invalid Format");
         }
         catch (OverflowException) {
            Console.WriteLine("{0,20}", "Numeric Overflow");
         }
      }
   }
}
// The example displays the following output:
//    123456789012          -->          123456789012
//    +123456789012         -->        Invalid Format
//    pos 123456789012      -->          123456789012
//    123456789012.         -->        Invalid Format
//    123,456,789,012       -->        Invalid Format
//    18446744073709551615  -->  18446744073709551615
//    18446744073709551616  -->      Numeric Overflow
//    neg 1                 -->      Numeric Overflow
//    -1                    -->        Invalid Format

open System
open System.Globalization

// Create a NumberFormatInfo object and set several properties.
let provider = NumberFormatInfo()
provider.PositiveSign <- "pos "
provider.NegativeSign <- "neg "

// Define an array of numeric strings.
let values =
    [| "123456789012"; "+123456789012"
       "pos 123456789012"; "123456789012."
       "123,456,789,012"; "18446744073709551615"
       "18446744073709551616"; "neg 1"; "-1" |]

// Convert the strings using the format provider.
for value in values do
    printf $"{value,-20}  -->  "
    try
        printfn $"{Convert.ToUInt64(value, provider),20}"
    with
    | :? FormatException ->
        printfn "%20s" "Invalid Format"
    | :? OverflowException ->
        printfn "%20s" "Numeric Overflow"
// The example displays the following output:
//    123456789012          -->          123456789012
//    +123456789012         -->        Invalid Format
//    pos 123456789012      -->          123456789012
//    123456789012.         -->        Invalid Format
//    123,456,789,012       -->        Invalid Format
//    18446744073709551615  -->  18446744073709551615
//    18446744073709551616  -->      Numeric Overflow
//    neg 1                 -->      Numeric Overflow
//    -1                    -->        Invalid Format

Imports System.Globalization

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

      ' Define an array of numeric strings.
      Dim values() As String = { "123456789012", "+123456789012", _
                                 "pos 123456789012", "123456789012.", _
                                 "123,456,789,012", "18446744073709551615", _
                                 "18446744073709551616", "neg 1", "-1" }
      '  Convert the strings using the format provider.
      For Each value As String In values
         Console.Write("{0,-20}  -->  ", value)
         Try
            Console.WriteLine("{0,20}", Convert.ToUInt64(value, provider))
         Catch e As FormatException
            Console.WriteLine("{0,20}", "Invalid Format")
         Catch e As OverflowException
            Console.WriteLine("{0,20}", "Numeric Overflow")
         End Try               
      Next
    End Sub 
End Module 
' The example displays the following output:
'    123456789012          -->          123456789012
'    +123456789012         -->        Invalid Format
'    pos 123456789012      -->          123456789012
'    123456789012.         -->        Invalid Format
'    123,456,789,012       -->        Invalid Format
'    18446744073709551615  -->  18446744073709551615
'    18446744073709551616  -->      Numeric Overflow
'    neg 1                 -->      Numeric Overflow
'    -1                    -->        Invalid Format

備註

傳回值是在上value叫用 UInt64.Parse 的結果。

provider 是取得 IFormatProvider 對象的實作 NumberFormatInfo 。物件 NumberFormatInfo 提供有關格式 value的文化特性特定資訊。如果為 providernull，則會 NumberFormatInfo 使用目前文化特性的物件。

如果您不想在轉換失敗時處理例外狀況，您可以改為呼叫 UInt64.TryParse 方法。它會傳回值 Boolean ，指出轉換成功或失敗。

適用於

ToUInt64(Object, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

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，將指定之物件的值轉換為 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::Object ^ value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object? value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToUInt64 : obj * IFormatProvider -> uint64

Public Shared Function ToUInt64 (value As Object, provider As IFormatProvider) As ULong

參數

value: Object

實作 IConvertible 介面的物件。

provider: IFormatProvider

物件，提供特定文化特性格式資訊。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數；如果 value 為 null，則為零。

屬性: CLSCompliantAttribute

例外狀況

FormatException

value 的格式不正確。

InvalidCastException

value 未實作 IConvertible 介面。

-或-

不支援轉換。

OverflowException

value 代表小於 UInt64.MinValue 或大於 UInt64.MaxValue 的數位。

範例

下列範例會定義實 HexString 作介面的 IConvertible 類別，其設計目的是要保存 64 位帶正負號和 64 位不帶正負號值的字串表示。類別包含 Sign 屬性，指出其十六進位值的正負號。

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 > 16)
            throw new ArgumentException("The hexadecimal representation of a 64-bit integer cannot have more than 16 characters.");
         else if (! Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase))
            throw new ArgumentException("The hexadecimal representation of a 64-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.ToInt64(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.ToUInt64(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.ToInt64(hexString, 16)));

      try {
         ushort codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber);
         return Convert.ToChar(codePoint);
      }
      catch (OverflowException) {
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToUInt64(hexString, 16)));
      }
   }

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

   public decimal ToDecimal(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
      {
         long hexValue = Int64.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
      else
      {
         ulong hexValue = UInt64.Parse(hexString, NumberStyles.HexNumber);
         return Convert.ToDecimal(hexValue);
      }
   }

   public double ToDouble(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToDouble(Int64.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToDouble(UInt64.Parse(hexString, NumberStyles.HexNumber));
   }

   public short ToInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToInt16(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt64(hexString, 16)), e);
         }
      else
         try {
            return Convert.ToInt16(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public int ToInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToInt32(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e);
         }
      else
         try {
            return Convert.ToInt32(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public long ToInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Int64.Parse(hexString, NumberStyles.HexNumber);
      else
         try {
            return Convert.ToInt64(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the Int64 type.", Convert.ToUInt64(hexString, 16)), e);
         }
   }

   public sbyte ToSByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         try {
            return Convert.ToSByte(Int64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                      Int64.Parse(hexString, NumberStyles.HexNumber), e));
         }
      else
         try {
            return Convert.ToSByte(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                    UInt64.Parse(hexString, NumberStyles.HexNumber)), e);
         }
   }

   public float ToSingle(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToSingle(Int64.Parse(hexString, NumberStyles.HexNumber));
      else
         return Convert.ToSingle(UInt64.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.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         try {
            return Convert.ToUInt16(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException e) {
            throw new OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt64(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.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         try {
            return Convert.ToUInt32(UInt64.Parse(hexString, NumberStyles.HexNumber));
         }
         catch (OverflowException) {
            throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                      UInt64.Parse(hexString, NumberStyles.HexNumber)));
         }
   }

   public ulong ToUInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt64(hexString, 16);
   }
}

open System
open System.Globalization
open System.Text.RegularExpressions

type SignBit =
    | Negative = -1
    | Zero = 0
    | Positive = 1

[<Struct>]
type HexString =
    val mutable private hexString: string

    val mutable Sign: SignBit

    member this.Value
        with get () = this.hexString
        and set (value: string) =
            if value.Trim().Length > 16 then
                invalidArg "value" "The hexadecimal representation of a 64-bit integer cannot have more than 16 characters."
            elif Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) |> not then
                invalidArg "value" "The hexadecimal representation of a 64-bit integer contains invalid characters."
            else
                this.hexString <- value

    // IConvertible implementations.
    interface IConvertible with
        member _.GetTypeCode() =
            TypeCode.Object

        member this.ToBoolean(provider: IFormatProvider) =
            this.Sign <> SignBit.Zero

        member this.ToByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt64(this.hexString, 16)} is out of range of the Byte type.")
            try
                Byte.Parse(this.hexString, NumberStyles.HexNumber)
            with :? OverflowException as e ->
                raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Byte type.", e) )

        member this.ToChar(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Convert.ToInt64(this.hexString, 16)} is out of range of the Char type.")
            try
                let codePoint = UInt16.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToChar codePoint
            with :? OverflowException ->
                raise (OverflowException $"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Char type.")

        member this.ToDateTime(provider: IFormatProvider) =
            raise (InvalidCastException "Hexadecimal to DateTime conversion is not supported.")

        member this.ToDecimal(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                let hexValue = Int64.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue
            else
                let hexValue = UInt64.Parse(this.hexString, NumberStyles.HexNumber)
                Convert.ToDecimal hexValue

        member this.ToDouble(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToDouble(Int64.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToDouble(UInt64.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToInt16(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToInt64(this.hexString, 16)} is out of range of the Int16 type.", e) )
            else
                try
                    Convert.ToInt16(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int16 type.", e) )

        member this.ToInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToInt32(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int32 type.", e) )
            else
                try
                    Convert.ToInt32(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int32 type.", e) )

        member this.ToInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Int64.Parse(this.hexString, NumberStyles.HexNumber)
            else
                try
                    Convert.ToInt64(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the Int64 type.", e) )

        member this.ToSByte(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                try
                    Convert.ToSByte(Int64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )
            else
                try
                    Convert.ToSByte(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{UInt64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )

        member this.ToSingle(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                Convert.ToSingle(Int64.Parse(this.hexString, NumberStyles.HexNumber))
            else
                Convert.ToSingle(UInt64.Parse(this.hexString, NumberStyles.HexNumber))

        member this.ToString(provider: IFormatProvider) =
            "0x" + this.hexString

        member this.ToType(conversionType: Type, provider: IFormatProvider) =
            let this = this :> IConvertible
            match Type.GetTypeCode conversionType with
            | TypeCode.Boolean ->
                this.ToBoolean null
            | TypeCode.Byte ->
                this.ToByte null
            | TypeCode.Char ->
                this.ToChar null
            | TypeCode.DateTime ->
                this.ToDateTime null
            | TypeCode.Decimal ->
                this.ToDecimal null
            | TypeCode.Double ->
                this.ToDouble null
            | TypeCode.Int16 ->
                this.ToInt16 null
            | TypeCode.Int32 ->
                this.ToInt32 null
            | TypeCode.Int64 ->
                this.ToInt64 null
            | TypeCode.Object ->
                if typeof<HexString>.Equals conversionType then
                    this
                else
                    raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.")
            | TypeCode.SByte ->
                this.ToSByte null
            | TypeCode.Single ->
                this.ToSingle null
            | TypeCode.String ->
                this.ToString null
            | TypeCode.UInt16 ->
                this.ToUInt16 null
            | TypeCode.UInt32 ->
                this.ToUInt32 null
            | TypeCode.UInt64 ->
                this.ToUInt64 null
            | _ ->
                raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.")

        member this.ToUInt16(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt16 type.")
            else
                try
                    Convert.ToUInt16(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException as e ->
                    raise (OverflowException($"{Convert.ToUInt64(this.hexString, 16)} is out of range of the UInt16 type.", e) )

        member this.ToUInt32(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
            else
                try
                    Convert.ToUInt32(UInt64.Parse(this.hexString, NumberStyles.HexNumber))
                with :? OverflowException ->
                    raise (OverflowException $"{UInt64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")

        member this.ToUInt64(provider: IFormatProvider) =
            if this.Sign = SignBit.Negative then
                raise (OverflowException $"{Int64.Parse(this.hexString, NumberStyles.HexNumber)} is outside the range of the UInt64 type.")
            else
                Convert.ToUInt64(this.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 > 16 Then
            Throw New ArgumentException("The hexadecimal representation of a 64-bit integer cannot have more than 16 characters.")
         ElseIf Not Regex.IsMatch(value, "([0-9,A-F]){1,8}", RegexOptions.IgnoreCase) Then
            Throw New ArgumentException("The hexadecimal representation of a 64-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.ToInt64(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.ToUInt64(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.ToInt64(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.ToUInt64(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 Long = Int64.Parse(hexString, NumberStyles.HexNumber)
         Return Convert.ToDecimal(hexValue)
      Else
         Dim hexValue As ULong = UInt64.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(Int64.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToDouble(UInt64.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(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToInt64(hexString, 16)), e)
         End Try
      Else
         Try
            Return Convert.ToInt16(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int16 type.", Convert.ToUInt64(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
         Try
            Return Convert.ToInt32(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try
      Else
         Try
            Return Convert.ToInt32(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int32 type.", Convert.ToUInt64(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 Int64.Parse(hexString, NumberStyles.HexNumber)
      Else
         Try
            Return Convert.ToInt64(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the Int64 type.", Convert.ToUInt64(hexString, 16)), e)
         End Try
      End If   
   End Function
   
   Public Function ToSByte(provider As IFormatProvider) As SByte _
                   Implements IConvertible.ToSByte
      If signBit = SignBit.Negative Then
         Try
            Return Convert.ToSByte(Int64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                      Int64.Parse(hexString, NumberStyles.HexNumber), e))
         End Try
      Else
         Try
            Return Convert.ToSByte(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
                                                    UInt64.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(Int64.Parse(hexString, NumberStyles.HexNumber))
      Else
         Return Convert.ToSingle(UInt64.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.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Try
            Return Convert.ToUInt16(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
            Throw New OverflowException(String.Format("{0} is out of range of the UInt16 type.", Convert.ToUInt64(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.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Try
            Return Convert.ToUInt32(UInt64.Parse(hexString, NumberStyles.HexNumber))
         Catch e As OverflowException
         Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
                                                   UInt64.Parse(hexString, NumberStyles.HexNumber)))
         End Try   
      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.", _
                                                   Int64.Parse(hexString, NumberStyles.HexNumber)))
      Else
         Return Convert.ToUInt64(hexString, 16)
      End If   
   End Function
End Structure

下列範例顯示 ToUInt64(Object, IFormatProvider) 呼叫將對象當做參數傳遞 HexString 的方法，接著會呼叫 IConvertible.ToUInt64 類別的實作 HexString 。

public class Example
{
   public static void Main()
   {
      ulong positiveValue = UInt64.MaxValue - 100000;
      long negativeValue = -1;

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

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

      try {
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt64(positiveString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt64 type.",
                           Int64.Parse(positiveString.Value, NumberStyles.HexNumber));
      }

      try {
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt64(negativeString));
      }
      catch (OverflowException) {
         Console.WriteLine("{0} is outside the range of the UInt64 type.",
                           Int64.Parse(negativeString.Value, NumberStyles.HexNumber));
      }
   }
}
// The example displays the following output:
//       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
//       -1 is outside the range of the UInt64 type.

let positiveValue = UInt64.MaxValue - 100000uL
let negativeValue = -1L

let mutable positiveString = HexString()
positiveString.Sign <- Math.Sign(decimal positiveValue) |> enum
positiveString.Value <- positiveValue.ToString "X"

let mutable negativeString = HexString()
negativeString.Sign <- sign negativeValue |> enum
negativeString.Value <- negativeValue.ToString "X"

try
    printfn $"0x{positiveString.Value} converts to {Convert.ToUInt64 positiveString}."
with :? OverflowException ->
    printfn $"{Int64.Parse(positiveString.Value, NumberStyles.HexNumber)} is outside the range of the UInt64 type."

try
    printfn $"0x{negativeString.Value} converts to {Convert.ToUInt64 negativeString}."
with :? OverflowException ->
    printfn $"{Int64.Parse(negativeString.Value, NumberStyles.HexNumber)} is outside the range of the UInt64 type."
// The example displays the following output:
//       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
//       -1 is outside the range of the UInt64 type.

Module Example
   Public Sub Main()
      Dim positiveValue As UInt64 = CULng(UInt64.MaxValue - 100000)
      Dim negativeValue As Int64 = -1
      
      
      Dim positiveString As New HexString()
      positiveString.Sign = CType(Math.Sign(positiveValue), SignBit)
      positiveString.Value = positiveValue.ToString("X")
      
      Dim negativeString As New HexString()
      negativeString.Sign = CType(Math.Sign(negativeValue), SignBit)
      negativeString.Value = negativeValue.ToString("X")
      
      Try
         Console.WriteLine("0x{0} converts to {1}.", positiveString.Value, Convert.ToUInt64(positiveString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt64 type.", _
                           Int64.Parse(positiveString.Value, NumberStyles.HexNumber))
      End Try

      Try
         Console.WriteLine("0x{0} converts to {1}.", negativeString.Value, Convert.ToUInt64(negativeString))
      Catch e As OverflowException
         Console.WriteLine("{0} is outside the range of the UInt64 type.", _
                           Int64.Parse(negativeString.Value, NumberStyles.HexNumber))
      End Try   
   End Sub
End Module
' The example dosplays the following output:
'       0xFFFFFFFFFFFE795F converts to 18446744073709451615.
'       -1 is outside the range of the UInt64 type.

備註

傳回值是叫用 IConvertible.ToUInt64 基礎類型 value之方法的結果。

provider 可讓使用者指定有關內容 value的文化特性特定轉換資訊。例如，如果 value 是 String 代表數位的， provider 可能會提供用來表示該數位之表示法的文化特性特定資訊。

基底類型會忽略 provider;不過，如果 value 是實作 IConvertible 介面的使用者定義型別，可以使用參數。

適用於

ToUInt64(Single)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定之單精確度浮點數的值，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(float value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (float value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : single -> uint64

Public Shared Function ToUInt64 (value As Single) As ULong

參數

value: Single

要轉換的單精確度浮點數。

傳回

UInt64

value，四捨五入為最接近的 64 位元不帶正負號整數。如果 value 介於兩個整數正中間時，則傳回偶數；也就是 4.5 會轉換為 4，5.5 會轉換為 6。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零或大於 UInt64.MaxValue。

範例

下列範例會嘗試將值陣列 Single 中的每個元素轉換成不帶正負號的長整數。輸出會顯示在執行轉換之前，小數值會四捨五入。

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

foreach (float value in values)
{
   try {
      result = Convert.ToUInt64(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("{0} is outside the range of the UInt64 type.", value);
   }
}
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt64 type.
//    -1.38E+10 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Single value 0 to the UInt64 value 0.
//    Converted the Single value 9.113E-16 to the UInt64 value 0.
//    Converted the Single value 103.919 to the UInt64 value 104.
//    Converted the Single value 17834.19 to the UInt64 value 17834.
//    3.402823E+38 is outside the range of the UInt64 type.

let numbers = 
    [| Single.MinValue; -1.38e10f; -1023.299f; -12.98f
       0f; 9.113e-16f; 103.919f; 17834.191f; Single.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -3.402823E+38 is outside the range of the UInt64 type.
//    -1.38E+10 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Single value '0' to the UInt64 value 0.
//    Converted the Single value '9.113E-16' to the UInt64 value 0.
//    Converted the Single value '103.919' to the UInt64 value 104.
//    Converted the Single value '17834.19' to the UInt64 value 17834.
//    3.402823E+38 is outside the range of the UInt64 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 ULong
   
   For Each value As Single In values
      Try
         result = Convert.ToUInt64(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 UInt64 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 UInt64 type.
'    The Single value -1.38E+10 is outside the range of the UInt64 type.
'    The Single value -1023.299 is outside the range of the UInt64 type.
'    The Single value -12.98 is outside the range of the UInt64 type.
'    Converted the Single value 0 to the UInt64 value 0.
'    Converted the Single value 9.113E-16 to the UInt64 value 0.
'    Converted the Single value 103.919 to the UInt64 value 104.
'    Converted the Single value 17834.19 to the UInt64 value 17834.
'    The Single value 3.402823E+38 is outside the range of the UInt64 type.

另請參閱

Single
Round

適用於

ToUInt64(String, Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定基底中數字的字串表示，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::String ^ value, int fromBase);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string value, int fromBase);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (string? value, int fromBase);

[<System.CLSCompliant(false)>]
static member ToUInt64 : string * int -> uint64

Public Shared Function ToUInt64 (value As String, fromBase As Integer) As ULong

參數

value: String

字串，包含要轉換的數字。

fromBase: Int32

value 中數字的基底，必須是 2、8、10 或 16。

傳回

UInt64

與 value 中之數字相等的 64 位元不帶正負號的整數；如果 value 為 null，則為 0 (零)。

屬性: CLSCompliantAttribute

例外狀況

ArgumentException

fromBase 不是 2、8、10 或 16。

-或-

代表非基底 10 不帶正負號數字的value，前面會加上負號。

ArgumentOutOfRangeException

value 為 Empty。

FormatException

value 所包含的字元在 fromBase 指定的基底中不是有效數字。如果 value 中的第一個字元無效，例外狀況訊息會指出沒有數字可進行轉換；否則訊息會指出 value 包含無效的尾端字元。

OverflowException

代表非基底 10 不帶正負號數字的value，前面會加上負號。

-或-

value 代表小於 UInt64.MinValue 或大於 UInt64.MaxValue 的數位。

範例

下列範例會嘗試將數值字串陣列中的每個元素解譯為十六進位值，並將其轉換成不帶正負號的長整數。

using System;

public class Example
{
   public static void Main()
   {
      string[] hexStrings = { "8000000000000000", "0FFFFFFFFFFFFFFF",
                              "F000000000000000", "00A3000000000000",
                              "D", "-13", "9AC61", "GAD",
                              "FFFFFFFFFFFFFFFFF" };

      foreach (string hexString in hexStrings)
      {
         Console.Write("{0,-18}  -->  ", hexString);
         try {
            ulong number = Convert.ToUInt64(hexString, 16);
            Console.WriteLine("{0,26:N0}", number);
         }
         catch (FormatException) {
            Console.WriteLine("{0,26}", "Bad Format");
         }
         catch (OverflowException) {
            Console.WriteLine("{0,26}", "Numeric Overflow");
         }
         catch (ArgumentException) {
            Console.WriteLine("{0,26}", "Invalid in Base 16");
         }
      }
   }
}
// The example displays the following output:
//    8000000000000000    -->   9,223,372,036,854,775,808
//    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
//    F000000000000000    -->  17,293,822,569,102,704,640
//    00A3000000000000    -->      45,880,421,203,836,928
//    D                   -->                          13
//    -13                 -->          Invalid in Base 16
//    9AC61               -->                     633,953
//    GAD                 -->                  Bad Format
//    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

open System

let hexStrings =
    [| "8000000000000000"; "0FFFFFFFFFFFFFFF"
       "F000000000000000"; "00A3000000000000"
       "D"; "-13"; "9AC61"; "GAD"
       "FFFFFFFFFFFFFFFFF" |]

for hexString in hexStrings do
    printf $"{hexString,-18}  -->  "
    try
        let number = Convert.ToUInt64(hexString, 16)
        printfn $"{number,26:N0}"
    with
    | :? FormatException ->
        printfn "%26s" "Bad Format"
    | :? OverflowException ->
        printfn "%26s" "Numeric Overflow"
    | :? ArgumentException ->
        printfn "%26s" "Invalid in Base 16"
// The example displays the following output:
//    8000000000000000    -->   9,223,372,036,854,775,808
//    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
//    F000000000000000    -->  17,293,822,569,102,704,640
//    00A3000000000000    -->      45,880,421,203,836,928
//    D                   -->                          13
//    -13                 -->          Invalid in Base 16
//    9AC61               -->                     633,953
//    GAD                 -->                  Bad Format
//    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

Module Example
   Public Sub Main()
      Dim hexStrings() As String = { "8000000000000000", "0FFFFFFFFFFFFFFF", _
                                     "F000000000000000", "00A3000000000000", _
                                     "D", "-13", "9AC61", "GAD", _
                                     "FFFFFFFFFFFFFFFFF" }
      For Each hexString As String In hexStrings
         Console.Write("{0,-18}  -->  ", hexString)
         Try
            Dim number As ULong = Convert.ToUInt64(hexString, 16)
            Console.WriteLine("{0,26:N0}", number)
         Catch e As FormatException
            Console.WriteLine("{0,26}", "Bad Format")
         Catch e As OverflowException
            Console.WriteLine("{0,26}", "Numeric Overflow")
         Catch e As ArgumentException
            Console.WriteLine("{0,26}", "Invalid in Base 16")
         End Try
      Next                                            
   End Sub
End Module
' The example displays the following output:
'    8000000000000000    -->   9,223,372,036,854,775,808
'    0FFFFFFFFFFFFFFF    -->   1,152,921,504,606,846,975
'    F000000000000000    -->  17,293,822,569,102,704,640
'    00A3000000000000    -->      45,880,421,203,836,928
'    D                   -->                          13
'    -13                 -->          Invalid in Base 16
'    9AC61               -->                     633,953
'    GAD                 -->                  Bad Format
'    FFFFFFFFFFFFFFFFF   -->            Numeric Overflow

備註

如果 fromBase 為 16，您可以在參數指定的 value 數位前面加上 “0x” 或 “0X”。

UInt64因為數據類型只支援不帶正負號的值，所以ToUInt64(String, Int32)方法會value假設使用不帶正負號的二進位表示表示法來表示。換句話說，所有 64 位都用來表示數值，而符號位不存在。因此，可以撰寫程式代碼，其中超出數據類型範圍的 UInt64 帶正負號長整數值會轉換成 UInt64 值，而不會擲回例外狀況的方法。下列範例會 MinValue 轉換成其十六進位字串表示，然後呼叫 ToUInt64(String, Int32) 方法。方法不會擲回例外狀況，而是顯示訊息：「0x8000000000000000轉換成9223372036854775808」。

// Create a hexadecimal value out of range of the UInt64 type.
string value = Convert.ToString(Int64.MinValue, 16);
// Convert it back to a number.
try
{
   UInt64 number = Convert.ToUInt64(value, 16);
   Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to an unsigned long integer.",
                     value);
}

// Create a hexadecimal value out of range of the UInt64 type.
let value = Convert.ToString(Int64.MinValue, 16)
// Convert it back to a number.
try
    let number = Convert.ToUInt64(value, 16)
    printfn $"0x{value} converts to {number}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned long integer."

' Create a hexadecimal value out of range of the UInt64 type.
Dim value As String = Convert.ToString(Long.MinValue, 16)
' Convert it back to a number.
Try
   Dim number As UInt64 = Convert.ToUInt64(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 long integer.", _
                     value)
End Try

執行二進位運算或數值轉換時，開發人員一律會負責確認方法或運算元是否使用適當的數值表示法來解譯特定值。下列範例說明一種技術，以確保方法不會不當使用二進位表示法來解譯將十六進位字串 UInt64 轉換成值時使用兩個補碼表示法的值。此範例會判斷值是否代表帶正負號或不帶正負號的整數，同時該值將該值轉換成其字串表示。當範例將值轉換成值 UInt64 時，它會檢查原始值是否為帶正負號的整數。若是如此，且其高序位設定為 (，表示原始值為負數) ，則方法會擲回例外狀況。

// Create a negative hexadecimal value out of range of the UInt64 type.
long sourceNumber = Int64.MinValue;
bool isSigned = Math.Sign((long)sourceNumber.GetType().GetField("MinValue").GetValue(null)) == -1;
string value = Convert.ToString(sourceNumber, 16);
UInt64 targetNumber;
try
{
   targetNumber = Convert.ToUInt64(value, 16);
   if (isSigned && ((targetNumber & 0x8000000000000000) != 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 long integer.",
                     value);
}
// Displays the following to the console:
//    Unable to convert '0x8000000000000000' to an unsigned long integer.

// Create a negative hexadecimal value out of range of the UInt64 type.
let sourceNumber = Int64.MinValue
let isSigned = sign (sourceNumber.GetType().GetField("MinValue").GetValue null :?> int64) = -1
let value = Convert.ToString(sourceNumber, 16)
try
    let targetNumber = Convert.ToUInt64(value, 16)
    if isSigned && targetNumber &&& 0x8000000000000000uL <> 0uL then  
        raise (OverflowException())
    else
        printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
    printfn $"Unable to convert '0x{value}' to an unsigned long integer."
// Displays the following to the console:
//    Unable to convert '0x8000000000000000' to an unsigned long integer.

' Create a negative hexadecimal value out of range of the UInt64 type.
Dim sourceNumber As Long = Long.MinValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As UInt64
Try
   targetNumber = Convert.ToUInt64(value, 16)
   If isSigned And ((targetNumber And &H8000000000000000ul) <> 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 long integer.", _
                     value)
End Try 
' Displays the following to the console:
'    Unable to convert '0x8000' to an unsigned long integer.

適用於

ToUInt64(UInt64)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

傳回指定的 64 位元不帶正負號整數；不會執行實際的轉換。

public:
 static System::UInt64 ToUInt64(System::UInt64 value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (ulong value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : uint64 -> uint64

Public Shared Function ToUInt64 (value As ULong) As ULong

參數

value: UInt64

要傳回之 64 位元不帶正負號的整數。

傳回

UInt64

value 會原封不動地傳回。

屬性: CLSCompliantAttribute

適用於

ToUInt64(SByte)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 8 位元帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。

public:
 static System::UInt64 ToUInt64(System::SByte value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (sbyte value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : sbyte -> uint64

Public Shared Function ToUInt64 (value As SByte) As ULong

參數

value: SByte

要轉換的 8 位元帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零。

範例

下列範例會嘗試將帶正負號位元組陣列中的每個項目轉換成不帶正負號的長整數。

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

foreach (sbyte number in numbers)
{
   try {
      result = Convert.ToUInt64(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 UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The SByte value -128 is outside the range of the UInt64 type.
//    The SByte value -1 is outside the range of the UInt64 type.
//    Converted the SByte value 0 to the UInt64 value 0.
//    Converted the SByte value 10 to the UInt64 value 10.
//    Converted the SByte value 127 to the UInt64 value 127.

let numbers = [| SByte.MinValue; -1y; 0y; 10y; SByte.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -128 is outside the range of the UInt64 type.
//    -1 is outside the range of the UInt64 type.
//    Converted the SByte value '0' to the UInt64 value 0.
//    Converted the SByte value '10' to the UInt64 value 10.
//    Converted the SByte value '127' to the UInt64 value 127.

Dim numbers() As SByte = { SByte.MinValue, -1, 0, 10, SByte.MaxValue }
Dim result As ULong

For Each number As SByte In numbers
   Try
      result = Convert.ToUInt64(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 UInt64 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The SByte value -128 is outside the range of the UInt64 type.
'    The SByte value -1 is outside the range of the UInt64 type.
'    Converted the SByte value 0 to the UInt64 value 0.
'    Converted the SByte value 10 to the UInt64 value 10.
'    Converted the SByte value 127 to the UInt64 value 127.

適用於

ToUInt64(Int16)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 16 位元帶正負號整數的值，轉換為相等的 64 位元不帶正負號整數。

public:
 static System::UInt64 ToUInt64(short value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (short value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int16 -> uint64

Public Shared Function ToUInt64 (value As Short) As ULong

參數

value: Int16

要轉換的 16 位元帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零。

範例

下列範例會嘗試將16位整數陣列中的每個元素轉換成不帶正負號的長整數。

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

foreach (short number in numbers)
{
   try {
      result = Convert.ToUInt64(number);
      Console.WriteLine("Converted the {0} value {1} to a {2} value {3}.",
                           number.GetType().Name, number,
                           result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("{0} is outside the range of the UInt64 type.", number);
   }
}
// The example displays the following output:
//    -32768 is outside the range of the UInt64 type.
//    -1 is outside the range of the UInt64 type.
//    Converted the Int16 value 0 to a UInt64 value 0.
//    Converted the Int16 value 121 to a UInt64 value 121.
//    Converted the Int16 value 340 to a UInt64 value 340.
//    Converted the Int16 value 32767 to a UInt64 value 32767.

let numbers = [| Int16.MinValue; -132s; 0s; 121s; 16103s; Int16.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the UInt64 type.
//    The Int16 value -132 is outside the range of the UInt64 type.
//    Converted the Int16 value '0' to the UInt64 value 0.
//    Converted the Int16 value '121' to the UInt64 value 121.
//    Converted the Int16 value '16103' to the UInt64 value 16103.
//    Converted the Int16 value '32767' to the UInt64 value 32767.

Dim numbers() As Short = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue }
Dim result As ULong

For Each number As Short In numbers
   Try
      result = Convert.ToUInt64(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 UInt64 type.", _
                        number.GetType().Name, number)
   End Try   
Next
' The example displays the following output:
'    The Int16 value -32768 is outside the range of the UInt64 type.
'    The Int16 value -1 is outside the range of the UInt64 type.
'    Converted the Int16 value 0 to the UInt64 value 0.
'    Converted the Int16 value 121 to the UInt64 value 121.
'    Converted the Int16 value 340 to the UInt64 value 340.
'    Converted the Int16 value 32767 to the UInt64 value 32767.

適用於

ToUInt64(Int64)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 64 位元帶正負號的整數值轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(long value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (long value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int64 -> uint64

Public Shared Function ToUInt64 (value As Long) As ULong

參數

value: Int64

要轉換的 64 位元帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零。

範例

下列範例會嘗試將長整數數位中的每個項目轉換成不帶正負號的長整數。

long[] numbers = { Int64.MinValue, -19432, -18, 0, 121, 340, Int64.MaxValue };
ulong result;
foreach (long number in numbers)
{
   try {
      result = Convert.ToUInt64(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 UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
//    The Int64 value -19432 is outside the range of the UInt64 type.
//    The Int64 value -18 is outside the range of the UInt64 type.
//    Converted the Int64 value 0 to the UInt64 value 0.
//    Converted the Int64 value 121 to the UInt64 value 121.
//    Converted the Int64 value 340 to the UInt64 value 340.
//    Converted the Int64 value 9223372036854775807 to a UInt64 value 9223372036854775807.

let numbers = [| Int64.MinValue; -1; 0; 121; 340; Int64.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
//    The Int64 value -1 is outside the range of the UInt64 type.
//    Converted the Int64 value '0' to the UInt64 value 0.
//    Converted the Int64 value '121' to the UInt64 value 121.
//    Converted the Int64 value '340' to the UInt64 value 340.
//    The Int64 value 9223372036854775807 is outside the range of the UInt64 type.

Dim numbers() As Long = { Int64.MinValue, -19432, -18, 0, 121, 340, Int64.MaxValue }
Dim result As ULong

For Each number As Long In numbers
   Try
      result = Convert.ToUInt64(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 UInt64 type.", _
                        number.GetType().Name, number)
   End Try
Next
' The example displays the following output:
'    The Int64 value -9223372036854775808 is outside the range of the UInt64 type.
'    The Int64 value -19432 is outside the range of the UInt64 type.
'    The Int64 value -18 is outside the range of the UInt64 type.
'    Converted the Int64 value 0 to the UInt64 value 0.
'    Converted the Int64 value 121 to the UInt64 value 121.
'    Converted the Int64 value 340 to the UInt64 value 340.
'    Converted the Int64 value 9223372036854775807 to the UInt64 value 9223372036854775807.

適用於

ToUInt64(Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 32 位元帶正負號的整數值轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(int value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (int value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : int -> uint64

Public Shared Function ToUInt64 (value As Integer) As ULong

參數

value: Int32

要轉換的 32 位元帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零。

範例

下列範例會嘗試將整數數位中的每個項目轉換成不帶正負號的長整數。

int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
ulong result;

foreach (int number in numbers)
{
   try {
      result = Convert.ToUInt64(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 UInt64 type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt64 type.
//    The Int32 value -1 is outside the range of the UInt64 type.
//    Converted the Int32 value 0 to the UInt64 value 0.
//    Converted the Int32 value 121 to the UInt64 value 121.
//    Converted the Int32 value 340 to the UInt64 value 340.
//    Converted the Int32 value 2147483647 to the UInt64 value 2147483647.

let numbers = [| Int32.MinValue; -1; 0; 121; 340; Int32.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn "The {number.GetType().Name} value {number} is outside the range of the UInt64 type."
                        
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the UInt64 type.
//    The Int32 value -1 is outside the range of the UInt64 type.
//    Converted the Int32 value '0' to the UInt64 value 0.
//    Converted the Int32 value '121' to the UInt64 value 121.
//    Converted the Int32 value '340' to the UInt64 value 340.
//    The Int32 value 2147483647 is outside the range of the UInt64 type.

Dim numbers() As Integer = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue }
Dim result As ULong

For Each number As Integer In numbers
   Try
      result = Convert.ToUInt64(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 UInt64 type.", _
                        number.GetType().Name, number)
   End Try   
Next
' The example displays the following output:
'    The Int32 value -2147483648 is outside the range of the UInt64 type.
'    The Int32 value -1 is outside the range of the UInt64 type.
'    Converted the Int32 value 0 to the UInt64 value 0.
'    Converted the Int32 value 121 to the UInt64 value 121.
'    Converted the Int32 value 340 to the UInt64 value 340.
'    Converted the Int32 value 2147483647 to the UInt64 value 2147483647.

適用於

ToUInt64(Double)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定之雙精確度浮點數的值，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(double value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (double value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : double -> uint64

Public Shared Function ToUInt64 (value As Double) As ULong

參數

value: Double

要轉換的雙精確度浮點數。

傳回

UInt64

value，四捨五入為最接近的 64 位元不帶正負號整數。如果 value 介於兩個整數正中間時，則傳回偶數；也就是 4.5 會轉換為 4，5.5 會轉換為 6。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零或大於 UInt64.MaxValue。

範例

下列範例會嘗試將值陣列 Double 中的每個項目轉換成不帶正負號的長整數。

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

foreach (double value in values)
{
   try {
      result = Convert.ToUInt64(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("{0} is outside the range of the UInt64 type.", value);
   }
}
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt64 type.
//    -13800000000 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Double value '0' to the UInt64 value 0.
//    Converted the Double value '9.113E-16' to the UInt64 value 0.
//    Converted the Double value '103.919' to the UInt64 value 104.
//    Converted the Double value '17834.191' to the UInt64 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt64 type.

let numbers = 
    [| Double.MinValue; -1.38e10; -1023.299; -12.98
       0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -1.79769313486232E+308 is outside the range of the UInt64 type.
//    -13800000000 is outside the range of the UInt64 type.
//    -1023.299 is outside the range of the UInt64 type.
//    -12.98 is outside the range of the UInt64 type.
//    Converted the Double value '0' to the UInt64 value 0.
//    Converted the Double value '9.113E-16' to the UInt64 value 0.
//    Converted the Double value '103.919' to the UInt64 value 104.
//    Converted the Double value '17834.191' to the UInt64 value 17834.
//    1.79769313486232E+308 is outside the range of the UInt64 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 ULong

For Each value As Double In values
   Try
      result = Convert.ToUInt64(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 UInt64 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 UInt64 type.
'    The Double value -13800000000 is outside the range of the UInt64 type.
'    The Double value -1023.299 is outside the range of the UInt64 type.
'    The Double value -12.98 is outside the range of the UInt64 type.
'    Converted the Double value '0' to the UInt64 value 0.
'    Converted the Double value '9.113E-16' to the UInt64 value 0.
'    Converted the Double value '103.919' to the UInt64 value 104.
'    Converted the Double value '17834.191' to the UInt64 value 17834.
'    The Double value 1.79769313486232E+308 is outside the range of the UInt64 type.

另請參閱

Double
Round

適用於

ToUInt64(Decimal)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定之十進位數字的值，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::Decimal value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (decimal value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : decimal -> uint64

Public Shared Function ToUInt64 (value As Decimal) As ULong

參數

value: Decimal

要轉換的十進位數字。

傳回

UInt64

value，四捨五入為最接近的 64 位元不帶正負號整數。如果 value 介於兩個整數正中間時，則傳回偶數；也就是 4.5 會轉換為 4，5.5 會轉換為 6。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於零或大於 UInt64.MaxValue。

範例

下列範例會嘗試將值陣列 Decimal 中的每個項目轉換成不帶正負號的長整數。

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

foreach (decimal value in values)
{
   try {
      result = Convert.ToUInt64(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("{0} is outside the range of the UInt64 type.",
                        value);
   }
}
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt64 type.
//    -1034.23 is outside the range of the UInt64 type.
//    -12 is outside the range of the UInt64 type.
//    Converted the Decimal value '0' to the UInt64 value 0.
//    Converted the Decimal value '147' to the UInt64 value 147.
//    Converted the Decimal value '199.55' to the UInt64 value 200.
//    Converted the Decimal value '9214.16' to the UInt64 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt64 type.

let numbers = 
    [| Decimal.MinValue; -1034.23m; -12m; 0m; 147m; 9214.16m; Decimal.MaxValue |]

for number in numbers do
    try
        let result = Convert.ToUInt16 number
        printfn $"Converted the {number.GetType().Name} value '{number}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"{number} is outside the range of the UInt64 type."
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt64 type.
//    -1034.23 is outside the range of the UInt64 type.
//    -12 is outside the range of the UInt64 type.
//    Converted the Decimal value '0' to the UInt64 value 0.
//    Converted the Decimal value '147' to the UInt64 value 147.
//    Converted the Decimal value '9214.16' to the UInt64 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt64 type.

Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                            199.55d, 9214.16d, Decimal.MaxValue }
Dim result As ULong

For Each value As Decimal In values
   Try
      result = Convert.ToUInt64(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 UInt64 type.", _
                        value.GetType().Name, value)
   End Try   
Next                                  
' The example displays the following output:
'    The Decimal value -79228162514264337593543950335 is outside the range of the UInt64 type.
'    The Decimal value -1034.23 is outside the range of the UInt64 type.
'    The Decimal value -12 is outside the range of the UInt64 type.
'    Converted the Decimal value '0' to the UInt64 value 0.
'    Converted the Decimal value '147' to the UInt64 value 147.
'    Converted the Decimal value '199.55' to the UInt64 value 200.
'    Converted the Decimal value '9214.16' to the UInt64 value 9214.
'    The Decimal value 79228162514264337593543950335 is outside the range of the UInt64 type.

另請參閱

Round

適用於

ToUInt64(DateTime)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

呼叫這個方法一律會擲回 InvalidCastException。

public:
 static System::UInt64 ToUInt64(DateTime value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (DateTime value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : DateTime -> uint64

Public Shared Function ToUInt64 (value As DateTime) As ULong

參數

value: DateTime

要轉換的日期和時間值。

傳回

UInt64

不支援此轉換。沒有傳回值。

屬性: CLSCompliantAttribute

例外狀況

InvalidCastException

不支援此轉換。

適用於

ToUInt64(Char)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 Unicode 字元值轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(char value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (char value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : char -> uint64

Public Shared Function ToUInt64 (value As Char) As ULong

參數

value: Char

要轉換的 Unicode 字元。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數。

屬性: CLSCompliantAttribute

範例

下列範例會將字元陣列中的每個項目轉換成不帶正負號的長整數。

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

foreach (char ch in chars)
{
   result = Convert.ToUInt64(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 UInt64 value 97.
//    Converted the Char value 'z' to the UInt64 value 122.
//    Converted the Char value '' to the UInt64 value 7.
//    Converted the Char value '?' to the UInt64 value 1023.
//    Converted the Char value '?' to the UInt64 value 32767.
//    Converted the Char value '?' to the UInt64 value 65534.

let chars = 
    [| 'a'; 'z'; '\u0007'; '\u03FF'; '\u7FFF'; '\uFFFE' |]

for ch in chars do
    try
        let result = Convert.ToUInt16 ch
        printfn $"Converted the {ch.GetType().Name} value '{ch}' to the {result.GetType().Name} value {result}."
    with :? OverflowException ->
        printfn $"Unable to convert u+{int ch:X4} to a UInt16."
// The example displays the following output:
//    Converted the Char value 'a' to the UInt64 value 97.
//    Converted the Char value 'z' to the UInt64 value 122.
//    Converted the Char value '' to the UInt64 value 7.
//    Converted the Char value '?' to the UInt64 value 1023.
//    Converted the Char value '?' to the UInt64 value 32767.
//    Converted the Char value '?' to the UInt64 value 65534.

Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(1023), _
                        ChrW(Short.MaxValue), ChrW(&hFFFE) }
Dim result As ULong
                        
For Each ch As Char in chars
   result = Convert.ToUInt64(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 UInt64 value 97.
'    Converted the Char value 'z' to the UInt64 value 122.
'    Converted the Char value '' to the UInt64 value 7.
'    Converted the Char value '?' to the UInt64 value 1023.
'    Converted the Char value '?' to the UInt64 value 32767.
'    Converted the Char value '?' to the UInt64 value 65534.

適用於

ToUInt64(Byte)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 8 位元不帶正負號整數的值，轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::Byte value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (byte value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : byte -> uint64

Public Shared Function ToUInt64 (value As Byte) As ULong

參數

value: Byte

要轉換之 8 位元不帶正負號的整數。

傳回

UInt64

與 value 相等的 64 位元帶正負號的整數。

屬性: CLSCompliantAttribute

範例

下列範例會將位元組陣列中的每個項目轉換成不帶正負號的長整數。

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

foreach (byte byteValue in bytes)
{
   result = Convert.ToUInt64(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 UInt64 value 0.
//    Converted the Byte value 14 to the UInt64 value 14.
//    Converted the Byte value 122 to the UInt64 value 122.
//    Converted the Byte value 255 to the UInt64 value 255.

let bytes = [| Byte.MinValue; 14uy; 122uy; Byte.MaxValue |]

for byteValue in bytes do
    let result = Convert.ToUInt16 byteValue
    printfn $"Converted the {byteValue.GetType().Name} value '{byteValue}' to the {result.GetType().Name} value {result}."
// The example displays the following output:
//       Converted the Byte value '0' to the UInt64 value 0.
//       Converted the Byte value '14' to the UInt64 value 14.
//       Converted the Byte value '122' to the UInt64 value 122.
//       Converted the Byte value '255' to the UInt64 value 255.

Dim bytes() As Byte = { Byte.MinValue, 14, 122, Byte.MaxValue}
Dim result As ULong

For Each byteValue As Byte In bytes
   result = Convert.ToUInt64(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 UInt64 value 0.
'    Converted the Byte value 14 to the UInt64 value 14.
'    Converted the Byte value 122 to the UInt64 value 122.
'    Converted the Byte value 255 to the UInt64 value 255.

適用於

ToUInt64(Boolean)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的布林值轉換為相等的 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(bool value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (bool value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : bool -> uint64

Public Shared Function ToUInt64 (value As Boolean) As ULong

參數

value: Boolean

要轉換的布林值。

傳回

UInt64

如果 value 為 true，則為數字 1，否則為 0。

屬性: CLSCompliantAttribute

範例

下列範例會將布爾 true 值和 false 值轉換成不帶正負號的長整數。

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine("{0} converts to {1}.", falseFlag,
                  Convert.ToUInt64(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
                  Convert.ToUInt64(trueFlag));
// The example displays the following output:
//       False converts to 0.
//       True converts to 1.

let falseFlag = false
let trueFlag = true

printfn $"{falseFlag} converts to {Convert.ToInt32 falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToInt32 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.ToUInt64(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
                  Convert.ToUInt64(trueFlag))
' The example displays the following output:
'       False converts to 0.
'       True converts to 1.

適用於

ToUInt64(Object)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定之物件的值轉換為 64 位元不帶正負號的整數。

public:
 static System::UInt64 ToUInt64(System::Object ^ value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object value);

[System.CLSCompliant(false)]
public static ulong ToUInt64 (object? value);

[<System.CLSCompliant(false)>]
static member ToUInt64 : obj -> uint64

Public Shared Function ToUInt64 (value As Object) As ULong

參數

value: Object

實作 IConvertible 介面的物件，或是 null。

傳回

UInt64

與 value 相等的 64 位元不帶正負號的整數；如果 value 為 null，則為零。

屬性: CLSCompliantAttribute

例外狀況

FormatException

value 的格式不正確。

InvalidCastException

value 未實作 IConvertible 介面。

-或-

不支援轉換。

OverflowException

value 代表小於 UInt64.MinValue 或大於 UInt64.MaxValue 的數位。

範例

下列範例會嘗試將物件陣列中的每個項目轉換成不帶正負號的長整數。

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

foreach (object value in values)
{
   try {
      result = Convert.ToUInt64(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 UInt64 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 UInt64 exists for the {0} value {1}.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value True to the UInt64 value 1.
//    The Int32 value -12 is outside the range of the UInt64 type.
//    Converted the Int32 value 163 to the UInt64 value 163.
//    Converted the Int32 value 935 to the UInt64 value 935.
//    Converted the Char value x to the UInt64 value 120.
//    No conversion to a UInt64 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value 104 to the UInt64 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt64 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 UInt64 value 100.
//    The Double value 1.63E+43 is outside the range of the UInt64 type.

let values: obj[] =
    [| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
       "104"; "103.0"; "-1"; "1.00e2"; "One"; 1.00e2 |]

for value in values do
    try
        let result = Convert.ToUInt16 value
        printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
    with 
    | :? OverflowException ->
        printfn $"The {value.GetType().Name} value {value} is outside the range of the UInt64 type."
    | :? FormatException ->
        printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
    | :? InvalidCastException ->
        printfn $"No conversion to a UInt16 exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
//    Converted the Boolean value 'True' to the UInt64 value 1.
//    The Int32 value -12 is outside the range of the UInt64 type.
//    Converted the Int32 value '163' to the UInt64 value 163.
//    Converted the Int32 value '935' to the UInt64 value 935.
//    Converted the Char value 'x' to the UInt64 value 120.
//    No conversion to a UInt16 exists for the DateTime value 5/12/2009 12:00:00 AM.
//    Converted the String value '104' to the UInt64 value 104.
//    The String value 103.0 is not in a recognizable format.
//    The String value -1 is outside the range of the UInt64 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 UInt64 value 100.

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 ULong

For Each value As Object In values
   Try
      result = Convert.ToUInt64(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 UInt64 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 UInt64 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 UInt64 value 1.
'    The Int32 value -12 is outside the range of the UInt64 type.
'    Converted the Int32 value 163 to the UInt64 value 163.
'    Converted the Int32 value 935 to the UInt64 value 935.
'    Converted the Char value x to the UInt64 value 120.
'    No conversion to a UInt64 exists for the DateTime value 5/12/2009 12:00:00 AM.
'    Converted the String value 104 to the UInt64 value 104.
'    The String value 103.0 is not in a recognizable format.
'    The String value -1 is outside the range of the UInt64 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 UInt64 value 100.
'    The Double value 1.63E+43 is outside the range of the UInt64 type.

備註

傳回值是叫 IConvertible.ToUInt64 用基礎型 value別之方法的結果。

適用於