Convert.ToByte Method (Double)

Converts the value of the specified double-precision floating point number to an equivalent 8-bit unsigned integer.

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

public static byte ToByte (
	double value
)
public static byte ToByte (
	double value
)
public static function ToByte (
	value : double
) : byte
Not applicable.

Parameters

value

A double-precision floating point number.

Return Value

value rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

Exception typeCondition

OverflowException

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

The following code sample illustrates the use of ToByte, converting a Double value to a Byte :

public void ConvertDoubleByte(double doubleVal) {
    byte    byteVal = 0;

    // Double to byte conversion can overflow.
    try {
        byteVal = System.Convert.ToByte(doubleVal);
        System.Console.WriteLine("{0} as a byte is: {1}.",
            doubleVal, byteVal);
    } 
    catch (System.OverflowException) {
        System.Console.WriteLine(
            "Overflow in double-to-byte conversion.");
    }

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

public void ConvertDoubleByte(double doubleVal)
{
    ubyte byteVal = 0;

    // Double to byte conversion can overflow.
    try {        
        byteVal = System.Convert.ToByte(doubleVal);
        System.Console.WriteLine("{0} as a byte is: {1}.", 
            System.Convert.ToString(doubleVal), 
            System.Convert.ToString(byteVal));
    }
    catch (System.OverflowException exp) {        
        System.Console.WriteLine("Overflow in double-to-byte conversion.");
    }

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

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
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