Decimal.Explicit 运算符
定义
重载
| Explicit(Single to Decimal) |
定义从单精度浮点数到 Decimal 的显式转换。Defines an explicit conversion of a single-precision floating-point number to a Decimal. |
| Explicit(Double to Decimal) |
定义从双精度浮点数到 Decimal 的显式转换。Defines an explicit conversion of a double-precision floating-point number to a Decimal. |
| Explicit(Decimal to UInt32) |
定义从 Decimal 到 32 位无符号整数的显式转换。Defines an explicit conversion of a Decimal to a 32-bit unsigned integer. 此 API 不兼容 CLS。This API is not CLS-compliant. |
| Explicit(Decimal to UInt16) |
定义从 Decimal 到 16 位无符号整数的显式转换。Defines an explicit conversion of a Decimal to a 16-bit unsigned integer. 此 API 不兼容 CLS。This API is not CLS-compliant. |
| Explicit(Decimal to Single) |
定义从 Decimal 到单精度浮点数的显式转换。Defines an explicit conversion of a Decimal to a single-precision floating-point number. |
| Explicit(Decimal to SByte) |
定义从 Decimal 到 8 位有符号整数的显式转换。Defines an explicit conversion of a Decimal to an 8-bit signed integer. 此 API 不兼容 CLS。This API is not CLS-compliant. |
| Explicit(Decimal to UInt64) |
定义从 Decimal 到 64 位无符号整数的显式转换。Defines an explicit conversion of a Decimal to a 64-bit unsigned integer. 此 API 不兼容 CLS。This API is not CLS-compliant. |
| Explicit(Decimal to Int32) |
定义从 Decimal 到 32 位有符号整数的显式转换。Defines an explicit conversion of a Decimal to a 32-bit signed integer. |
| Explicit(Decimal to Int16) |
定义从 Decimal 到 16 位有符号整数的显式转换。Defines an explicit conversion of a Decimal to a 16-bit signed integer. |
| Explicit(Decimal to Double) |
定义从 Decimal 到双精度浮点数的显式转换。Defines an explicit conversion of a Decimal to a double-precision floating-point number. |
| Explicit(Decimal to Char) |
定义从 Unicode 字符到 Decimal 的显式转换。Defines an explicit conversion of a Decimal to a Unicode character. |
| Explicit(Decimal to Byte) |
定义从 Decimal 到 8 位无符号整数的显式转换。Defines an explicit conversion of a Decimal to an 8-bit unsigned integer. |
| Explicit(Decimal to Int64) |
定义从 Decimal 到 64 位有符号整数的显式转换。Defines an explicit conversion of a Decimal to a 64-bit signed integer. |
Explicit(Single to Decimal)
public:
static explicit operator System::Decimal(float value);public static explicit operator decimal (float value);static member op_Explicit : single -> decimalPublic Shared Narrowing Operator CType (value As Single) As Decimal参数
- value
- Single
要转换的单精度浮点数。The single-precision floating-point number to convert.
返回
已转换的单精度浮点数。The converted single-precision floating point number.
例外
value 大于 MaxValue 或小于 MinValue。value is greater than MaxValue or less than MinValue.
- 或 --or-
value 为 NaN、PositiveInfinity 或 NegativeInfinity。value is NaN, PositiveInfinity, or NegativeInfinity.
示例
下面的示例 Single Decimal 使用 Single to 转换运算符将值转换为数字 Decimal 。The following example converts Single values to Decimal numbers by using the Single to Decimal conversion operator. 此转换需要 Visual Basic 中的 op_Explicit 运算符。This conversion requires the op_Explicit operator in Visual Basic.
// Example of the explicit conversion from float to Decimal.
using namespace System;
#define formatter "{0,16:E7}{1,33}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the float argument; catch exceptions that are thrown.
void DecimalFromSingle( float argument )
{
Object^ decValue;
// Convert the float argument to a Decimal value.
try
{
decValue = (Decimal)argument;
}
catch ( Exception^ ex )
{
decValue = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, decValue );
}
int main()
{
Console::WriteLine( "This example of the explicit conversion from float "
"to Decimal \ngenerates the following output.\n" );
Console::WriteLine( formatter, "float argument", "Decimal value" );
Console::WriteLine( formatter, "--------------", "-------------" );
// Convert float values and display the results.
DecimalFromSingle( 1.2345E-30F );
DecimalFromSingle( 1.2345E-26F );
DecimalFromSingle( 1.23456E-22F );
DecimalFromSingle( 1.23456E-12F );
DecimalFromSingle( 1.234567F );
DecimalFromSingle( 1.234567E+12F );
DecimalFromSingle( 1.2345678E+28F );
DecimalFromSingle( 1.2345678E+30F );
}
/*
This example of the explicit conversion from float to Decimal
generates the following output.
float argument Decimal value
-------------- -------------
1.2345000E-030 0
1.2345000E-026 0.0000000000000000000000000123
1.2345600E-022 0.000000000000000000000123456
1.2345600E-012 0.00000000000123456
1.2345671E+000 1.234567
1.2345670E+012 1234567000000
1.2345678E+028 12345680000000000000000000000
1.2345678E+030 OverflowException
*/
// Example of the explicit conversion from float to decimal.
using System;
class DecimalFromSingleDemo
{
const string formatter = "{0,16:E7}{1,33}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the float argument; catch exceptions that are thrown.
public static void DecimalFromSingle( float argument )
{
object decValue;
// Convert the float argument to a decimal value.
try
{
decValue = (decimal)argument;
}
catch( Exception ex )
{
decValue = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument, decValue );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversion from float " +
"to decimal \ngenerates the following output.\n" );
Console.WriteLine( formatter, "float argument",
"decimal value" );
Console.WriteLine( formatter, "--------------",
"-------------" );
// Convert float values and display the results.
DecimalFromSingle( 1.2345E-30F );
DecimalFromSingle( 1.2345E-26F );
DecimalFromSingle( 1.23456E-22F );
DecimalFromSingle( 1.23456E-12F );
DecimalFromSingle( 1.234567F );
DecimalFromSingle( 1.234567E+12F );
DecimalFromSingle( 1.2345678E+28F );
DecimalFromSingle( 1.2345678E+30F );
}
}
/*
This example of the explicit conversion from float to decimal
generates the following output.
float argument decimal value
-------------- -------------
1.2345000E-030 0
1.2345000E-026 0.0000000000000000000000000123
1.2345600E-022 0.000000000000000000000123456
1.2345600E-012 0.00000000000123456
1.2345671E+000 1.234567
1.2345670E+012 1234567000000
1.2345678E+028 12345680000000000000000000000
1.2345678E+030 OverflowException
*/
' Example of the explicit conversion from Single to Decimal.
Module DecimalFromSingleDemo
Const formatter As String = "{0,16:E7}{1,33}"
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
' Convert the Single argument; catch exceptions that are thrown.
Sub DecimalFromSingle( argument As Single )
Dim decValue As Object
' Convert the Single argument to a Decimal value.
Try
decValue = Decimal.op_Explicit( argument )
Catch ex As Exception
decValue = GetExceptionType( ex )
End Try
' Display the Decimal.
Console.WriteLine( formatter, argument, decValue )
End Sub
Sub Main( )
Console.WriteLine( _
"This example of the explicit conversion from Single " & _
"to Decimal " & vbCrLf & "generates the following " & _
"output." & vbCrLf )
Console.WriteLine( formatter, "Single argument", _
"Decimal value" )
Console.WriteLine( formatter, "---------------", _
"-------------" )
' Convert Single values and display the results.
DecimalFromSingle( 1.2345E-30 )
DecimalFromSingle( 1.2345E-26 )
DecimalFromSingle( 1.23456E-22 )
DecimalFromSingle( 1.23456E-12 )
DecimalFromSingle( 1.234567 )
DecimalFromSingle( 1.234567E+12 )
DecimalFromSingle( 1.2345678E+28 )
DecimalFromSingle( 1.2345678E+30 )
End Sub
End Module
' This example of the explicit conversion from Single to Decimal
' generates the following output.
'
' Single argument Decimal value
' --------------- -------------
' 1.2345000E-030 0
' 1.2345000E-026 0.0000000000000000000000000123
' 1.2345600E-022 0.000000000000000000000123456
' 1.2345600E-012 0.00000000000123456
' 1.2345671E+000 1.234567
' 1.2345670E+012 1234567000000
' 1.2345678E+028 12345680000000000000000000000
' 1.2345678E+030 OverflowException
另请参阅
适用于
Explicit(Double to Decimal)
public:
static explicit operator System::Decimal(double value);public static explicit operator decimal (double value);static member op_Explicit : double -> decimalPublic Shared Narrowing Operator CType (value As Double) As Decimal参数
- value
- Double
要转换的双精度浮点数。The double-precision floating-point number to convert.
返回
已转换的双精度浮点数。The converted double-precision floating point number.
例外
value 大于 MaxValue 或小于 MinValue。value is greater than MaxValue or less than MinValue.
- 或 --or-
value 为 NaN、PositiveInfinity 或 NegativeInfinity。value is NaN, PositiveInfinity, or NegativeInfinity.
示例
下面的示例 Double Decimal 使用 Double to 转换运算符将值转换为数字 Decimal 。The following example converts Double values to Decimal numbers by using the Double to Decimal conversion operator. 此转换需要 Visual Basic 中的 op_Explicit 运算符。This conversion requires the op_Explicit operator in Visual Basic.
// Example of the explicit conversion from double to Decimal.
using namespace System;
#define formatter "{0,25:E16}{1,33}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the double argument; catch exceptions that are thrown.
void DecimalFromDouble( double argument )
{
Object^ decValue;
// Convert the double argument to a Decimal value.
try
{
decValue = (Decimal)argument;
}
catch ( Exception^ ex )
{
decValue = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, decValue );
}
int main()
{
Console::WriteLine( "This example of the explicit conversion from double "
"to Decimal \ngenerates the following output.\n" );
Console::WriteLine( formatter, "double argument", "Decimal value" );
Console::WriteLine( formatter, "---------------", "-------------" );
// Convert double values and display the results.
DecimalFromDouble( 1.234567890123E-30 );
DecimalFromDouble( 1.2345678901234E-25 );
DecimalFromDouble( 1.23456789012345E-20 );
DecimalFromDouble( 1.234567890123456E-10 );
DecimalFromDouble( 1.2345678901234567 );
DecimalFromDouble( 1.23456789012345678E+12 );
DecimalFromDouble( 1.234567890123456789E+28 );
DecimalFromDouble( 1.234567890123456789E+30 );
}
/*
This example of the explicit conversion from double to Decimal
generates the following output.
double argument Decimal value
--------------- -------------
1.2345678901230000E-030 0
1.2345678901233999E-025 0.0000000000000000000000001235
1.2345678901234499E-020 0.0000000000000000000123456789
1.2345678901234560E-010 0.000000000123456789012346
1.2345678901234567E+000 1.23456789012346
1.2345678901234568E+012 1234567890123.46
1.2345678901234568E+028 12345678901234600000000000000
1.2345678901234569E+030 OverflowException
*/
// Example of the explicit conversion from double to decimal.
using System;
class DecimalFromDoubleDemo
{
const string formatter = "{0,25:E16}{1,33}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the double argument; catch exceptions that are thrown.
public static void DecimalFromDouble( double argument )
{
object decValue;
// Convert the double argument to a decimal value.
try
{
decValue = (decimal)argument;
}
catch( Exception ex )
{
decValue = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument, decValue );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversion from double " +
"to decimal \ngenerates the following output.\n" );
Console.WriteLine( formatter, "double argument",
"decimal value" );
Console.WriteLine( formatter, "---------------",
"-------------" );
// Convert double values and display the results.
DecimalFromDouble( 1.234567890123E-30 );
DecimalFromDouble( 1.2345678901234E-25 );
DecimalFromDouble( 1.23456789012345E-20 );
DecimalFromDouble( 1.234567890123456E-10 );
DecimalFromDouble( 1.2345678901234567 );
DecimalFromDouble( 1.23456789012345678E+12 );
DecimalFromDouble( 1.234567890123456789E+28 );
DecimalFromDouble( 1.234567890123456789E+30 );
}
}
/*
This example of the explicit conversion from double to decimal
generates the following output.
double argument decimal value
--------------- -------------
1.2345678901230000E-030 0
1.2345678901233999E-025 0.0000000000000000000000001235
1.2345678901234499E-020 0.0000000000000000000123456789
1.2345678901234560E-010 0.000000000123456789012346
1.2345678901234567E+000 1.23456789012346
1.2345678901234568E+012 1234567890123.46
1.2345678901234568E+028 12345678901234600000000000000
1.2345678901234569E+030 OverflowException
*/
' Example of the explicit conversion from Double to Decimal.
Module DecimalFromDoubleDemo
Const formatter As String = "{0,25:E16}{1,33}"
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
' Convert the Double argument; catch exceptions that are thrown.
Sub DecimalFromDouble( argument As Double )
Dim decValue As Object
' Convert the Double argument to a Decimal value.
Try
decValue = Decimal.op_Explicit( argument )
Catch ex As Exception
decValue = GetExceptionType( ex )
End Try
' Display the Decimal.
Console.WriteLine( formatter, argument, decValue )
End Sub
Sub Main( )
Console.WriteLine( _
"This example of the explicit conversion from Double " & _
"to Decimal " & vbCrLf & "generates the following " & _
"output." & vbCrLf )
Console.WriteLine( formatter, "Double argument", _
"Decimal value" )
Console.WriteLine( formatter, "---------------", _
"-------------" )
' Convert Double values and display the results.
DecimalFromDouble( 1.234567890123E-30 )
DecimalFromDouble( 1.2345678901234E-25 )
DecimalFromDouble( 1.23456789012345E-20 )
DecimalFromDouble( 1.234567890123456E-10 )
DecimalFromDouble( 1.2345678901234567 )
DecimalFromDouble( 1.23456789012345678E+12 )
DecimalFromDouble( 1.234567890123456789E+28 )
DecimalFromDouble( 1.234567890123456789E+30 )
End Sub
End Module
' This example of the explicit conversion from Double to Decimal
' generates the following output.
'
' Double argument Decimal value
' --------------- -------------
' 1.2345678901230000E-030 0
' 1.2345678901233999E-025 0.0000000000000000000000001235
' 1.2345678901234499E-020 0.0000000000000000000123456789
' 1.2345678901234560E-010 0.000000000123456789012346
' 1.2345678901234567E+000 1.23456789012346
' 1.2345678901234568E+012 1234567890123.46
' 1.2345678901234568E+028 12345678901234600000000000000
' 1.2345678901234569E+030 OverflowException
另请参阅
适用于
Explicit(Decimal to UInt32)
public:
static explicit operator System::UInt32(System::Decimal value);[System.CLSCompliant(false)]
public static explicit operator uint (decimal value);[<System.CLSCompliant(false)>]
static member op_Explicit : decimal -> uint32Public Shared Narrowing Operator CType (value As Decimal) As UInteger参数
- value
- Decimal
要转换的值。The value to convert.
返回
32 位无符号整数，它表示转换后的 Decimal。A 32-bit unsigned integer that represents the converted Decimal.
- 属性
例外
示例
下面的示例 Decimal UInt32 使用 explicit Decimal to 转换运算符将数字转换为值 UInt32 。The following example converts Decimal numbers to UInt32 values by using the explicit Decimal to UInt32 conversion operator.
// Example of the explicit conversions from Decimal to int and
// Decimal to unsigned int.
using namespace System;
#define formatter "{0,17}{1,19}{2,19}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int32( Decimal argument )
{
Object^ Int32Value;
Object^ UInt32Value;
// Convert the argument to an int value.
try
{
Int32Value = (int)argument;
}
catch ( Exception^ ex )
{
Int32Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned int value.
try
{
UInt32Value = (unsigned int)argument;
}
catch ( Exception^ ex )
{
UInt32Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int32Value, UInt32Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"int \nand Decimal to unsigned int generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "int", "unsigned int" );
Console::WriteLine( formatter, "----------------", "---", "------------" );
// Convert Decimal values and display the results.
DecimalToU_Int32( Decimal::Parse( "123" ) );
DecimalToU_Int32( Decimal(123000,0,0,false,3) );
DecimalToU_Int32( Decimal::Parse( "123.999" ) );
DecimalToU_Int32( Decimal::Parse( "4294967295.999" ) );
DecimalToU_Int32( Decimal::Parse( "4294967296" ) );
DecimalToU_Int32( Decimal::Parse( "2147483647.999" ) );
DecimalToU_Int32( Decimal::Parse( "2147483648" ) );
DecimalToU_Int32( Decimal::Parse( "-0.999" ) );
DecimalToU_Int32( Decimal::Parse( "-1" ) );
DecimalToU_Int32( Decimal::Parse( "-2147483648.999" ) );
DecimalToU_Int32( Decimal::Parse( "-2147483649" ) );
}
/*
This example of the explicit conversions from Decimal to int
and Decimal to unsigned int generates the following output.
It displays several converted Decimal values.
Decimal argument int unsigned int
---------------- --- ------------
123 123 123
123.000 123 123
123.999 123 123
4294967295.999 OverflowException 4294967295
4294967296 OverflowException OverflowException
2147483647.999 2147483647 2147483647
2147483648 OverflowException 2147483648
-0.999 0 0
-1 -1 OverflowException
-2147483648.999 -2147483648 OverflowException
-2147483649 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to int and
// decimal to uint.
using System;
class DecimalToU_Int32Demo
{
const string formatter = "{0,17}{1,19}{2,19}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int32( decimal argument )
{
object Int32Value;
object UInt32Value;
// Convert the argument to an int value.
try
{
Int32Value = (int)argument;
}
catch( Exception ex )
{
Int32Value = GetExceptionType( ex );
}
// Convert the argument to a uint value.
try
{
UInt32Value = (uint)argument;
}
catch( Exception ex )
{
UInt32Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int32Value, UInt32Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to int \nand decimal to uint generates the following " +
"output. It displays \nseveral converted decimal " +
"values.\n" );
Console.WriteLine( formatter, "decimal argument",
"int/exception", "uint/exception" );
Console.WriteLine( formatter, "----------------",
"-------------", "--------------" );
// Convert decimal values and display the results.
DecimalToU_Int32( 123M );
DecimalToU_Int32( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int32( 123.999M );
DecimalToU_Int32( 4294967295.999M );
DecimalToU_Int32( 4294967296M );
DecimalToU_Int32( 2147483647.999M );
DecimalToU_Int32( 2147483648M );
DecimalToU_Int32( - 0.999M );
DecimalToU_Int32( - 1M );
DecimalToU_Int32( - 2147483648.999M );
DecimalToU_Int32( - 2147483649M );
}
}
/*
This example of the explicit conversions from decimal to int
and decimal to uint generates the following output. It displays
several converted decimal values.
decimal argument int/exception uint/exception
---------------- ------------- --------------
123 123 123
123.000 123 123
123.999 123 123
4294967295.999 OverflowException 4294967295
4294967296 OverflowException OverflowException
2147483647.999 2147483647 2147483647
2147483648 OverflowException 2147483648
-0.999 0 0
-1 -1 OverflowException
-2147483648.999 -2147483648 OverflowException
-2147483649 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Integer and
' Decimal to UInteger.
Module DecimalToU_Int32Demo
Const formatter As String = "{0,17}{1,19}{2,19}"
' Convert the decimal argument catch exceptions that are thrown.
Public Sub DecimalToU_Int32(argument As Decimal)
Dim Int32Value As Object
Dim UInt32Value As Object
' Convert the argument to an int value.
Try
Int32Value = CInt(argument)
Catch ex As Exception
Int32Value = ex.GetType().Name
End Try
' Convert the argument to a uint value.
Try
UInt32Value = CUInt(argument)
Catch ex As Exception
UInt32Value = ex.GetType().Name
End Try
Console.WriteLine(formatter, argument, _
Int32Value, UInt32Value)
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal Argument", _
"Integer/Exception", "UInteger/Exception" )
Console.WriteLine( formatter, "----------------", _
"-------------", "--------------" )
' Convert decimal values and display the results.
DecimalToU_Int32( 123d)
DecimalToU_Int32(New Decimal(123000, 0, 0, False, 3))
DecimalToU_Int32(123.999d)
DecimalToU_Int32(4294967295.999d)
DecimalToU_Int32(4294967296d)
DecimalToU_Int32(2147483647.999d)
DecimalToU_Int32(2147483648d)
DecimalToU_Int32(-0.999d)
DecimalToU_Int32(-1d)
DecimalToU_Int32(-2147483648.999d)
DecimalToU_Int32(-2147483649d)
End Sub
End Module
' The example displays the following output to the console:
' Decimal Argument Integer/Exception UInteger/Exception
' ---------------- ------------- --------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 4294967295.999 OverflowException OverflowException
' 4294967296 OverflowException OverflowException
' 2147483647.999 OverflowException 2147483648
' 2147483648 OverflowException 2147483648
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -2147483648.999 OverflowException OverflowException
' -2147483649 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 UInt32 。This operator supports the explicit conversion of a Decimal to a UInt32. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal UInt32 使用 c # 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a UInt32 value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToUInt32(Decimal) 或 Convert.ToUInt32(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToUInt32(Decimal) or the Convert.ToUInt32(Decimal) method.
另请参阅
适用于
Explicit(Decimal to UInt16)
重要
此 API 不符合 CLS。
public:
static explicit operator System::UInt16(System::Decimal value);[System.CLSCompliant(false)]
public static explicit operator ushort (decimal value);[<System.CLSCompliant(false)>]
static member op_Explicit : decimal -> uint16Public Shared Narrowing Operator CType (value As Decimal) As UShort参数
- value
- Decimal
要转换的值。The value to convert.
返回
16 位无符号整数，它表示转换后的 Decimal。A 16-bit unsigned integer that represents the converted Decimal.
- 属性
例外
示例
下面的示例 Decimal UInt16 使用 explicit Decimal to 转换运算符将数字转换为值 UInt16 。The following example converts Decimal numbers to UInt16 values by using the explicit Decimal to UInt16 conversion operator.
// Example of the explicit conversions from Decimal to short and
// Decimal to unsigned short.
using namespace System;
#define formatter "{0,16}{1,19}{2,19}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int16( Decimal argument )
{
Object^ Int16Value;
Object^ UInt16Value;
// Convert the argument to a short value.
try
{
Int16Value = (short)argument;
}
catch ( Exception^ ex )
{
Int16Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned short value.
try
{
UInt16Value = (unsigned short)argument;
}
catch ( Exception^ ex )
{
UInt16Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int16Value, UInt16Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"short \nand Decimal to unsigned short generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "short", "unsigned short" );
Console::WriteLine( formatter, "----------------", "-----", "--------------" );
// Convert Decimal values and display the results.
DecimalToU_Int16( Decimal::Parse( "123" ) );
DecimalToU_Int16( Decimal(123000,0,0,false,3) );
DecimalToU_Int16( Decimal::Parse( "123.999" ) );
DecimalToU_Int16( Decimal::Parse( "65535.999" ) );
DecimalToU_Int16( Decimal::Parse( "65536" ) );
DecimalToU_Int16( Decimal::Parse( "32767.999" ) );
DecimalToU_Int16( Decimal::Parse( "32768" ) );
DecimalToU_Int16( Decimal::Parse( "-0.999" ) );
DecimalToU_Int16( Decimal::Parse( "-1" ) );
DecimalToU_Int16( Decimal::Parse( "-32768.999" ) );
DecimalToU_Int16( Decimal::Parse( "-32769" ) );
}
/*
This example of the explicit conversions from Decimal to short
and Decimal to unsigned short generates the following output.
It displays several converted Decimal values.
Decimal argument short unsigned short
---------------- ----- --------------
123 123 123
123.000 123 123
123.999 123 123
65535.999 OverflowException 65535
65536 OverflowException OverflowException
32767.999 32767 32767
32768 OverflowException 32768
-0.999 0 0
-1 -1 OverflowException
-32768.999 -32768 OverflowException
-32769 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to short and
// decimal to ushort.
using System;
class DecimalToU_Int16Demo
{
const string formatter = "{0,16}{1,19}{2,19}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int16( decimal argument )
{
object Int16Value;
object UInt16Value;
// Convert the argument to a short value.
try
{
Int16Value = (short)argument;
}
catch( Exception ex )
{
Int16Value = GetExceptionType( ex );
}
// Convert the argument to a ushort value.
try
{
UInt16Value = (ushort)argument;
}
catch( Exception ex )
{
UInt16Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int16Value, UInt16Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to short \nand decimal to ushort generates the " +
"following output. It displays \nseveral converted " +
"decimal values.\n" );
Console.WriteLine( formatter, "decimal argument",
"short/exception", "ushort/exception" );
Console.WriteLine( formatter, "----------------",
"---------------", "----------------" );
// Convert decimal values and display the results.
DecimalToU_Int16( 123M );
DecimalToU_Int16( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int16( 123.999M );
DecimalToU_Int16( 65535.999M );
DecimalToU_Int16( 65536M );
DecimalToU_Int16( 32767.999M );
DecimalToU_Int16( 32768M );
DecimalToU_Int16( - 0.999M );
DecimalToU_Int16( - 1M );
DecimalToU_Int16( - 32768.999M );
DecimalToU_Int16( - 32769M );
}
}
/*
This example of the explicit conversions from decimal to short
and decimal to ushort generates the following output. It displays
several converted decimal values.
decimal argument short/exception ushort/exception
---------------- --------------- ----------------
123 123 123
123.000 123 123
123.999 123 123
65535.999 OverflowException 65535
65536 OverflowException OverflowException
32767.999 32767 32767
32768 OverflowException 32768
-0.999 0 0
-1 -1 OverflowException
-32768.999 -32768 OverflowException
-32769 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Short and
' Decimal to UShort.
Module DecimalToU_Int16Demo
Const formatter As String = "{0,16}{1,19}{2,19}"
' Convert the decimal argument and catch exceptions that are thrown.
Public Sub DecimalToU_Int16(argument As Decimal)
Dim Int16Value As Object
Dim UInt16Value As Object
' Convert the argument to a Short value.
Try
Int16Value = CShort(argument)
Catch ex As Exception
Int16Value = ex.GetType().Name
End Try
' Convert the argument to a UShort value.
Try
UInt16Value = CUShort(argument)
Catch ex As Exception
UInt16Value = ex.GetType().Name
End Try
Console.WriteLine( formatter, argument, _
Int16Value, UInt16Value )
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal argument", _
"Short/Exception", "UShort/Exception" )
Console.WriteLine( formatter, "----------------", _
"---------------", "----------------" )
' Convert decimal values and display the results.
DecimalToU_Int16(123d)
DecimalToU_Int16(New Decimal( 123000, 0, 0, False, 3 ))
DecimalToU_Int16(123.999d)
DecimalToU_Int16(65535.999d)
DecimalToU_Int16(65536d)
DecimalToU_Int16(32767.999d)
DecimalToU_Int16(32768d)
DecimalToU_Int16(-0.999d)
DecimalToU_Int16(-1d)
DecimalToU_Int16(-32768.999d)
DecimalToU_Int16(-32769d)
End Sub
End Module
' This example displays the following output to the console:
' Decimal argument Short/Exception UShort/Exception
' ---------------- --------------- ----------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 65535.999 OverflowException OverflowException
' 65536 OverflowException OverflowException
' 32767.999 OverflowException 32768
' 32768 OverflowException 32768
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -32768.999 OverflowException OverflowException
' -32769 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 UInt16 。This operator supports the explicit conversion of a Decimal to a UInt16. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal UInt16 使用 c # 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a UInt16 value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToUInt16(Decimal) 或 Convert.ToUInt16(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToUInt16(Decimal) or the Convert.ToUInt16(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Single)
public:
static explicit operator float(System::Decimal value);public static explicit operator float (decimal value);static member op_Explicit : decimal -> singlePublic Shared Narrowing Operator CType (value As Decimal) As Single参数
- value
- Decimal
要转换的值。The value to convert.
返回
单精度浮点数，它表示转换后的 Decimal。A single-precision floating-point number that represents the converted Decimal.
示例
下面的示例 Decimal Single 使用 explicit Decimal to 转换运算符将数字转换为值 Single 。The following example converts Decimal numbers to Single values by using the explicit Decimal to Single conversion operator.
using namespace System;
void main()
{
// Define an array of Decimal values.
array<Decimal>^ values = { Decimal::Parse("0.0000000000000000000000000001"),
Decimal::Parse("0.0000000000123456789123456789"),
Decimal::Parse("123"),
Decimal(123000000, 0, 0, false, 6),
Decimal::Parse("123456789.123456789"),
Decimal::Parse("123456789123456789123456789"),
Decimal::MinValue, Decimal::MaxValue };
// Convert each value to a double.
for each (Decimal value in values) {
float dblValue = (float) value;
Console::WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType()->Name, dblValue,
dblValue.GetType()->Name);
}
}
// The example displays the following output:
// 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Single)
// 0.0000000000123456789123456789 (Decimal) --> 1.234568E-11 (Single)
// 123 (Decimal) --> 123 (Single)
// 123.000000 (Decimal) --> 123 (Single)
// 123456789.123456789 (Decimal) --> 1.234568E+08 (Single)
// 123456789123456789123456789 (Decimal) --> 1.234568E+26 (Single)
// -79228162514264337593543950335 (Decimal) --> -7.922816E+28 (Single)
// 79228162514264337593543950335 (Decimal) --> 7.922816E+28 (Single)
using System;
class Example
{
public static void Main( )
{
// Define an array of decimal values.
decimal[] values = { 0.0000000000000000000000000001M,
0.0000000000123456789123456789M,
123M, new decimal(123000000, 0, 0, false, 6),
123456789.123456789M,
123456789123456789123456789M,
decimal.MinValue, decimal.MaxValue };
// Convert each value to a double.
foreach (var value in values) {
float dblValue = (float) value;
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, dblValue,
dblValue.GetType().Name);
}
}
}
// The example displays the following output:
// 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Single)
// 0.0000000000123456789123456789 (Decimal) --> 1.234568E-11 (Single)
// 123 (Decimal) --> 123 (Single)
// 123.000000 (Decimal) --> 123 (Single)
// 123456789.123456789 (Decimal) --> 1.234568E+08 (Single)
// 123456789123456789123456789 (Decimal) --> 1.234568E+26 (Single)
// -79228162514264337593543950335 (Decimal) --> -7.922816E+28 (Single)
// 79228162514264337593543950335 (Decimal) --> 7.922816E+28 (Single)
Module Example
Public Sub Main( )
' Define an array of Decimal values.
Dim values() As Decimal= { 0.0000000000000000000000000001d,
0.0000000000123456789123456789d,
123d,
New Decimal(123000000, 0, 0, False, 6),
123456789.123456789d,
123456789123456789123456789d,
Decimal.MinValue, Decimal.MaxValue }
For Each value In values
Dim dblValue As Single = CSng(value)
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, dblValue,
dblValue.GetType().Name)
Next
End Sub
End Module
' The example displays the following output:
' 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Single)
' 0.0000000000123456789123456789 (Decimal) --> 1.234568E-11 (Single)
' 123 (Decimal) --> 123 (Single)
' 123.000000 (Decimal) --> 123 (Single)
' 123456789.123456789 (Decimal) --> 1.234568E+08 (Single)
' 123456789123456789123456789 (Decimal) --> 1.234568E+26 (Single)
' -79228162514264337593543950335 (Decimal) --> -7.922816E+28 (Single)
' 79228162514264337593543950335 (Decimal) --> 7.922816E+28 (Single)
注解
此操作可能会导致精度损失，因为单精度浮点数的有效位数少于 Decimal 。This operation can result in a loss of precision, because a single-precision floating-point number has fewer significant digits than a Decimal.
此运算符支持将显式转换 Decimal 为 Single 。This operator supports the explicit conversion of a Decimal to a Single. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Single 使用 c # 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a Single value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToSingle(Decimal) 或 Convert.ToSingle(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToSingle(Decimal) or the Convert.ToSingle(Decimal) method.
另请参阅
适用于
Explicit(Decimal to SByte)
public:
static explicit operator System::SByte(System::Decimal value);[System.CLSCompliant(false)]
public static explicit operator sbyte (decimal value);[<System.CLSCompliant(false)>]
static member op_Explicit : decimal -> sbytePublic Shared Narrowing Operator CType (value As Decimal) As SByte参数
- value
- Decimal
要转换的值。The value to convert.
返回
8 位有符号整数，它表示转换后的 Decimal。An 8-bit signed integer that represents the converted Decimal.
- 属性
例外
示例
下面的示例 Decimal SByte 使用 explicit Decimal to 转换运算符将数字转换为值 SByte 。The following example converts Decimal numbers to SByte values by using the explicit Decimal to SByte conversion operator.
using namespace System;
void main()
{
// Define an array of decimal values.
array<Decimal>^ values = { Decimal::Parse("78"),
Decimal(78000,0,0,false,3),
Decimal::Parse("78.999"),
Decimal::Parse("255.999"),
Decimal::Parse("256"),
Decimal::Parse("127.999"),
Decimal::Parse("128"),
Decimal::Parse("-0.999"),
Decimal::Parse("-1"),
Decimal::Parse("-128.999"),
Decimal::Parse("-129") };
for each (Decimal value in values) {
try {
SByte byteValue = (SByte) value;
Console::WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType()->Name, byteValue,
byteValue.GetType()->Name);
}
catch (OverflowException^ e) {
Console::WriteLine("OverflowException: Cannot convert {0}",
value);
}
}
}
// The example displays the following output:
// 78 (Decimal) --> 78 (SByte)
// 78.000 (Decimal) --> 78 (SByte)
// 78.999 (Decimal) --> 78 (SByte)
// OverflowException: Cannot convert 255.999
// OverflowException: Cannot convert 256
// 127.999 (Decimal) --> 127 (SByte)
// OverflowException: Cannot convert 128
// -0.999 (Decimal) --> 0 (SByte)
// -1 (Decimal) --> -1 (SByte)
// -128.999 (Decimal) --> -128 (SByte)
// OverflowException: Cannot convert -129
using System;
class Example
{
public static void Main()
{
// Define an array of decimal values.
decimal[] values = { 78m, new Decimal(78000, 0, 0, false, 3),
78.999m, 255.999m, 256m, 127.999m,
128m, -0.999m, -1m, -128.999m, -129m };
foreach (var value in values) {
try {
SByte byteValue = (SByte) value;
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, byteValue,
byteValue.GetType().Name);
}
catch (OverflowException) {
Console.WriteLine("OverflowException: Cannot convert {0}",
value);
}
}
}
}
// The example displays the following output:
// 78 (Decimal) --> 78 (SByte)
// 78.000 (Decimal) --> 78 (SByte)
// 78.999 (Decimal) --> 78 (SByte)
// OverflowException: Cannot convert 255.999
// OverflowException: Cannot convert 256
// 127.999 (Decimal) --> 127 (SByte)
// OverflowException: Cannot convert 128
// -0.999 (Decimal) --> 0 (SByte)
// -1 (Decimal) --> -1 (SByte)
// -128.999 (Decimal) --> -128 (SByte)
// OverflowException: Cannot convert -129
Option Strict On
Module Example
Public Sub Main()
' Define an array of decimal values.
Dim values() As Decimal = { 78d, New Decimal(78000, 0, 0, False, 3),
78.999d, 255.999d, 256d, 127.999d,
128d, -0.999d, -1d, -128.999d,
-129d }
For Each value In values
Try
Dim byteValue As SByte = CSByte(value)
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, byteValue,
byteValue.GetType().Name)
Catch e As OverflowException
Console.WriteLine("OverflowException: Cannot convert {0}",
value)
End Try
Next
End Sub
End Module
' The example displays the following output:
' 78 (Decimal) --> 78 (SByte)
' 78.000 (Decimal) --> 78 (SByte)
' 78.999 (Decimal) --> 79 (SByte)
' OverflowException: Cannot convert 255.999
' OverflowException: Cannot convert 256
' OverflowException: Cannot convert 127.999
' OverflowException: Cannot convert 128
' -0.999 (Decimal) --> -1 (SByte)
' -1 (Decimal) --> -1 (SByte)
' OverflowException: Cannot convert -128.999
' OverflowException: Cannot convert -129
注解
此运算符支持将显式转换 Decimal 为 SByte 。This operator supports the explicit conversion of a Decimal to a SByte. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Byte SByte 使用 c # 和 Visual Basic 将值显式转换为和值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a Byte and an SByte value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToSByte(Decimal) 方法或 Convert.ToSByte(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToSByte(Decimal) method or the Convert.ToSByte(Decimal) method.
另请参阅
适用于
Explicit(Decimal to UInt64)
重要
此 API 不符合 CLS。
public:
static explicit operator System::UInt64(System::Decimal value);[System.CLSCompliant(false)]
public static explicit operator ulong (decimal value);[<System.CLSCompliant(false)>]
static member op_Explicit : decimal -> uint64Public Shared Narrowing Operator CType (value As Decimal) As ULong参数
- value
- Decimal
要转换的值。The value to convert.
返回
64 位无符号整数，它表示转换后的 Decimal。A 64-bit unsigned integer that represents the converted Decimal.
- 属性
例外
示例
下面的示例 Decimal UInt64 使用 explicit Decimal to 转换运算符将数字转换为值 UInt64 。The following example converts Decimal numbers to UInt64 values by using the explicit Decimal to UInt64 conversion operator.
// Example of the explicit conversions from Decimal to __int64 and
// Decimal to unsigned __int64.
using namespace System;
#define formatter "{0,25}{1,22}{2,22}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int64( Decimal argument )
{
Object^ Int64Value;
Object^ UInt64Value;
// Convert the argument to an __int64 value.
try
{
Int64Value = (__int64)argument;
}
catch ( Exception^ ex )
{
Int64Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned __int64 value.
try
{
UInt64Value = (unsigned __int64)argument;
}
catch ( Exception^ ex )
{
UInt64Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int64Value, UInt64Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"__int64 \nand Decimal to unsigned __int64 generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "__int64", "unsigned __int64" );
Console::WriteLine( formatter, "----------------", "-------", "----------------" );
// Convert Decimal values and display the results.
DecimalToU_Int64( Decimal::Parse( "123" ) );
DecimalToU_Int64( Decimal(123000,0,0,false,3) );
DecimalToU_Int64( Decimal::Parse( "123.999" ) );
DecimalToU_Int64( Decimal::Parse( "18446744073709551615.999" ) );
DecimalToU_Int64( Decimal::Parse( "18446744073709551616" ) );
DecimalToU_Int64( Decimal::Parse( "9223372036854775807.999" ) );
DecimalToU_Int64( Decimal::Parse( "9223372036854775808" ) );
DecimalToU_Int64( Decimal::Parse( "-0.999" ) );
DecimalToU_Int64( Decimal::Parse( "-1" ) );
DecimalToU_Int64( Decimal::Parse( "-9223372036854775808.999" ) );
DecimalToU_Int64( Decimal::Parse( "-9223372036854775809" ) );
}
/*
This example of the explicit conversions from Decimal to __int64
and Decimal to unsigned __int64 generates the following output.
It displays several converted Decimal values.
Decimal argument __int64 unsigned __int64
---------------- ------- ----------------
123 123 123
123.000 123 123
123.999 123 123
18446744073709551615.999 OverflowException 18446744073709551615
18446744073709551616 OverflowException OverflowException
9223372036854775807.999 9223372036854775807 9223372036854775807
9223372036854775808 OverflowException 9223372036854775808
-0.999 0 0
-1 -1 OverflowException
-9223372036854775808.999 -9223372036854775808 OverflowException
-9223372036854775809 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to long and
// decimal to ulong.
using System;
class DecimalToU_Int64Demo
{
const string formatter = "{0,25}{1,22}{2,22}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int64( decimal argument )
{
object Int64Value;
object UInt64Value;
// Convert the argument to a long value.
try
{
Int64Value = (long)argument;
}
catch( Exception ex )
{
Int64Value = GetExceptionType( ex );
}
// Convert the argument to a ulong value.
try
{
UInt64Value = (ulong)argument;
}
catch( Exception ex )
{
UInt64Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int64Value, UInt64Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to long \nand decimal to ulong generates the following " +
"output. It displays \nseveral converted decimal " +
"values.\n" );
Console.WriteLine( formatter, "decimal argument",
"long/exception", "ulong/exception" );
Console.WriteLine( formatter, "----------------",
"--------------", "---------------" );
// Convert decimal values and display the results.
DecimalToU_Int64( 123M );
DecimalToU_Int64( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int64( 123.999M );
DecimalToU_Int64( 18446744073709551615.999M );
DecimalToU_Int64( 18446744073709551616M );
DecimalToU_Int64( 9223372036854775807.999M );
DecimalToU_Int64( 9223372036854775808M );
DecimalToU_Int64( - 0.999M );
DecimalToU_Int64( - 1M );
DecimalToU_Int64( - 9223372036854775808.999M );
DecimalToU_Int64( - 9223372036854775809M );
}
}
/*
This example of the explicit conversions from decimal to long
and decimal to ulong generates the following output. It displays
several converted decimal values.
decimal argument long/exception ulong/exception
---------------- -------------- ---------------
123 123 123
123.000 123 123
123.999 123 123
18446744073709551615.999 OverflowException 18446744073709551615
18446744073709551616 OverflowException OverflowException
9223372036854775807.999 9223372036854775807 9223372036854775807
9223372036854775808 OverflowException 9223372036854775808
-0.999 0 0
-1 -1 OverflowException
-9223372036854775808.999 -9223372036854775808 OverflowException
-9223372036854775809 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Long and
' Decimal to ULong.
Module DecimalToU_Int64Demo
Const formatter As String = "{0,25}{1,22}{2,22}"
' Convert the decimal argument catch exceptions that are thrown.
Public Sub DecimalToU_Int64(argument As Decimal)
Dim Int64Value As Object
Dim UInt64Value As Object
' Convert the argument to a long value.
Try
Int64Value = CLng(argument)
Catch ex As Exception
Int64Value = ex.GetType().Name
End Try
' Convert the argument to a ulong value.
Try
UInt64Value = CULng(argument)
Catch ex As Exception
UInt64Value = ex.GetType().Name
End Try
Console.WriteLine(formatter, argument, _
Int64Value, UInt64Value)
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal argument", _
"Long/Exception", "ULong/Exception" )
Console.WriteLine( formatter, "----------------", _
"--------------", "---------------" )
' Convert decimal values and display the results.
DecimalToU_Int64(123d)
DecimalToU_Int64(New Decimal(123000, 0, 0, False, 3))
DecimalToU_Int64(123.999d)
DecimalToU_Int64(18446744073709551615.999d)
DecimalToU_Int64(18446744073709551616d)
DecimalToU_Int64(9223372036854775807.999d)
DecimalToU_Int64(9223372036854775808d)
DecimalToU_Int64(-0.999d)
DecimalToU_Int64(-1d)
DecimalToU_Int64(-9223372036854775808.999d)
DecimalToU_Int64(-9223372036854775809d)
End Sub
End Module
' The example displays the following output to the console:
' Decimal argument Long/Exception ULong/Exception
' ---------------- -------------- ---------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 18446744073709551615.999 OverflowException OverflowException
' 18446744073709551616 OverflowException OverflowException
' 9223372036854775807.999 OverflowException 9223372036854775808
' 9223372036854775808 OverflowException 9223372036854775808
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -9223372036854775808.999 OverflowException OverflowException
' -9223372036854775809 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 UInt64 。This operator supports the explicit conversion of a Decimal to a UInt64. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal UInt64 使用 c # 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a UInt64 value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToUInt64(Decimal) 或 Convert.ToUInt64(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToUInt64(Decimal) or the Convert.ToUInt64(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Int32)
public:
static explicit operator int(System::Decimal value);public static explicit operator int (decimal value);static member op_Explicit : decimal -> intPublic Shared Narrowing Operator CType (value As Decimal) As Integer参数
- value
- Decimal
要转换的值。The value to convert.
返回
32 位有符号整数，它表示转换后的 Decimal。A 32-bit signed integer that represents the converted Decimal.
例外
示例
下面的示例 Decimal Int32 使用 explicit Decimal to 转换运算符将数字转换为值 Int32 。The following example converts Decimal numbers to Int32 values by using the explicit Decimal to Int32 conversion operator.
// Example of the explicit conversions from Decimal to int and
// Decimal to unsigned int.
using namespace System;
#define formatter "{0,17}{1,19}{2,19}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int32( Decimal argument )
{
Object^ Int32Value;
Object^ UInt32Value;
// Convert the argument to an int value.
try
{
Int32Value = (int)argument;
}
catch ( Exception^ ex )
{
Int32Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned int value.
try
{
UInt32Value = (unsigned int)argument;
}
catch ( Exception^ ex )
{
UInt32Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int32Value, UInt32Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"int \nand Decimal to unsigned int generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "int", "unsigned int" );
Console::WriteLine( formatter, "----------------", "---", "------------" );
// Convert Decimal values and display the results.
DecimalToU_Int32( Decimal::Parse( "123" ) );
DecimalToU_Int32( Decimal(123000,0,0,false,3) );
DecimalToU_Int32( Decimal::Parse( "123.999" ) );
DecimalToU_Int32( Decimal::Parse( "4294967295.999" ) );
DecimalToU_Int32( Decimal::Parse( "4294967296" ) );
DecimalToU_Int32( Decimal::Parse( "2147483647.999" ) );
DecimalToU_Int32( Decimal::Parse( "2147483648" ) );
DecimalToU_Int32( Decimal::Parse( "-0.999" ) );
DecimalToU_Int32( Decimal::Parse( "-1" ) );
DecimalToU_Int32( Decimal::Parse( "-2147483648.999" ) );
DecimalToU_Int32( Decimal::Parse( "-2147483649" ) );
}
/*
This example of the explicit conversions from Decimal to int
and Decimal to unsigned int generates the following output.
It displays several converted Decimal values.
Decimal argument int unsigned int
---------------- --- ------------
123 123 123
123.000 123 123
123.999 123 123
4294967295.999 OverflowException 4294967295
4294967296 OverflowException OverflowException
2147483647.999 2147483647 2147483647
2147483648 OverflowException 2147483648
-0.999 0 0
-1 -1 OverflowException
-2147483648.999 -2147483648 OverflowException
-2147483649 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to int and
// decimal to uint.
using System;
class DecimalToU_Int32Demo
{
const string formatter = "{0,17}{1,19}{2,19}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int32( decimal argument )
{
object Int32Value;
object UInt32Value;
// Convert the argument to an int value.
try
{
Int32Value = (int)argument;
}
catch( Exception ex )
{
Int32Value = GetExceptionType( ex );
}
// Convert the argument to a uint value.
try
{
UInt32Value = (uint)argument;
}
catch( Exception ex )
{
UInt32Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int32Value, UInt32Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to int \nand decimal to uint generates the following " +
"output. It displays \nseveral converted decimal " +
"values.\n" );
Console.WriteLine( formatter, "decimal argument",
"int/exception", "uint/exception" );
Console.WriteLine( formatter, "----------------",
"-------------", "--------------" );
// Convert decimal values and display the results.
DecimalToU_Int32( 123M );
DecimalToU_Int32( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int32( 123.999M );
DecimalToU_Int32( 4294967295.999M );
DecimalToU_Int32( 4294967296M );
DecimalToU_Int32( 2147483647.999M );
DecimalToU_Int32( 2147483648M );
DecimalToU_Int32( - 0.999M );
DecimalToU_Int32( - 1M );
DecimalToU_Int32( - 2147483648.999M );
DecimalToU_Int32( - 2147483649M );
}
}
/*
This example of the explicit conversions from decimal to int
and decimal to uint generates the following output. It displays
several converted decimal values.
decimal argument int/exception uint/exception
---------------- ------------- --------------
123 123 123
123.000 123 123
123.999 123 123
4294967295.999 OverflowException 4294967295
4294967296 OverflowException OverflowException
2147483647.999 2147483647 2147483647
2147483648 OverflowException 2147483648
-0.999 0 0
-1 -1 OverflowException
-2147483648.999 -2147483648 OverflowException
-2147483649 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Integer and
' Decimal to UInteger.
Module DecimalToU_Int32Demo
Const formatter As String = "{0,17}{1,19}{2,19}"
' Convert the decimal argument catch exceptions that are thrown.
Public Sub DecimalToU_Int32(argument As Decimal)
Dim Int32Value As Object
Dim UInt32Value As Object
' Convert the argument to an int value.
Try
Int32Value = CInt(argument)
Catch ex As Exception
Int32Value = ex.GetType().Name
End Try
' Convert the argument to a uint value.
Try
UInt32Value = CUInt(argument)
Catch ex As Exception
UInt32Value = ex.GetType().Name
End Try
Console.WriteLine(formatter, argument, _
Int32Value, UInt32Value)
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal Argument", _
"Integer/Exception", "UInteger/Exception" )
Console.WriteLine( formatter, "----------------", _
"-------------", "--------------" )
' Convert decimal values and display the results.
DecimalToU_Int32( 123d)
DecimalToU_Int32(New Decimal(123000, 0, 0, False, 3))
DecimalToU_Int32(123.999d)
DecimalToU_Int32(4294967295.999d)
DecimalToU_Int32(4294967296d)
DecimalToU_Int32(2147483647.999d)
DecimalToU_Int32(2147483648d)
DecimalToU_Int32(-0.999d)
DecimalToU_Int32(-1d)
DecimalToU_Int32(-2147483648.999d)
DecimalToU_Int32(-2147483649d)
End Sub
End Module
' The example displays the following output to the console:
' Decimal Argument Integer/Exception UInteger/Exception
' ---------------- ------------- --------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 4294967295.999 OverflowException OverflowException
' 4294967296 OverflowException OverflowException
' 2147483647.999 OverflowException 2147483648
' 2147483648 OverflowException 2147483648
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -2147483648.999 OverflowException OverflowException
' -2147483649 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 Int32 。This operator supports the explicit conversion of a Decimal to an Int32. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Int32 使用 c #、c + + 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to an Int32 value by using C#, C++, and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToInt32(Decimal) 或 Convert.ToInt32(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToInt32(Decimal) or the Convert.ToInt32(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Int16)
public:
static explicit operator short(System::Decimal value);public static explicit operator short (decimal value);static member op_Explicit : decimal -> int16Public Shared Narrowing Operator CType (value As Decimal) As Short参数
- value
- Decimal
要转换的值。The value to convert.
返回
16 位有符号整数，它表示转换后的 Decimal。A 16-bit signed integer that represents the converted Decimal.
例外
示例
下面的示例 Decimal Int16 使用 explicit Decimal to 转换运算符将数字转换为值 Int16 。The following example converts Decimal numbers to Int16 values by using the explicit Decimal to Int16 conversion operator.
// Example of the explicit conversions from Decimal to short and
// Decimal to unsigned short.
using namespace System;
#define formatter "{0,16}{1,19}{2,19}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int16( Decimal argument )
{
Object^ Int16Value;
Object^ UInt16Value;
// Convert the argument to a short value.
try
{
Int16Value = (short)argument;
}
catch ( Exception^ ex )
{
Int16Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned short value.
try
{
UInt16Value = (unsigned short)argument;
}
catch ( Exception^ ex )
{
UInt16Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int16Value, UInt16Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"short \nand Decimal to unsigned short generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "short", "unsigned short" );
Console::WriteLine( formatter, "----------------", "-----", "--------------" );
// Convert Decimal values and display the results.
DecimalToU_Int16( Decimal::Parse( "123" ) );
DecimalToU_Int16( Decimal(123000,0,0,false,3) );
DecimalToU_Int16( Decimal::Parse( "123.999" ) );
DecimalToU_Int16( Decimal::Parse( "65535.999" ) );
DecimalToU_Int16( Decimal::Parse( "65536" ) );
DecimalToU_Int16( Decimal::Parse( "32767.999" ) );
DecimalToU_Int16( Decimal::Parse( "32768" ) );
DecimalToU_Int16( Decimal::Parse( "-0.999" ) );
DecimalToU_Int16( Decimal::Parse( "-1" ) );
DecimalToU_Int16( Decimal::Parse( "-32768.999" ) );
DecimalToU_Int16( Decimal::Parse( "-32769" ) );
}
/*
This example of the explicit conversions from Decimal to short
and Decimal to unsigned short generates the following output.
It displays several converted Decimal values.
Decimal argument short unsigned short
---------------- ----- --------------
123 123 123
123.000 123 123
123.999 123 123
65535.999 OverflowException 65535
65536 OverflowException OverflowException
32767.999 32767 32767
32768 OverflowException 32768
-0.999 0 0
-1 -1 OverflowException
-32768.999 -32768 OverflowException
-32769 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to short and
// decimal to ushort.
using System;
class DecimalToU_Int16Demo
{
const string formatter = "{0,16}{1,19}{2,19}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int16( decimal argument )
{
object Int16Value;
object UInt16Value;
// Convert the argument to a short value.
try
{
Int16Value = (short)argument;
}
catch( Exception ex )
{
Int16Value = GetExceptionType( ex );
}
// Convert the argument to a ushort value.
try
{
UInt16Value = (ushort)argument;
}
catch( Exception ex )
{
UInt16Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int16Value, UInt16Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to short \nand decimal to ushort generates the " +
"following output. It displays \nseveral converted " +
"decimal values.\n" );
Console.WriteLine( formatter, "decimal argument",
"short/exception", "ushort/exception" );
Console.WriteLine( formatter, "----------------",
"---------------", "----------------" );
// Convert decimal values and display the results.
DecimalToU_Int16( 123M );
DecimalToU_Int16( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int16( 123.999M );
DecimalToU_Int16( 65535.999M );
DecimalToU_Int16( 65536M );
DecimalToU_Int16( 32767.999M );
DecimalToU_Int16( 32768M );
DecimalToU_Int16( - 0.999M );
DecimalToU_Int16( - 1M );
DecimalToU_Int16( - 32768.999M );
DecimalToU_Int16( - 32769M );
}
}
/*
This example of the explicit conversions from decimal to short
and decimal to ushort generates the following output. It displays
several converted decimal values.
decimal argument short/exception ushort/exception
---------------- --------------- ----------------
123 123 123
123.000 123 123
123.999 123 123
65535.999 OverflowException 65535
65536 OverflowException OverflowException
32767.999 32767 32767
32768 OverflowException 32768
-0.999 0 0
-1 -1 OverflowException
-32768.999 -32768 OverflowException
-32769 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Short and
' Decimal to UShort.
Module DecimalToU_Int16Demo
Const formatter As String = "{0,16}{1,19}{2,19}"
' Convert the decimal argument and catch exceptions that are thrown.
Public Sub DecimalToU_Int16(argument As Decimal)
Dim Int16Value As Object
Dim UInt16Value As Object
' Convert the argument to a Short value.
Try
Int16Value = CShort(argument)
Catch ex As Exception
Int16Value = ex.GetType().Name
End Try
' Convert the argument to a UShort value.
Try
UInt16Value = CUShort(argument)
Catch ex As Exception
UInt16Value = ex.GetType().Name
End Try
Console.WriteLine( formatter, argument, _
Int16Value, UInt16Value )
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal argument", _
"Short/Exception", "UShort/Exception" )
Console.WriteLine( formatter, "----------------", _
"---------------", "----------------" )
' Convert decimal values and display the results.
DecimalToU_Int16(123d)
DecimalToU_Int16(New Decimal( 123000, 0, 0, False, 3 ))
DecimalToU_Int16(123.999d)
DecimalToU_Int16(65535.999d)
DecimalToU_Int16(65536d)
DecimalToU_Int16(32767.999d)
DecimalToU_Int16(32768d)
DecimalToU_Int16(-0.999d)
DecimalToU_Int16(-1d)
DecimalToU_Int16(-32768.999d)
DecimalToU_Int16(-32769d)
End Sub
End Module
' This example displays the following output to the console:
' Decimal argument Short/Exception UShort/Exception
' ---------------- --------------- ----------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 65535.999 OverflowException OverflowException
' 65536 OverflowException OverflowException
' 32767.999 OverflowException 32768
' 32768 OverflowException 32768
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -32768.999 OverflowException OverflowException
' -32769 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 Int16 。This operator supports the explicit conversion of a Decimal to an Int16. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Int16 使用 c #、Visual Basic 和 c + + 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to an Int16 value by using C#, Visual Basic, and C++. 若要执行独立于语言的转换，可以调用 Decimal.ToInt16(Decimal) 或 Convert.ToInt16(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToInt16(Decimal) or the Convert.ToInt16(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Double)
public:
static explicit operator double(System::Decimal value);public static explicit operator double (decimal value);static member op_Explicit : decimal -> doublePublic Shared Narrowing Operator CType (value As Decimal) As Double参数
- value
- Decimal
要转换的值。The value to convert.
返回
双精度浮点数，它表示转换后的 Decimal。A double-precision floating-point number that represents the converted Decimal.
示例
下面的示例 Decimal Double 使用 explicit Decimal to 转换运算符将数字转换为值 Double 。The following example converts Decimal numbers to Double values by using the explicit Decimal to Double conversion operator.
using namespace System;
void main()
{
// Define an array of Decimal values.
array<Decimal>^ values = { Decimal::Parse("0.0000000000000000000000000001"),
Decimal::Parse("0.0000000000123456789123456789"),
Decimal::Parse("123"),
Decimal(123000000, 0, 0, false, 6),
Decimal::Parse("123456789.123456789"),
Decimal::Parse("123456789123456789123456789"),
Decimal::MinValue, Decimal::MaxValue };
// Convert each value to a double.
for each (Decimal value in values) {
double dblValue = (double) value;
Console::WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType()->Name, dblValue,
dblValue.GetType()->Name);
}
}
// The example displays the following output:
// 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Double)
// 0.0000000000123456789123456789 (Decimal) --> 1.23456789123457E-11 (Double)
// 123 (Decimal) --> 123 (Double)
// 123.000000 (Decimal) --> 123 (Double)
// 123456789.123456789 (Decimal) --> 123456789.123457 (Double)
// 123456789123456789123456789 (Decimal) --> 1.23456789123457E+26 (Double)
// -79228162514264337593543950335 (Decimal) --> -7.92281625142643E+28 (Double)
// 79228162514264337593543950335 (Decimal) --> 7.92281625142643E+28 (Double)
using System;
class Example
{
public static void Main( )
{
// Define an array of decimal values.
decimal[] values = { 0.0000000000000000000000000001M,
0.0000000000123456789123456789M,
123M, new decimal(123000000, 0, 0, false, 6),
123456789.123456789M,
123456789123456789123456789M,
decimal.MinValue, decimal.MaxValue };
// Convert each value to a double.
foreach (var value in values) {
double dblValue = (double) value;
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, dblValue,
dblValue.GetType().Name);
}
}
}
// The example displays the following output:
// 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Double)
// 0.0000000000123456789123456789 (Decimal) --> 1.23456789123457E-11 (Double)
// 123 (Decimal) --> 123 (Double)
// 123.000000 (Decimal) --> 123 (Double)
// 123456789.123456789 (Decimal) --> 123456789.123457 (Double)
// 123456789123456789123456789 (Decimal) --> 1.23456789123457E+26 (Double)
// -79228162514264337593543950335 (Decimal) --> -7.92281625142643E+28 (Double)
// 79228162514264337593543950335 (Decimal) --> 7.92281625142643E+28 (Double)
Module Example
Public Sub Main( )
' Define an array of Decimal values.
Dim values() As Decimal= { 0.0000000000000000000000000001d,
0.0000000000123456789123456789d,
123d,
New Decimal(123000000, 0, 0, False, 6),
123456789.123456789d,
123456789123456789123456789d,
Decimal.MinValue, Decimal.MaxValue }
For Each value In values
Dim dblValue As Double = CDbl(value)
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, dblValue,
dblValue.GetType().Name)
Next
End Sub
End Module
' The example displays the following output:
' 0.0000000000000000000000000001 (Decimal) --> 1E-28 (Double)
' 0.0000000000123456789123456789 (Decimal) --> 1.23456789123457E-11 (Double)
' 123 (Decimal) --> 123 (Double)
' 123.000000 (Decimal) --> 123 (Double)
' 123456789.123456789 (Decimal) --> 123456789.123457 (Double)
' 123456789123456789123456789 (Decimal) --> 1.23456789123457E+26 (Double)
' -79228162514264337593543950335 (Decimal) --> -7.92281625142643E+28 (Double)
' 79228162514264337593543950335 (Decimal) --> 7.92281625142643E+28 (Double)
注解
此操作可能会导致精度损失，因为双精度浮点数的有效位数少于 Decimal 。This operation can result in a loss of precision, because a double-precision floating-point number has fewer significant digits than a Decimal.
此运算符支持将显式转换 Decimal 为 Double 。This operator supports the explicit conversion of a Decimal to a Double. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Double 使用 c #、c + + 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a Double value by using C#, C++, and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToDouble(Decimal) 或 Convert.ToDouble(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToDouble(Decimal) or the Convert.ToDouble(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Char)
public:
static explicit operator char(System::Decimal value);public static explicit operator char (decimal value);static member op_Explicit : decimal -> charPublic Shared Narrowing Operator CType (value As Decimal) As Char参数
- value
- Decimal
要转换的值。The value to convert.
返回
表示转换后的 Decimal 的 Unicode 字符。A Unicode character that represents the converted Decimal.
例外
示例
下面的示例 Decimal Char 使用 explicit Decimal to 转换运算符) 将数字转换为 (Unicode 字符的值 Char 。The following example converts Decimal numbers to Char values (Unicode characters) by using the explicit Decimal to Char conversion operator.
using System;
class Example
{
public static void Main( )
{
// Define an array of decimal values.
decimal[] values = { 3.33m, 55.5m, 77.7m, 123m, 123.999m, 170m,
188.88m, 222m, 244m, 8217m, 8250m, 65536m,
-1m };
// Convert each value to a Char.
foreach (decimal value in values) {
try {
char charValue = (char) value;
Console.WriteLine("{0} --> {1} ({2:X4})", value,
charValue, (ushort) charValue);
}
catch (OverflowException) {
Console.WriteLine("OverflowException: Cannot convert {0}",
value);
}
}
}
}
// The example displays the following output:
// 3.33 --> ? (0003)
// 55.5 --> 7 (0037)
// 77.7 --> M (004D)
// 123 --> { (007B)
// 123.999 --> { (007B)
// 170 --> ª (00AA)
// 188.88 --> ¼ (00BC)
// 222 --> _ (00DE)
// 244 --> ô (00F4)
// 8217 --> ' (2019)
// 8250 --> > (203A)
// OverflowException: Cannot convert 65536
// OverflowException: Cannot convert -1
' Visual Basic does not support explicit Decimal-to-Char
' conversion using either CType or CChar.
注解
此运算符支持将显式转换 Decimal 为 Char 。This operator supports the explicit conversion of a Decimal to a Char. 此类显式转换的语法是依赖于语言的，并且各语言编译器可以提供不同的实现并返回不同的结果，也可能根本不支持转换。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results, or might not support the conversion at all. 例如，Visual Basic 和 c + + 编译器不支持显式 Decimal Char 转换。For example, the Visual Basic and C++ compilers do not support an explicit Decimal to a Char conversion.
另请参阅
适用于
Explicit(Decimal to Byte)
public:
static explicit operator System::Byte(System::Decimal value);public static explicit operator byte (decimal value);static member op_Explicit : decimal -> bytePublic Shared Narrowing Operator CType (value As Decimal) As Byte参数
- value
- Decimal
要转换的值。The value to convert.
返回
8 位无符号整数，它表示转换后的 Decimal。An 8-bit unsigned integer that represents the converted Decimal.
例外
示例
下面的示例 Decimal Byte 使用 explicit Decimal to 转换运算符将数字转换为值 Byte 。The following example converts Decimal numbers to Byte values by using the explicit Decimal to Byte conversion operator.
using namespace System;
void main()
{
// Define an array of decimal values.
array<Decimal>^ values = { Decimal::Parse("78"),
Decimal(78000,0,0,false,3),
Decimal::Parse("78.999"),
Decimal::Parse("255.999"),
Decimal::Parse("256"),
Decimal::Parse("127.999"),
Decimal::Parse("128"),
Decimal::Parse("-0.999"),
Decimal::Parse("-1"),
Decimal::Parse("-128.999"),
Decimal::Parse("-129") };
for each (Decimal value in values) {
try {
Byte byteValue = (Byte) value;
Console::WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType()->Name, byteValue,
byteValue.GetType()->Name);
}
catch (OverflowException^ e) {
Console::WriteLine("OverflowException: Cannot convert {0}",
value);
}
}
}
// The example displays the following output:
// 78 (Decimal) --> 78 (Byte)
// 78.000 (Decimal) --> 78 (Byte)
// 78.999 (Decimal) --> 78 (Byte)
// 255.999 (Decimal) --> 255 (Byte)
// OverflowException: Cannot convert 256
// 127.999 (Decimal) --> 127 (Byte)
// 128 (Decimal) --> 128 (Byte)
// -0.999 (Decimal) --> 0 (Byte)
// OverflowException: Cannot convert -1
// OverflowException: Cannot convert -128.999
// OverflowException: Cannot convert -129
using System;
class Example
{
public static void Main()
{
// Define an array of decimal values.
decimal[] values = { 78m, new Decimal(78000, 0, 0, false, 3),
78.999m, 255.999m, 256m, 127.999m,
128m, -0.999m, -1m, -128.999m, -129m };
foreach (var value in values) {
try {
Byte byteValue = (Byte) value;
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, byteValue,
byteValue.GetType().Name);
}
catch (OverflowException) {
Console.WriteLine("OverflowException: Cannot convert {0}",
value);
}
}
}
}
// The example displays the following output:
// 78 (Decimal) --> 78 (Byte)
// 78.000 (Decimal) --> 78 (Byte)
// 78.999 (Decimal) --> 78 (Byte)
// 255.999 (Decimal) --> 255 (Byte)
// OverflowException: Cannot convert 256
// 127.999 (Decimal) --> 127 (Byte)
// 128 (Decimal) --> 128 (Byte)
// -0.999 (Decimal) --> 0 (Byte)
// OverflowException: Cannot convert -1
// OverflowException: Cannot convert -128.999
// OverflowException: Cannot convert -129
Option Strict On
Module Example
Public Sub Main()
' Define an array of decimal values.
Dim values() As Decimal = { 78d, New Decimal(78000, 0, 0, False, 3),
78.999d, 255.999d, 256d, 127.999d,
128d, -0.999d, -1d, -128.999d,
-129d }
For Each value In values
Try
Dim byteValue As Byte = CByte(value)
Console.WriteLine("{0} ({1}) --> {2} ({3})", value,
value.GetType().Name, byteValue,
byteValue.GetType().Name)
Catch e As OverflowException
Console.WriteLine("OverflowException: Cannot convert {0}",
value)
End Try
Next
End Sub
End Module
' The example displays the following output:
' 78 (Decimal) --> 78 (Byte)
' 78.000 (Decimal) --> 78 (Byte)
' 78.999 (Decimal) --> 79 (Byte)
' OverflowException: Cannot convert 255.999
' OverflowException: Cannot convert 256
' 127.999 (Decimal) --> 128 (Byte)
' 128 (Decimal) --> 128 (Byte)
' OverflowException: Cannot convert -0.999
' OverflowException: Cannot convert -1
' OverflowException: Cannot convert -128.999
' OverflowException: Cannot convert -129
注解
此运算符支持将显式转换 Decimal 为 Byte 。This operator supports the explicit conversion of a Decimal to a Byte. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Byte 使用 c #、c + + 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to a Byte value by using C#, C++, and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToByte(Decimal) 或 Convert.ToByte(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToByte(Decimal) or the Convert.ToByte(Decimal) method.
另请参阅
适用于
Explicit(Decimal to Int64)
public:
static explicit operator long(System::Decimal value);public static explicit operator long (decimal value);static member op_Explicit : decimal -> int64Public Shared Narrowing Operator CType (value As Decimal) As Long参数
- value
- Decimal
要转换的值。The value to convert.
返回
64 位有符号整数，它表示转换后的 Decimal。A 64-bit signed integer that represents the converted Decimal.
例外
示例
下面的示例 Decimal Int64 使用 explicit Decimal to 转换运算符将数字转换为值 Int64 。The following example converts Decimal numbers to Int64 values by using the explicit Decimal to Int64 conversion operator.
// Example of the explicit conversions from Decimal to __int64 and
// Decimal to unsigned __int64.
using namespace System;
#define formatter "{0,25}{1,22}{2,22}"
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Convert the Decimal argument; catch exceptions that are thrown.
void DecimalToU_Int64( Decimal argument )
{
Object^ Int64Value;
Object^ UInt64Value;
// Convert the argument to an __int64 value.
try
{
Int64Value = (__int64)argument;
}
catch ( Exception^ ex )
{
Int64Value = GetExceptionType( ex );
}
// Convert the argument to an unsigned __int64 value.
try
{
UInt64Value = (unsigned __int64)argument;
}
catch ( Exception^ ex )
{
UInt64Value = GetExceptionType( ex );
}
Console::WriteLine( formatter, argument, Int64Value, UInt64Value );
}
int main()
{
Console::WriteLine( "This example of the explicit conversions from Decimal to "
"__int64 \nand Decimal to unsigned __int64 generates the "
"following output. \nIt displays several converted Decimal "
"values.\n" );
Console::WriteLine( formatter, "Decimal argument", "__int64", "unsigned __int64" );
Console::WriteLine( formatter, "----------------", "-------", "----------------" );
// Convert Decimal values and display the results.
DecimalToU_Int64( Decimal::Parse( "123" ) );
DecimalToU_Int64( Decimal(123000,0,0,false,3) );
DecimalToU_Int64( Decimal::Parse( "123.999" ) );
DecimalToU_Int64( Decimal::Parse( "18446744073709551615.999" ) );
DecimalToU_Int64( Decimal::Parse( "18446744073709551616" ) );
DecimalToU_Int64( Decimal::Parse( "9223372036854775807.999" ) );
DecimalToU_Int64( Decimal::Parse( "9223372036854775808" ) );
DecimalToU_Int64( Decimal::Parse( "-0.999" ) );
DecimalToU_Int64( Decimal::Parse( "-1" ) );
DecimalToU_Int64( Decimal::Parse( "-9223372036854775808.999" ) );
DecimalToU_Int64( Decimal::Parse( "-9223372036854775809" ) );
}
/*
This example of the explicit conversions from Decimal to __int64
and Decimal to unsigned __int64 generates the following output.
It displays several converted Decimal values.
Decimal argument __int64 unsigned __int64
---------------- ------- ----------------
123 123 123
123.000 123 123
123.999 123 123
18446744073709551615.999 OverflowException 18446744073709551615
18446744073709551616 OverflowException OverflowException
9223372036854775807.999 9223372036854775807 9223372036854775807
9223372036854775808 OverflowException 9223372036854775808
-0.999 0 0
-1 -1 OverflowException
-9223372036854775808.999 -9223372036854775808 OverflowException
-9223372036854775809 OverflowException OverflowException
*/
// Example of the explicit conversions from decimal to long and
// decimal to ulong.
using System;
class DecimalToU_Int64Demo
{
const string formatter = "{0,25}{1,22}{2,22}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int64( decimal argument )
{
object Int64Value;
object UInt64Value;
// Convert the argument to a long value.
try
{
Int64Value = (long)argument;
}
catch( Exception ex )
{
Int64Value = GetExceptionType( ex );
}
// Convert the argument to a ulong value.
try
{
UInt64Value = (ulong)argument;
}
catch( Exception ex )
{
UInt64Value = GetExceptionType( ex );
}
Console.WriteLine( formatter, argument,
Int64Value, UInt64Value );
}
public static void Main( )
{
Console.WriteLine(
"This example of the explicit conversions from decimal " +
"to long \nand decimal to ulong generates the following " +
"output. It displays \nseveral converted decimal " +
"values.\n" );
Console.WriteLine( formatter, "decimal argument",
"long/exception", "ulong/exception" );
Console.WriteLine( formatter, "----------------",
"--------------", "---------------" );
// Convert decimal values and display the results.
DecimalToU_Int64( 123M );
DecimalToU_Int64( new decimal( 123000, 0, 0, false, 3 ) );
DecimalToU_Int64( 123.999M );
DecimalToU_Int64( 18446744073709551615.999M );
DecimalToU_Int64( 18446744073709551616M );
DecimalToU_Int64( 9223372036854775807.999M );
DecimalToU_Int64( 9223372036854775808M );
DecimalToU_Int64( - 0.999M );
DecimalToU_Int64( - 1M );
DecimalToU_Int64( - 9223372036854775808.999M );
DecimalToU_Int64( - 9223372036854775809M );
}
}
/*
This example of the explicit conversions from decimal to long
and decimal to ulong generates the following output. It displays
several converted decimal values.
decimal argument long/exception ulong/exception
---------------- -------------- ---------------
123 123 123
123.000 123 123
123.999 123 123
18446744073709551615.999 OverflowException 18446744073709551615
18446744073709551616 OverflowException OverflowException
9223372036854775807.999 9223372036854775807 9223372036854775807
9223372036854775808 OverflowException 9223372036854775808
-0.999 0 0
-1 -1 OverflowException
-9223372036854775808.999 -9223372036854775808 OverflowException
-9223372036854775809 OverflowException OverflowException
*/
' Example of the explicit conversions from Decimal to Long and
' Decimal to ULong.
Module DecimalToU_Int64Demo
Const formatter As String = "{0,25}{1,22}{2,22}"
' Convert the decimal argument catch exceptions that are thrown.
Public Sub DecimalToU_Int64(argument As Decimal)
Dim Int64Value As Object
Dim UInt64Value As Object
' Convert the argument to a long value.
Try
Int64Value = CLng(argument)
Catch ex As Exception
Int64Value = ex.GetType().Name
End Try
' Convert the argument to a ulong value.
Try
UInt64Value = CULng(argument)
Catch ex As Exception
UInt64Value = ex.GetType().Name
End Try
Console.WriteLine(formatter, argument, _
Int64Value, UInt64Value)
End Sub
Public Sub Main( )
Console.WriteLine( formatter, "Decimal argument", _
"Long/Exception", "ULong/Exception" )
Console.WriteLine( formatter, "----------------", _
"--------------", "---------------" )
' Convert decimal values and display the results.
DecimalToU_Int64(123d)
DecimalToU_Int64(New Decimal(123000, 0, 0, False, 3))
DecimalToU_Int64(123.999d)
DecimalToU_Int64(18446744073709551615.999d)
DecimalToU_Int64(18446744073709551616d)
DecimalToU_Int64(9223372036854775807.999d)
DecimalToU_Int64(9223372036854775808d)
DecimalToU_Int64(-0.999d)
DecimalToU_Int64(-1d)
DecimalToU_Int64(-9223372036854775808.999d)
DecimalToU_Int64(-9223372036854775809d)
End Sub
End Module
' The example displays the following output to the console:
' Decimal argument Long/Exception ULong/Exception
' ---------------- -------------- ---------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 18446744073709551615.999 OverflowException OverflowException
' 18446744073709551616 OverflowException OverflowException
' 9223372036854775807.999 OverflowException 9223372036854775808
' 9223372036854775808 OverflowException 9223372036854775808
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -9223372036854775808.999 OverflowException OverflowException
' -9223372036854775809 OverflowException OverflowException
注解
此运算符支持将显式转换 Decimal 为 Int64 。This operator supports the explicit conversion of a Decimal to an Int64. 此类显式转换的语法依赖于语言，而各个语言编译器可提供不同的实现并返回不同的结果。The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. 当你 Decimal Int64 使用 c # 和 Visual Basic 将值显式转换为值时，此示例演示了不同的返回值。The example illustrates the different return values when you explicitly convert a Decimal value to an Int64 value by using C# and Visual Basic. 若要执行独立于语言的转换，可以调用 Decimal.ToInt64(Decimal) 或 Convert.ToInt64(Decimal) 方法。To perform a conversion that is independent of language, you can call the Decimal.ToInt64(Decimal) or the Convert.ToInt64(Decimal) method.