Convert.ToSByte Method (Double)

 

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

This API is not CLS-compliant.

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

<CLSCompliantAttribute(False)>
Public Shared Function ToSByte (
	value As Double
) As SByte

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.SByte

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 Condition
OverflowException

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

The following example attempts to convert each element in an array of Double values to a signed byte.

Dim numbers() As Double = { Double.MinValue, -129.5, -12.7, 0, 16, _
                            103.6, 255.0, 1.63509e17, Double.MaxValue}
Dim result As SByte

For Each number As Double In numbers
   Try
      result = Convert.ToSByte(number)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
                        number.GetType().Name, number)
   End Try
Next                                  
' The example displays the following output:
'    The Double value -1.79769313486232E+308 is outside the range of the SByte type.
'    The Double value -129.5 is outside the range of the SByte type.
'    Converted the Double value -12.7 to the SByte value -13.
'    Converted the Double value 0 to the SByte value 0.
'    Converted the Double value 16 to the SByte value 16.
'    Converted the Double value 103.6 to the SByte value 104.
'    The Double value 255 is outside the range of the SByte type.
'    The Double value 1.63509E+17 is outside the range of the SByte type.
'    The Double value 1.79769313486232E+308 is outside the range of the SByte type.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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