Convert.ToByte Method (Double)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Converts the value of the specified double-precision floating point number to an equivalent 8-bit unsigned integer.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System.Double
A double-precision floating point number.
Return Value
Type: System.Bytevalue 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 | Condition |
|---|---|
| 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 Sub ConvertDoubleByte(ByVal doubleVal As Double) Dim byteVal As Byte = 0 ' Double to Byte conversion can overflow. Try byteVal = System.Convert.ToByte(doubleVal) outputBlock.Text &= String.Format("{0} as a Byte is: {1}.", _ doubleVal, byteVal) & vbCrLf Catch exception As System.OverflowException outputBlock.Text &= String.Format( _ "Overflow in Double-to-Byte conversion.") & vbCrLf End Try ' Byte to Double conversion cannot overflow. doubleVal = System.Convert.ToDouble(byteVal) outputBlock.Text &= String.Format("{0} as a Double is: {1}.", _ byteVal, doubleVal) & vbCrLf End Sub
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