This documentation is archived and is not being maintained.

Convert.ToDouble Method (Boolean)

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

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

public static double ToDouble (
	bool value
)
public static double ToDouble (
	boolean value
)
public static function ToDouble (
	value : boolean
) : double
Not applicable.

Parameters

value

A Boolean value.

Return Value

The number 1 if value is true; otherwise, 0.

The following code sample illustrates the conversion of a Boolean value to a Double one, using ToDouble.

public void ConvertDoubleBool(double doubleVal) {
    bool    boolVal;
    // Double to bool conversion cannot overflow.
    boolVal = System.Convert.ToBoolean(doubleVal);
    System.Console.WriteLine("{0} as a Boolean is: {1}.",
        doubleVal, boolVal);

    // bool to double conversion cannot overflow.
    doubleVal = System.Convert.ToDouble(boolVal);
    System.Console.WriteLine("{0} as a double is: {1}.",
        boolVal, doubleVal);
}

public void ConvertDoubleBool(double doubleVal)
{
    boolean boolVal;

    // Double to bool conversion cannot overflow.
    boolVal = System.Convert.ToBoolean(doubleVal);
    System.Console.WriteLine("{0} as a Boolean is: {1}.", 
        System.Convert.ToString(doubleVal), 
        System.Convert.ToString(boolVal));

    // bool to double conversion cannot overflow.
    doubleVal = System.Convert.ToDouble(boolVal);
    System.Console.WriteLine("{0} as a double is: {1}.", 
        System.Convert.ToString(boolVal), 
        System.Convert.ToString(doubleVal));
} //ConvertDoubleBool

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
Show: