BigInteger.Explicit 運算子

參考

定義

命名空間:: System.Numerics

組件:: System.Runtime.Numerics.dll

組件:: System.Numerics.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。

定義 BigInteger 物件與另一個類型之間的明確轉換。

多載

Explicit(BigInteger to SByte)	定義從 BigInteger 物件到帶正負號 8 位元值的明確轉換。此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int16。
Explicit(Single to BigInteger)	定義從 Single 值到 BigInteger 值的明確轉換。
Explicit(Complex to BigInteger)	明確地將值轉換成 Complex 大整數。
Explicit(BigInteger to UIntPtr)	明確地將大整數轉換為 UIntPtr 值。
Explicit(BigInteger to UInt64)	定義從 BigInteger 物件到不帶正負號 64 位元整數值的明確轉換。此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Double。
Explicit(BigInteger to UInt32)	定義從 BigInteger 物件到不帶正負號 32 位元整數值的明確轉換。此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int64。
Explicit(BigInteger to UInt16)	定義從 BigInteger 物件到不帶正負號 16 位元整數值的明確轉換。此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int32。
Explicit(BigInteger to UInt128)	明確地將大整數轉換為 UInt128 值。
Explicit(BigInteger to Single)	定義從 BigInteger 物件到單精確度浮點值的明確轉換。
Explicit(BigInteger to IntPtr)	明確地將大整數轉換為 IntPtr 值。
Explicit(BigInteger to Int64)	定義從 BigInteger 物件到 64 位元帶正負號整數值的明確轉換。
Explicit(BigInteger to Int16)	定義從 BigInteger 物件到 16 位元帶正負號整數值的明確轉換。
Explicit(BigInteger to Int128)	明確地將大整數轉換為 Int128 值。
Explicit(BigInteger to Half)	明確地將大整數轉換為 Half 值。
Explicit(BigInteger to Double)	定義從 BigInteger 物件到 Double 值的明確轉換。
Explicit(BigInteger to Decimal)	定義從 BigInteger 物件到 Decimal 值的明確轉換。
Explicit(BigInteger to Char)	明確地將大整數轉換為 Char 值。
Explicit(BigInteger to Byte)	定義從 BigInteger 物件到不帶正負號位元組值的明確轉換。
Explicit(Half to BigInteger)	明確地將值轉換成 Half 大整數。
Explicit(Double to BigInteger)	定義從 Double 值到 BigInteger 值的明確轉換。
Explicit(Decimal to BigInteger)	定義從 Decimal 物件到 BigInteger 值的明確轉換。
Explicit(BigInteger to Int32)	定義從 BigInteger 物件到 32 位元帶正負號整數值的明確轉換。

Explicit(BigInteger to SByte)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

符合 CLS 規範替代方案: System.Int16

定義從 BigInteger 物件到帶正負號 8 位元值的明確轉換。

此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int16。

public:
 static explicit operator System::SByte(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator sbyte (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> sbyte

Public Shared Narrowing Operator CType (value As BigInteger) As SByte

參數

value: BigInteger

要轉換為帶正負號 8 位元值的值。

傳回

SByte

物件，包含 value 參數的值。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於 SByte.MinValue 或大於 SByte.MaxValue。

範例

下列範例說明如何將 BigInteger 轉換成 SByte 值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 SByte 。

// BigInteger to SByte conversion.
BigInteger goodSByte = BigInteger.MinusOne;
BigInteger badSByte = -130;

sbyte sByteFromBigInteger;

// Successful conversion using cast operator.
sByteFromBigInteger = (sbyte) goodSByte;
Console.WriteLine(sByteFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   sByteFromBigInteger = (sbyte) badSByte;
   Console.WriteLine(sByteFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badSByte, e.Message);
}
Console.WriteLine();

// BigInteger to SByte conversion.
let goodSByte = BigInteger.MinusOne
let badSByte = bigint -130

// Successful conversion using cast operator.
let sByteFromBigInteger = sbyte goodSByte
printfn $"{sByteFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let sByteFromBigInteger = sbyte badSByte
    printfn $"{sByteFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badSByte}:\n   {e.Message}"

' BigInteger to SByte conversion.
Dim goodSByte As BigInteger = BigInteger.MinusOne
Dim badSByte As BigInteger = -130

Dim sByteFromBigInteger As SByte

' Convert using CType function.
sByteFromBigInteger = CType(goodSByte, SByte)
Console.WriteLine(sByteFromBigInteger)
' Convert using CSByte function.
sByteFromBigInteger = CSByte(goodSByte)
Console.WriteLine(sByteFromBigInteger)

' Handle conversion that should result in overflow.
Try
   sByteFromBigInteger = CType(badSByte, SByte)
   Console.WriteLine(sByteFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badSByte, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可從中轉換物件或從中 BigInteger 轉換的型別。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在 C#) 中的轉換運算子 (，或是使用 Visual Basic) 等 CType 或 CSByte 轉換函式 (時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 SByte ，則它可以在執行時間擲回 OverflowException 。如果轉換成功，則結果 SByte 值不會遺失有效位數。

適用於

Explicit(Single to BigInteger)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 Single 值到 BigInteger 值的明確轉換。

public:
 static explicit operator System::Numerics::BigInteger(float value);

public static explicit operator System.Numerics.BigInteger (float value);

static member op_Explicit : single -> System.Numerics.BigInteger

Public Shared Narrowing Operator CType (value As Single) As BigInteger

參數

value: Single

要轉換為 BigInteger 的值。

傳回

BigInteger

物件，包含 value 參數的值。

例外狀況

OverflowException

value 為 NaN、PositiveInfinity 或 NegativeInfinity。

範例

下列範例會將值陣列 Single 中的個別專案轉換成 BigInteger 物件，然後顯示每個轉換的結果。請注意，轉換期間會截斷值的任何小數部分 Single 。

float[] singles = { Single.MinValue, -1.430955172e03f, 2.410970032e05f,
                    Single.MaxValue, Single.PositiveInfinity,
                     Single.NegativeInfinity, Single.NaN };
BigInteger number;

Console.WriteLine("{0,37} {1,37}\n", "Single", "BigInteger");

foreach (float value in singles)
{
   try {
      number = (BigInteger) value;
      Console.WriteLine("{0,37} {1,37}", value, number);
   }
   catch (OverflowException) {
      Console.WriteLine("{0,37} {1,37}", value, "OverflowException");
   }
}
// The example displays the following output:
//           Single                            BigInteger
//
//    -3.402823E+38   -3.4028234663852885981170418348E+38
//        -1430.955                                 -1430
//           241097                                241097
//     3.402823E+38    3.4028234663852885981170418348E+38
//         Infinity                     OverflowException
//        -Infinity                     OverflowException
//              NaN                     OverflowException

let singles =
    [| Single.MinValue
       -1.430955172e03f
       2.410970032e05f
       Single.MaxValue
       Single.PositiveInfinity
       Single.NegativeInfinity
       Single.NaN |]

printfn "%37s %37s\n" "Single" "BigInteger"

for value in singles do
    try
        let number = BigInteger(value)
        printfn "%37O %37O" value number
    with :? OverflowException ->
        printfn "%37O %37s" value "OverflowException"
// The example displays the following output:
//           Single                            BigInteger
//
//    -3.402823E+38   -3.4028234663852885981170418348E+38
//        -1430.955                                 -1430
//           241097                                241097
//     3.402823E+38    3.4028234663852885981170418348E+38
//         Infinity                     OverflowException
//        -Infinity                     OverflowException
//              NaN                     OverflowException

Dim singles() As Single = { Single.MinValue, -1.430955172e03, 2.410970032e05, 
                            Single.MaxValue, Single.PositiveInfinity, 
                            Single.NegativeInfinity, Single.NaN }
Dim number As BigInteger

Console.WriteLine("{0,37} {1,37}", "Single", "BigInteger")
Console.WriteLine()
For Each value As Single In singles
   Try
      number = CType(value, BigInteger)
      Console.WriteLine("{0,37} {1,37}", value, number)
   Catch e As OverflowException
      Console.WriteLine("{0,37} {1,37}", value, "OverflowException")
   End Try
Next     
' The example displays the following output:
'           Single                            BigInteger
' 
'    -3.402823E+38   -3.4028234663852885981170418348E+38
'        -1430.955                                 -1430
'           241097                                241097
'     3.402823E+38    3.4028234663852885981170418348E+38
'         Infinity                     OverflowException
'        -Infinity                     OverflowException
'              NaN                     OverflowException

備註

在轉換之前，會截斷參數的任何小數部分 value 。

方法的多 Explicit(Decimal to BigInteger) 載會定義可從中轉換物件或從中 BigInteger 轉換的型別。由於從 Single 轉換成 BigInteger 的牽涉到截斷任何小數部分 value ，因此語言編譯器不會自動執行此轉換。相反地，只有在 C#) 中的轉換運算子 (，或使用 Visual Basic) 之類的 CType 轉換函式 (時，才會執行轉換。否則，它們會顯示編譯器錯誤。

對於不支援自訂運算子的語言，替代方法是 BigInteger.BigInteger(Single) 。

適用於

Explicit(Complex to BigInteger)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確地將值轉換成 Complex 大整數。

public:
 static explicit operator System::Numerics::BigInteger(System::Numerics::Complex value);

public static explicit operator System.Numerics.BigInteger (System.Numerics.Complex value);

static member op_Explicit : System.Numerics.Complex -> System.Numerics.BigInteger

Public Shared Narrowing Operator CType (value As Complex) As BigInteger

參數

value: Complex

要進行轉換的值。

傳回

BigInteger

value 轉換成大整數。

適用於

Explicit(BigInteger to UIntPtr)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

明確將大整數轉換成 UIntPtr 值。

public:
 static explicit operator UIntPtr(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator UIntPtr (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> unativeint

Public Shared Narrowing Operator CType (value As BigInteger) As UIntPtr

參數

value: BigInteger

要進行轉換的值。

傳回

UIntPtr

unativeint

value 轉換成 UIntPtr 值。

屬性: CLSCompliantAttribute

適用於

Explicit(BigInteger to UInt64)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

符合 CLS 規範替代方案: System.Double

定義從 BigInteger 物件到不帶正負號 64 位元整數值的明確轉換。

此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Double。

public:
 static explicit operator System::UInt64(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator ulong (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> uint64

Public Shared Narrowing Operator CType (value As BigInteger) As ULong

參數

value: BigInteger

要轉換為不帶正負號 64 位元整數的值。

傳回

UInt64

物件，包含 value 參數的值。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於 UInt64.MinValue 或大於 UInt64.MaxValue。

範例

下列範例說明如何將 BigInteger UInt64 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 UInt64 。

// BigInteger to UInt64 conversion.
BigInteger goodULong = 2000000000;
BigInteger badULong = BigInteger.Pow(goodULong, 3);

ulong uLongFromBigInteger;

// Successful conversion using cast operator.
uLongFromBigInteger = (ulong) goodULong;
Console.WriteLine(uLongFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   uLongFromBigInteger = (ulong) badULong;
   Console.WriteLine(uLongFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badULong, e.Message);
}
Console.WriteLine();

// BigInteger to UInt64 conversion.
let goodULong = bigint 2000000000
let badULong = BigInteger.Pow(goodULong, 3)

// Successful conversion using cast operator.
let uLongFromBigInteger = uint64 goodULong
printfn $"{uLongFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let uLongFromBigInteger = uint64 badULong
    printfn $"{uLongFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badULong}:\n   {e.Message}"

' BigInteger to UInt64 conversion.
Dim goodULong As BigInteger = 2000000000
Dim badULong As BigInteger = BigInteger.Pow(goodULong, 3)

Dim uLongFromBigInteger As ULong

' Convert using CType function.
uLongFromBigInteger = CType(goodULong, ULong)
Console.WriteLine(uLongFromBigInteger)
' Convert using CULng function.
uLongFromBigInteger = CULng(goodULong)
Console.WriteLine(uLongFromBigInteger)

' Handle conversion that should result in overflow.
Try
   uLongFromBigInteger = CType(badULong, ULong)
   Console.WriteLine(uLongFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badULong, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCULng 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 UInt64 ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 UInt64 值中不會遺失精確度。

適用於

Explicit(BigInteger to UInt32)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

符合 CLS 規範替代方案: System.Int64

定義從 BigInteger 物件到不帶正負號 32 位元整數值的明確轉換。

此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int64。

public:
 static explicit operator System::UInt32(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator uint (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> uint32

Public Shared Narrowing Operator CType (value As BigInteger) As UInteger

參數

value: BigInteger

要轉換為不帶正負號 32 位元整數的值。

傳回

UInt32

物件，包含 value 參數的值。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於 UInt32.MinValue 或大於 UInt32.MaxValue。

範例

下列範例說明如何將 BigInteger UInt32 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 UInt32 。

// BigInteger to UInt32 conversion.
BigInteger goodUInteger = 200000;
BigInteger badUInteger = 65000000000;

uint uIntegerFromBigInteger;

// Successful conversion using cast operator.
uIntegerFromBigInteger = (uint) goodInteger;
Console.WriteLine(uIntegerFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   uIntegerFromBigInteger = (uint) badUInteger;
   Console.WriteLine(uIntegerFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badUInteger, e.Message);
}
Console.WriteLine();

// BigInteger to UInt32 conversion.
let goodUInteger = bigint 200000
let badUInteger = bigint 65000000000L

// Successful conversion using cast operator.
let uIntegerFromBigInteger = uint goodInteger
printfn $"{uIntegerFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let uIntegerFromBigInteger = uint badUInteger
    printfn $"{uIntegerFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badUInteger}:\n   {e.Message}"

' BigInteger to UInt32 conversion.
Dim goodUInteger As BigInteger = 200000
Dim badUInteger As BigInteger = 65000000000

Dim uIntegerFromBigInteger As UInteger

' Convert using CType function.
uIntegerFromBigInteger = CType(goodInteger, UInteger)
Console.WriteLine(uIntegerFromBigInteger)
' Convert using CUInt function.
uIntegerFromBigInteger = CUInt(goodInteger)
Console.WriteLine(uIntegerFromBigInteger)

' Handle conversion that should result in overflow.
Try
   uIntegerFromBigInteger = CType(badUInteger, UInteger)
   Console.WriteLine(uIntegerFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badUInteger, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCUInt 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 UInt32 ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 UInt32 值中不會遺失精確度。

適用於

Explicit(BigInteger to UInt16)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

符合 CLS 規範替代方案: System.Int32

定義從 BigInteger 物件到不帶正負號 16 位元整數值的明確轉換。

此應用程式開發介面不符合 CLS 標準。符合規範的替代項目為 Int32。

public:
 static explicit operator System::UInt16(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator ushort (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> uint16

Public Shared Narrowing Operator CType (value As BigInteger) As UShort

參數

value: BigInteger

要轉換為不帶正負號 16 位元整數的值。

傳回

UInt16

物件，包含 value 參數的值。

屬性: CLSCompliantAttribute

例外狀況

OverflowException

value 小於 UInt16.MinValue 或大於 UInt16.MaxValue。

範例

下列範例說明如何將 BigInteger UInt16 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 UInt16 。

// BigInteger to UInt16 conversion.
BigInteger goodUShort = 20000;
BigInteger badUShort = 66000;

ushort uShortFromBigInteger;

// Successful conversion using cast operator.
uShortFromBigInteger = (ushort) goodUShort;
Console.WriteLine(uShortFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   uShortFromBigInteger = (ushort) badUShort;
   Console.WriteLine(uShortFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badUShort, e.Message);
}
Console.WriteLine();

// BigInteger to UInt16 conversion.
let goodUShort = bigint 20000
let badUShort = bigint 66000

// Successful conversion using cast operator.
let uShortFromBigInteger = uint16 goodUShort
printfn $"{uShortFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let uShortFromBigInteger = uint16 badUShort
    printfn $"{uShortFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badSByte}:\n   {e.Message}"

' BigInteger to UInt16 conversion.
Dim goodUShort As BigInteger = 20000
Dim badUShort As BigInteger = 66000

Dim uShortFromBigInteger As UShort

' Convert using CType function.
uShortFromBigInteger = CType(goodUShort, UShort)
Console.WriteLine(uShortFromBigInteger)
' Convert using CUShort function.
uShortFromBigInteger = CUShort(goodUShort)
Console.WriteLine(uShortFromBigInteger)

' Handle conversion that should result in overflow.
Try
   uShortFromBigInteger = CType(badUShort, UShort)
   Console.WriteLine(uShortFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badUShort, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCUShort 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 UInt16 ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 UInt16 值中不會遺失精確度。

適用於

Explicit(BigInteger to UInt128)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

重要

此 API 不符合 CLS 規範。

明確將大整數轉換成 UInt128 值。

public:
 static explicit operator UInt128(System::Numerics::BigInteger value);

[System.CLSCompliant(false)]
public static explicit operator UInt128 (System.Numerics.BigInteger value);

[<System.CLSCompliant(false)>]
static member op_Explicit : System.Numerics.BigInteger -> UInt128

Public Shared Narrowing Operator CType (value As BigInteger) As UInt128

參數

value: BigInteger

要進行轉換的值。

傳回

UInt128

value 轉換為 UInt128 值。

屬性: CLSCompliantAttribute

適用於

Explicit(BigInteger to Single)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到單精確度浮點值的明確轉換。

public:
 static explicit operator float(System::Numerics::BigInteger value);

public static explicit operator float (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> single

Public Shared Narrowing Operator CType (value As BigInteger) As Single

參數

value: BigInteger

要轉換為單精確度浮點值的值。

傳回

Single

物件，包含 value 參數的最接近的可能表示。

範例

下列範例說明如何將 BigInteger Single 轉換成值。

// BigInteger to Single conversion.
BigInteger goodSingle = (BigInteger) 102.43e22F;
BigInteger badSingle = (BigInteger) float.MaxValue;
badSingle = badSingle * 2;

float singleFromBigInteger;

// Successful conversion using cast operator.
singleFromBigInteger = (float) goodSingle;
Console.WriteLine(singleFromBigInteger);

// Convert an out-of-bounds BigInteger value to a Single.
singleFromBigInteger = (float) badSingle;
Console.WriteLine(singleFromBigInteger);

// BigInteger to Single conversion.
let goodSingle = bigint 102.43e22F
let badSingle = bigint Single.MaxValue * bigint 2

// Successful conversion using cast operator.
let singleFromBigInteger = float32 goodSingle
printfn $"{singleFromBigInteger}"

// Convert an out-of-bounds BigInteger value to a Single.
let singleFromBigInteger = float32 badSingle
printfn $"{singleFromBigInteger}"

' BigInteger to Single conversion.
Dim goodSingle As BigInteger = 102.43e22
Dim badSingle As BigInteger = CType(Single.MaxValue, BigInteger)  
badSingle = badSingle * 2

Dim singleFromBigInteger As Single

' Convert using CType function.
singleFromBigInteger = CType(goodSingle, Single)
Console.WriteLine(singleFromBigInteger)
' Convert using CSng function.
singleFromBigInteger = CSng(goodSingle)
Console.WriteLine(singleFromBigInteger)

' Convert an out-of-bounds BigInteger value to a Single.
singleFromBigInteger = CType(badSingle, Single)
Console.WriteLine(singleFromBigInteger)

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失或精確度遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCSng 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

BigInteger因為值可以超出資料類型的範圍 Single ，所以此作業是縮小轉換。如果轉換失敗，則不會擲回 OverflowException 。相反地，如果 BigInteger 值小於 Single.MinValue ，則產生的 Single 值為 Single.NegativeInfinity 。 BigInteger如果值大於 Single.MaxValue ，則產生的 Single 值為 Single.PositiveInfinity 。

轉換成 BigInteger Single 的可能牽涉到精確度遺失。在某些情況下，遺失精確度可能會導致轉換或轉換作業成功，即使 BigInteger 該值超出資料類型的範圍 Single 也一樣。下列範例提供說明。它會將的 Single 最大值指派給兩 BigInteger 個變數、將一個變數遞增 9.999e291，並測試兩個 BigInteger 變數是否相等。如預期般，對方法的 BigInteger.Equals(BigInteger) 呼叫會顯示它們不相等。不過，較大的值轉換 BigInteger 回 Single 成功，但 BigInteger 值現在超過 Single.MaxValue 。

// Increase a BigInteger so it exceeds Single.MaxValue.
BigInteger number1 = (BigInteger) Single.MaxValue;
BigInteger number2 = number1;
number2 = number2 + (BigInteger) 9.999e30;
// Compare the BigInteger values for equality.
Console.WriteLine("BigIntegers equal: {0}", number2.Equals(number1));

// Convert the BigInteger to a Single.
float sng = (float) number2;

// Display the two values.
Console.WriteLine("BigInteger: {0}", number2);
Console.WriteLine("Single:     {0}", sng);
// The example displays the following output:
//       BigIntegers equal: False
//       BigInteger: 3.4028235663752885981170396038E+38
//       Single:     3.402823E+38

// Increase a BigInteger so it exceeds Single.MaxValue.
let number1 = bigint Single.MaxValue

let number2 = number1 + bigint 9.999e30
// Compare the BigInteger values for equality.
printfn $"BigIntegers equal: {number2.Equals number1}"

// Convert the BigInteger to a Single.
let sng = float32 number2

// Display the two values.
printfn $"BigInteger: {number2}"
printfn $"Single:     {sng}"
// The example displays the following output:
//       BigIntegers equal: False
//       BigInteger: 3.4028235663752885981170396038E+38
//       Single:     3.402823E+38

' Increase a BigInteger so it exceeds Single.MaxValue.
Dim number1 As BigInteger = CType(Single.MaxValue, BigInteger)
Dim number2 As BigInteger = number1
number2 = number2 + 9.999e30
' Compare the BigInteger values for equality.
Console.WriteLine("BigIntegers equal: {0}", number2.Equals(number1))

' Convert the BigInteger to a Single.
Dim sng As Single = CType(number2, Single)

' Display the two values.
Console.WriteLine("BigInteger: {0}", number2)
Console.WriteLine("Single:     {0}", sng)      
' The example displays the following output:
'       BigIntegers equal: False
'       BigInteger: 3.4028235663752885981170396038E+38
'       Single:     3.402823E+38

適用於

Explicit(BigInteger to IntPtr)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確將大整數轉換成 IntPtr 值。

public:
 static explicit operator IntPtr(System::Numerics::BigInteger value);

public static explicit operator IntPtr (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> nativeint

Public Shared Narrowing Operator CType (value As BigInteger) As IntPtr

參數

value: BigInteger

要進行轉換的值。

傳回

IntPtr

nativeint

value 轉換為 IntPtr 值。

適用於

Explicit(BigInteger to Int64)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到 64 位元帶正負號整數值的明確轉換。

public:
 static explicit operator long(System::Numerics::BigInteger value);

public static explicit operator long (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> int64

Public Shared Narrowing Operator CType (value As BigInteger) As Long

參數

value: BigInteger

要轉換為 64 位元帶正負號整數的值。

傳回

Int64

物件，包含 value 參數的值。

例外狀況

OverflowException

value 小於 Int64.MinValue 或大於 Int64.MaxValue。

範例

下列範例說明如何將 BigInteger Int64 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 Int64 。

// BigInteger to Int64 conversion.
BigInteger goodLong = 2000000000;
BigInteger badLong = BigInteger.Pow(goodLong, 3);

long longFromBigInteger;

// Successful conversion using cast operator.
longFromBigInteger = (long) goodLong;
Console.WriteLine(longFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   longFromBigInteger = (long) badLong;
   Console.WriteLine(longFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badLong, e.Message);
}
Console.WriteLine();

// BigInteger to Int64 conversion.
let goodLong = 2000000000
let badLong = BigInteger.Pow(goodLong, 3)

// Successful conversion using cast operator.
let longFromBigInteger = int64 goodLong
printfn $"{longFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let longFromBigInteger = int64 badLong
    printfn $"{longFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badLong}:\n   {e.Message}"

' BigInteger to Int64 conversion.
Dim goodLong As BigInteger = 2000000000
Dim badLong As BigInteger = BigInteger.Pow(goodLong, 3)

Dim longFromBigInteger As Long

' Convert using CType function.
longFromBigInteger = CType(goodLong, Long)
Console.WriteLine(longFromBigInteger)
' Convert using CLng function.
longFromBigInteger = CLng(goodLong)
Console.WriteLine(longFromBigInteger)

' Handle conversion that should result in overflow.
Try
   longFromBigInteger = CType(badLong, Long)
   Console.WriteLine(longFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badLong, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCLng 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 Int64 ，它可以在執行時間擲 OverflowException 回。

適用於

Explicit(BigInteger to Int16)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到 16 位元帶正負號整數值的明確轉換。

public:
 static explicit operator short(System::Numerics::BigInteger value);

public static explicit operator short (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> int16

Public Shared Narrowing Operator CType (value As BigInteger) As Short

參數

value: BigInteger

要轉換為 16 位元帶正負號整數的值。

傳回

Int16

物件，包含 value 參數的值。

例外狀況

OverflowException

value 小於 Int16.MinValue 或大於 Int16.MaxValue。

範例

下列範例說明如何將 BigInteger Int16 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 Int16 。

// BigInteger to Int16 conversion.
BigInteger goodShort = 20000;
BigInteger badShort = 33000;

short shortFromBigInteger;

// Successful conversion using cast operator.
shortFromBigInteger = (short) goodShort;
Console.WriteLine(shortFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   shortFromBigInteger = (short) badShort;
   Console.WriteLine(shortFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badShort, e.Message);
}
Console.WriteLine();

// BigInteger to Int16 conversion.
let goodShort = bigint 20000
let badShort = bigint 33000

// Successful conversion using cast operator.
let shortFromBigInteger = int16 goodShort
printfn $"{shortFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let shortFromBigInteger = int16 badShort
    printfn $"{shortFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badShort}:\n   {e.Message}"

' BigInteger to Int16 conversion.
Dim goodShort As BigInteger = 20000
Dim badShort As BigInteger = 33000

Dim shortFromBigInteger As Short

' Convert using CType function.
shortFromBigInteger = CType(goodShort, Short)
Console.WriteLine(shortFromBigInteger)
' Convert using CShort function.
shortFromBigInteger = CShort(goodShort)
Console.WriteLine(shortFromBigInteger)

' Handle conversion that should result in overflow.
Try
   shortFromBigInteger = CType(badShort, Short)
   Console.WriteLine(shortFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badShort, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCShort 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 Int16 ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 Int16 值中不會遺失精確度。

適用於

Explicit(BigInteger to Int128)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確將大整數轉換成 Int128 值。

public:
 static explicit operator Int128(System::Numerics::BigInteger value);

public static explicit operator Int128 (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> Int128

Public Shared Narrowing Operator CType (value As BigInteger) As Int128

參數

value: BigInteger

要進行轉換的值。

傳回

Int128

value 轉換為 Int128 值。

適用於

Explicit(BigInteger to Half)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確將大整數轉換成 Half 值。

public:
 static explicit operator Half(System::Numerics::BigInteger value);

public static explicit operator Half (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> Half

Public Shared Narrowing Operator CType (value As BigInteger) As Half

參數

value: BigInteger

要進行轉換的值。

傳回

Half

value 轉換為 Half 值。

適用於

Explicit(BigInteger to Double)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到 Double 值的明確轉換。

public:
 static explicit operator double(System::Numerics::BigInteger value);

public static explicit operator double (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> double

Public Shared Narrowing Operator CType (value As BigInteger) As Double

參數

value: BigInteger

要轉換為 Double 的值。

傳回

Double

物件，包含 value 參數的值。

範例

下列範例說明如何將 BigInteger Double 轉換成值。

// BigInteger to Double conversion.
BigInteger goodDouble = (BigInteger) 102.43e22;
BigInteger badDouble = (BigInteger) Double.MaxValue;
badDouble = badDouble * 2;

double doubleFromBigInteger;

// successful conversion using cast operator.
doubleFromBigInteger = (double) goodDouble;
Console.WriteLine(doubleFromBigInteger);

// Convert an out-of-bounds BigInteger value to a Double.
doubleFromBigInteger = (double) badDouble;
Console.WriteLine(doubleFromBigInteger);

// BigInteger to Double conversion.
let goodDouble = bigint 102.43e22
let badDouble = bigint Double.MaxValue * bigint 2

// successful conversion using cast operator.
let doubleFromBigInteger = double goodDouble
printfn $"{doubleFromBigInteger}"

// Convert an out-of-bounds BigInteger value to a Double.
let doubleFromBigInteger = double badDouble
printfn $"{doubleFromBigInteger}"

' BigInteger to Double conversion.
Dim goodDouble As BigInteger = 102.43e22
Dim badDouble As BigInteger = CType(Double.MaxValue, BigInteger)  
badDouble = badDouble * 2

Dim doubleFromBigInteger As Double

' Convert using CType function.
doubleFromBigInteger = CType(goodDouble, Double)
Console.WriteLine(doubleFromBigInteger)
' Convert using CDbl function.
doubleFromBigInteger = CDbl(goodDouble)
Console.WriteLine(doubleFromBigInteger)

' Convert an out-of-bounds BigInteger value to a Double.
doubleFromBigInteger = CType(badDouble, Double)
Console.WriteLine(doubleFromBigInteger)

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCDbl 或 Visual Basic) 時，才會執行轉換。

BigInteger因為值可以超出資料類型的範圍 Double ，所以此作業是縮小轉換。如果轉換失敗，則不會擲回 OverflowException 。相反地，如果 BigInteger 值小於 Double.MinValue ，則產生的 Double 值為 Double.NegativeInfinity 。 BigInteger如果值大於 Double.MaxValue ，則產生的 Double 值為 Double.PositiveInfinity 。

轉換成 BigInteger Double 的可能牽涉到精確度遺失。在某些情況下，遺失精確度可能會導致轉換或轉換作業成功，即使 BigInteger 該值超出資料類型的範圍 Double 也一樣。下列範例提供說明。它會將的 Double 最大值指派給兩 BigInteger 個變數、將一個變數遞增 9.999e291，並測試兩個 BigInteger 變數是否相等。如預期般，對方法的 BigInteger.Equals(BigInteger) 呼叫會顯示它們不相等。不過，較大的值轉換 BigInteger 回 Double 成功，但 BigInteger 值現在超過 Double.MaxValue 。

// Increase a BigInteger so it exceeds Double.MaxValue.
BigInteger number1 = (BigInteger) Double.MaxValue;
BigInteger number2 = number1;
number2 = number2 + (BigInteger) 9.999e291;
// Compare the BigInteger values for equality.
Console.WriteLine("BigIntegers equal: {0}", number2.Equals(number1));

// Convert the BigInteger to a Double.
double dbl = (double) number2;

// Display the two values.
Console.WriteLine("BigInteger: {0}", number2);
Console.WriteLine("Double:     {0}", dbl);
// The example displays the following output:
//       BigIntegers equal: False
//       BigInteger: 1.7976931348623158081352742373E+308
//       Double:     1.79769313486232E+308

// Increase a BigInteger so it exceeds Double.MaxValue.
let number1 = bigint Double.MaxValue
let number2 = number1 + bigint 9.999e291
// Compare the BigInteger values for equality.
printfn $"BigIntegers equal: {number2.Equals number1}"

// Convert the BigInteger to a Double.
let dbl = float number2

// Display the two values.
printfn $"BigInteger: {number2}"
printfn $"Double:     {dbl}"
// The example displays the following output:
//       BigIntegers equal: False
//       BigInteger: 1.7976931348623158081352742373E+308
//       Double:     1.79769313486232E+308

' Increase a BigInteger so it exceeds Double.MaxValue.
Dim number1 As BigInteger = CType(Double.MaxValue, BigInteger)
Dim number2 As BigInteger = number1
number2 = number2 + 9.999e291
' Compare the BigInteger values for equality.
Console.WriteLine("BigIntegers equal: {0}", number2.Equals(number1))

' Convert the BigInteger to a Double.
Dim dbl As Double = CType(number2, Double)

' Display the two values.
Console.WriteLine("BigInteger: {0}", number2)
Console.WriteLine("Double:     {0}", dbl)      
' The example displays the following output:
'       BigIntegers equal: False
'       BigInteger: 1.7976931348623158081352742373E+308
'       Double:     1.79769313486232E+308

適用於

Explicit(BigInteger to Decimal)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到 Decimal 值的明確轉換。

public:
 static explicit operator System::Decimal(System::Numerics::BigInteger value);

public static explicit operator decimal (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> decimal

Public Shared Narrowing Operator CType (value As BigInteger) As Decimal

參數

value: BigInteger

要轉換為 Decimal 的值。

傳回

Decimal

物件，包含 value 參數的值。

例外狀況

OverflowException

value 小於 Decimal.MinValue 或大於 Decimal.MaxValue。

範例

下列範例說明如何將 BigInteger Decimal 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 Decimal 。

// BigInteger to Decimal conversion.
BigInteger goodDecimal = 761652543;
BigInteger badDecimal = (BigInteger) Decimal.MaxValue;
badDecimal += BigInteger.One;

Decimal decimalFromBigInteger;

// Successful conversion using cast operator.
decimalFromBigInteger = (decimal) goodDecimal;
Console.WriteLine(decimalFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   decimalFromBigInteger = (decimal) badDecimal;
   Console.WriteLine(decimalFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badDecimal, e.Message);
}
Console.WriteLine();

// BigInteger to Decimal conversion.
let goodDecimal = 761652543
let badDecimal = bigint Decimal.MaxValue + BigInteger.One

// Successful conversion using cast operator.
let decimalFromBigInteger = decimal goodDecimal
printfn $"{decimalFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let decimalFromBigInteger = decimal badDecimal
    printfn $"{decimalFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badDecimal}:\n   {e.Message}"

' BigInteger to Decimal conversion.
Dim goodDecimal As BigInteger = 761652543
Dim badDecimal As BigInteger = CType(Decimal.MaxValue, BigInteger) 
badDecimal += BigInteger.One

Dim decimalFromBigInteger As Decimal

' Convert using CType function.
decimalFromBigInteger = CType(goodDecimal, Decimal)
Console.WriteLine(decimalFromBigInteger)
' Convert using CDec function.
decimalFromBigInteger = CDec(goodDecimal)
Console.WriteLine(decimalFromBigInteger)

' Handle conversion that should result in overflow.
Try
   decimalFromBigInteger = CType(badDecimal, Decimal)
   Console.WriteLine(decimalFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badDecimal, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCDec 或 Visual Basic) 時，才會執行轉換。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 Decimal ，它可以在執行時間擲 OverflowException 回。

適用於

Explicit(BigInteger to Char)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確將大整數轉換成 Char 值。

public:
 static explicit operator char(System::Numerics::BigInteger value);

public static explicit operator char (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> char

Public Shared Narrowing Operator CType (value As BigInteger) As Char

參數

value: BigInteger

要進行轉換的值。

傳回

Char

value 轉換為 Char 值。

適用於

Explicit(BigInteger to Byte)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到不帶正負號位元組值的明確轉換。

public:
 static explicit operator System::Byte(System::Numerics::BigInteger value);

public static explicit operator byte (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> byte

Public Shared Narrowing Operator CType (value As BigInteger) As Byte

參數

value: BigInteger

要轉換為 Byte 的值。

傳回

Byte

物件，包含 value 參數的值。

例外狀況

OverflowException

value 小於 Byte.MinValue 或大於 Byte.MaxValue。

範例

下列範例說明如何將 BigInteger Byte 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 Byte 。

// BigInteger to Byte conversion.
BigInteger goodByte = BigInteger.One;
BigInteger badByte = 256;

byte byteFromBigInteger;

// Successful conversion using cast operator.
byteFromBigInteger = (byte) goodByte;
Console.WriteLine(byteFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   byteFromBigInteger = (byte) badByte;
   Console.WriteLine(byteFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badByte, e.Message);
}
Console.WriteLine();

// BigInteger to Byte conversion.
let goodByte = BigInteger.One
let badByte = bigint 256

// Successful conversion using cast operator.
let byteFromBigInteger = byte goodByte
printfn $"{byteFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let byteFromBigInteger = byte badByte
    printfn $"{byteFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badByte}:\n   {e.Message}"

' BigInteger to Byte conversion.
Dim goodByte As BigInteger = BigInteger.One
Dim badByte As BigInteger = 256

Dim byteFromBigInteger As Byte   

' Convert using CType function.
byteFromBigInteger = CType(goodByte, Byte)
Console.WriteLine(byteFromBigInteger)
' Convert using CByte function.
byteFromBigInteger = CByte(goodByte)
Console.WriteLine(byteFromBigInteger)

' Handle conversion that should result in overflow.
Try
   byteFromBigInteger = CType(badByte, Byte)
   Console.WriteLine(byteFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badByte, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCByte 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 Byte ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 Byte 值中不會遺失精確度。

適用於

Explicit(Half to BigInteger)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

明確將值轉換成 Half 大整數。

public:
 static explicit operator System::Numerics::BigInteger(Half value);

public static explicit operator System.Numerics.BigInteger (Half value);

static member op_Explicit : Half -> System.Numerics.BigInteger

Public Shared Narrowing Operator CType (value As Half) As BigInteger

參數

value: Half

要進行轉換的值。

傳回

BigInteger

value 轉換成大整數。

適用於

Explicit(Double to BigInteger)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 Double 值到 BigInteger 值的明確轉換。

public:
 static explicit operator System::Numerics::BigInteger(double value);

public static explicit operator System.Numerics.BigInteger (double value);

static member op_Explicit : double -> System.Numerics.BigInteger

Public Shared Narrowing Operator CType (value As Double) As BigInteger

參數

value: Double

要轉換為 BigInteger 的值。

傳回

BigInteger

物件，包含 value 參數的值。

例外狀況

OverflowException

value 為 NaN、PositiveInfinity 或 NegativeInfinity。

範例

下列範例會將值 BigInteger 陣列 Double 中的個別元素轉換成物件，然後顯示每個轉換的結果。請注意，在轉換期間，值的任何小數部分 Double 會截斷。

double[] doubles = { Double.MinValue, -1.430955172e03, 2.410970032e05,
                     Double.MaxValue, Double.PositiveInfinity,
                     Double.NegativeInfinity, Double.NaN };
BigInteger number;

Console.WriteLine("{0,37} {1,37}\n", "Double", "BigInteger");

foreach (double value in doubles)
{
   try {
      number = (BigInteger) value;
      Console.WriteLine("{0,37} {1,37}", value, number);
   }
   catch (OverflowException) {
      Console.WriteLine("{0,37} {1,37}", value, "OverflowException");
   }
}
// The example displays the following output:
//                                Double                            BigInteger
//
//                -1.79769313486232E+308  -1.7976931348623157081452742373E+308
//                          -1430.955172                                 -1430
//                           241097.0032                                241097
//                 1.79769313486232E+308   1.7976931348623157081452742373E+308
//                              Infinity                     OverflowException
//                             -Infinity                     OverflowException
//                                   NaN                     OverflowException

let doubles =
    [| Double.MinValue
       -1.430955172e03
       2.410970032e05
       Double.MaxValue
       Double.PositiveInfinity
       Double.NegativeInfinity
       Double.NaN |]

printfn "%37s %37s\n" "Double" "BigInteger"

for value in doubles do
    try
        let number = BigInteger(value)
        printfn "%37O %37O" value number
    with :? OverflowException ->
        printfn "%37O %37s" value "OverflowException"
// The example displays the following output:
//                                Double                            BigInteger
//
//                -1.79769313486232E+308  -1.7976931348623157081452742373E+308
//                          -1430.955172                                 -1430
//                           241097.0032                                241097
//                 1.79769313486232E+308   1.7976931348623157081452742373E+308
//                              Infinity                     OverflowException
//                             -Infinity                     OverflowException
//                                   NaN                     OverflowException

Dim doubles() As Double = { Double.MinValue, -1.430955172e03, 2.410970032e05, 
                            Double.MaxValue, Double.PositiveInfinity, 
                            Double.NegativeInfinity, Double.NaN }
Dim number As BigInteger

Console.WriteLine("{0,37} {1,37}", "Double", "BigInteger")
Console.WriteLine()
For Each value As Double In doubles
   Try
      number = CType(value, BigInteger)
      Console.WriteLine("{0,37} {1,37}", value, number)
   Catch e As OverflowException
      Console.WriteLine("{0,37} {1,37}", value, "OverflowException")
   End Try      
Next
' The example displays the following output:
'                                Double                            BigInteger
' 
'                -1.79769313486232E+308  -1.7976931348623157081452742373E+308
'                          -1430.955172                                 -1430
'                           241097.0032                                241097
'                 1.79769313486232E+308   1.7976931348623157081452742373E+308
'                              Infinity                     OverflowException
'                             -Infinity                     OverflowException
'                                   NaN                     OverflowException

備註

參數的任何小數部分 value 會在轉換之前被截斷。

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。由於從 Double 轉換為 BigInteger 的可能牽涉到截斷的任何小數部分 value ，因此語言編譯器不會自動執行此轉換。相反地，只有在 C#) 中的轉換運算子 (或使用 Visual Basic) 之類的 CType 轉換 (函式時，才會執行轉換。否則，它們會顯示編譯器錯誤。

對於不支援自訂運算子的語言，替代方法是 BigInteger.BigInteger(Double) 。

適用於

Explicit(Decimal to BigInteger)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 Decimal 物件到 BigInteger 值的明確轉換。

public:
 static explicit operator System::Numerics::BigInteger(System::Decimal value);

public static explicit operator System.Numerics.BigInteger (decimal value);

static member op_Explicit : decimal -> System.Numerics.BigInteger

Public Shared Narrowing Operator CType (value As Decimal) As BigInteger

參數

value: Decimal

要轉換為 BigInteger 的值。

傳回

BigInteger

物件，包含 value 參數的值。

範例

下列範例會將值 BigInteger 陣列 Decimal 中的個別元素轉換成物件，然後顯示每個轉換的結果。請注意，在轉換期間，值的任何小數部分 Decimal 會截斷。

decimal[] decimals = { Decimal.MinValue, -15632.991m, 9029321.12m,
                       Decimal.MaxValue };
BigInteger number;

Console.WriteLine("{0,35} {1,35}\n", "Decimal", "BigInteger");

foreach (decimal value in decimals)
{
   number = (BigInteger) value;
   Console.WriteLine("{0,35} {1,35}", value, number);
}
// The example displays the following output:
//
//                          Decimal                          BigInteger
//
//    -79228162514264337593543950335      -79228162514264337593543950335
//                       -15632.991                              -15632
//                       9029321.12                             9029321
//    79228162514264337593543950335       79228162514264337593543950335

let decimals = [| Decimal.MinValue; -15632.991m; 9029321.12m; Decimal.MaxValue |]

printfn "%35s %35s\n" "Decimal" "BigInteger"

for value in decimals do
    let number = BigInteger(value)
    printfn "%35O %35O" value number
// The example displays the following output:
//
//                          Decimal                          BigInteger
//
//    -79228162514264337593543950335      -79228162514264337593543950335
//                       -15632.991                              -15632
//                       9029321.12                             9029321
//    79228162514264337593543950335       79228162514264337593543950335

' Explicit Decimal to BigInteger conversion
Dim decimals() As Decimal = { Decimal.MinValue, -15632.991d, 9029321.12d, 
                              Decimal.MaxValue }
Dim number As BigInteger 

Console.WriteLine("{0,35} {1,35}", "Decimal", "BigInteger")
Console.WriteLine()
For Each value As Decimal In decimals
   number = CType(value, BigInteger)
   Console.WriteLine("{0,35} {1,35}",
                     value, number)
Next
' The example displays the following output:
'
'                          Decimal                          BigInteger
'    
'    -79228162514264337593543950335      -79228162514264337593543950335
'                       -15632.991                              -15632
'                       9029321.12                             9029321
'    79228162514264337593543950335       79228162514264337593543950335

備註

參數的任何小數部分 value 會在轉換之前被截斷。

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。由於從 Decimal 轉換為 BigInteger 的可能牽涉到截斷的任何小數部分 value ，因此語言編譯器不會自動執行此轉換。相反地，只有在 C#) 中的轉換運算子 (或使用 Visual Basic) 之類的 CType 轉換 (函式時，才會執行轉換。否則，它們會顯示編譯器錯誤。

對於不支援自訂運算子的語言，替代方法是 BigInteger.BigInteger(Decimal) 。

適用於

Explicit(BigInteger to Int32)

來源:: BigInteger.cs

來源:: BigInteger.cs

來源:: BigInteger.cs

定義從 BigInteger 物件到 32 位元帶正負號整數值的明確轉換。

public:
 static explicit operator int(System::Numerics::BigInteger value);

public static explicit operator int (System.Numerics.BigInteger value);

static member op_Explicit : System.Numerics.BigInteger -> int

Public Shared Narrowing Operator CType (value As BigInteger) As Integer

參數

value: BigInteger

要轉換為 32 位元帶正負號整數的值。

傳回

Int32

物件，包含 value 參數的值。

例外狀況

OverflowException

value 小於 Int32.MinValue 或大於 Int32.MaxValue。

範例

下列範例說明如何將 BigInteger Int32 轉換成值。它也會處理 OverflowException 擲回的，因為 BigInteger 值超出資料類型的範圍 Int32 。

// BigInteger to Int32 conversion.
BigInteger goodInteger = 200000;
BigInteger badInteger = 65000000000;

int integerFromBigInteger;

// Successful conversion using cast operator.
integerFromBigInteger = (int) goodInteger;
Console.WriteLine(integerFromBigInteger);

// Handle conversion that should result in overflow.
try
{
   integerFromBigInteger = (int) badInteger;
   Console.WriteLine(integerFromBigInteger);
}
catch (OverflowException e)
{
   Console.WriteLine("Unable to convert {0}:\n   {1}",
                     badInteger, e.Message);
}
Console.WriteLine();

// BigInteger to Int32 conversion.
let goodInteger = bigint 200000
let badInteger = bigint 65000000000L

// Successful conversion using cast operator.
let integerFromBigInteger = int goodInteger
printfn $"{integerFromBigInteger}"

// Handle conversion that should result in overflow.
try
    let integerFromBigInteger = int badInteger
    printfn $"{integerFromBigInteger}"
with :? OverflowException as e ->
    printfn $"Unable to convert {badInteger}:\n   {e.Message}"

' BigInteger to Int32 conversion.
Dim goodInteger As BigInteger = 200000
Dim badInteger As BigInteger = 65000000000

Dim integerFromBigInteger As Integer

' Convert using CType function.
integerFromBigInteger = CType(goodInteger, Integer)
Console.WriteLine(integerFromBigInteger)
' Convert using CInt function.
integerFromBigInteger = CInt(goodInteger)
Console.WriteLIne(integerFromBigInteger)

' Handle conversion that should result in overflow.
Try
   integerFromBigInteger = CType(badInteger, Integer)
   Console.WriteLine(integerFromBigInteger)
Catch e As OverflowException
   Console.WriteLine("Unable to convert {0}:{1}   {2}", _
                     badInteger, vbCrLf, e.Message)
End Try
Console.WriteLine()

備註

方法的多 Explicit(Decimal to BigInteger) 載會定義可以轉換物件之或來源 BigInteger 的類型。語言編譯器不會自動執行此轉換，因為它可能會牽涉到資料遺失。相反地，只有在使用 C# ) 中的轉換運算子 (或轉換函式 (，例如 CTypeCInt 或 Visual Basic) 時，才會執行轉換。否則，它們會顯示編譯器錯誤。

由於此作業會定義縮小轉換，因此如果 BigInteger 值超出資料類型的範圍 Int32 ，它可以在執行時間擲 OverflowException 回。如果轉換成功，則結果 Int32 值中不會遺失精確度。

適用於

共用方式為

BigInteger.Explicit 運算子

定義

多載

Explicit(BigInteger to SByte)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(Single to BigInteger)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(Complex to BigInteger)

參數

傳回

適用於

Explicit(BigInteger to UIntPtr)

參數

傳回

適用於

Explicit(BigInteger to UInt64)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(BigInteger to UInt32)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(BigInteger to UInt16)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(BigInteger to UInt128)

參數

傳回

適用於

Explicit(BigInteger to Single)

參數

傳回

範例

備註

適用於

Explicit(BigInteger to IntPtr)

參數

傳回

適用於

Explicit(BigInteger to Int64)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(BigInteger to Int16)

參數

傳回

例外狀況

範例

備註

適用於

Explicit(BigInteger to Int128)

參數

傳回

適用於

Explicit(BigInteger to Half)