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Decimal::ToDouble Method
Visual Studio 2010
Converts the value of the specified Decimal to the equivalent double-precision floating-point number.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- d
- Type: System::Decimal
The decimal number to convert.
This operation can produce round-off errors because a double-precision floating-point number has fewer significant digits than a Decimal.
The following code example converts Decimal numbers to Double values using ToDouble method.
// Example of the Decimal::ToSingle and Decimal::ToDouble methods. using namespace System; #define formatter "{0,30}{1,17}{2,23}" // Convert the Decimal argument; no exceptions are thrown. void DecimalToSgl_Dbl( Decimal argument ) { Object^ SingleValue; Object^ DoubleValue; // Convert the argument to a float value. SingleValue = Decimal::ToSingle( argument ); // Convert the argument to a double value. DoubleValue = Decimal::ToDouble( argument ); Console::WriteLine( formatter, argument, SingleValue, DoubleValue ); } int main() { Console::WriteLine( "This example of the \n" " Decimal::ToSingle( Decimal ) and \n" " Decimal::ToDouble( Decimal ) \nmethods " "generates the following output. It \ndisplays " "several converted Decimal values.\n" ); Console::WriteLine( formatter, "Decimal argument", "float", "double" ); Console::WriteLine( formatter, "----------------", "-----", "------" ); // Convert Decimal values and display the results. DecimalToSgl_Dbl( Decimal::Parse( "0.0000000000000000000000000001" ) ); DecimalToSgl_Dbl( Decimal::Parse( "0.0000000000123456789123456789" ) ); DecimalToSgl_Dbl( Decimal::Parse( "123" ) ); DecimalToSgl_Dbl( Decimal(123000000,0,0,false,6) ); DecimalToSgl_Dbl( Decimal::Parse( "123456789.123456789" ) ); DecimalToSgl_Dbl( Decimal::Parse( "123456789123456789123456789" ) ); DecimalToSgl_Dbl( Decimal::MinValue ); DecimalToSgl_Dbl( Decimal::MaxValue ); } /* This example of the Decimal::ToSingle( Decimal ) and Decimal::ToDouble( Decimal ) methods generates the following output. It displays several converted Decimal values. Decimal argument float double ---------------- ----- ------ 0.0000000000000000000000000001 1E-28 1E-28 0.0000000000123456789123456789 1.234568E-11 1.23456789123457E-11 123 123 123 123.000000 123 123 123456789.123456789 1.234568E+08 123456789.123457 123456789123456789123456789 1.234568E+26 1.23456789123457E+26 -79228162514264337593543950335 -7.922816E+28 -7.92281625142643E+28 79228162514264337593543950335 7.922816E+28 7.92281625142643E+28 */
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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