ToByte Method (Double)

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


Type: System.Double
A double-precision floating point number.

Return Value

Type: System.Byte
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.


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.
      byteVal = System.Convert.ToByte(doubleVal);
      outputBlock.Text += String.Format("{0} as a byte is: {1}.",
         doubleVal, byteVal) + "\n";
   catch (System.OverflowException)
      outputBlock.Text += String.Format(
         "Overflow in double-to-byte conversion.") + "\n";

   // Byte to double conversion cannot overflow.
   doubleVal = System.Convert.ToDouble(byteVal);
   outputBlock.Text += String.Format("{0} as a double is: {1}.",
      byteVal, doubleVal) + "\n";


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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