Decimal Explicit Conversion (Double to Decimal)

 

Defines an explicit conversion of a double-precision floating-point number to a Decimal.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

public static explicit operator decimal (
	double value
)

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.Decimal

The converted double-precision floating point number.

Exception Condition
OverflowException

value is less than Decimal.MinValue or greater than Decimal.MaxValue.

-or-

value is Double.NaN, Double.PositiveInfinity, or Double.NegativeInfinity.

The following example converts Double values to Decimal numbers by using the Double to Decimal conversion. This conversion requires the op_Explicit operator in Visual Basic.

// 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
*/

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Return to top
Show: