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Convert.ToDouble Method (Decimal)

Converts the value of the specified Decimal number to an equivalent double-precision floating point number.

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

public static double ToDouble (
	decimal value
)
public static double ToDouble (
	Decimal value
)
public static function ToDouble (
	value : decimal
) : double

Parameters

value

A Decimal number.

Return Value

A double-precision floating point number equivalent to the value of value.

The following code sample illustrates the conversion of a Decimal value to a Double one, using ToDouble. Note that if the Decimal passed is larger than MaxValue, an OverflowException will result.

public void ConvertDoubleDecimal(double doubleVal){
    
    decimal decimalVal;
    
    // Conversion from double to decimal cannot overflow.
    decimalVal = System.Convert.ToDecimal(doubleVal);
    System.Console.WriteLine ("{0} as a decimal is: {1}",
        doubleVal, decimalVal);
    
    // Decimal to double conversion can overflow.
    try {
        doubleVal = System.Convert.ToDouble(decimalVal);
        System.Console.WriteLine("{0} as a double is: {1}",
            decimalVal, doubleVal);
    } 
    catch (System.OverflowException) {
        System.Console.WriteLine(
            "Overflow in decimal-to-double conversion.");
    }

}

public void ConvertDoubleDecimal(double doubleVal)
{
    System.Decimal decimalVal;

    // Conversion from double to decimal cannot overflow.
    decimalVal = System.Convert.ToDecimal(doubleVal);
    System.Console.WriteLine("{0} as a decimal is: {1}", 
        System.Convert.ToString(doubleVal), 
        System.Convert.ToString(decimalVal));

    // Decimal to double conversion can overflow.
    try {        
        doubleVal = System.Convert.ToDouble(decimalVal);
        System.Console.WriteLine("{0} as a double is: {1}", 
            System.Convert.ToString(decimalVal), 
            System.Convert.ToString(doubleVal));
    }
    catch (System.OverflowException exp) {        
      System.Console.WriteLine("Overflow in decimal-to-double conversion.");
    }
} //ConvertDoubleDecimal

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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