ToSByte Method (Object)

Convert.ToSByte Method (Object)

Converts the value of the specified object to an 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 Object _
) As SByte


Type: System.Object
An object that implements the IConvertible interface, or Nothing.

Return Value

Type: System.SByte
An 8-bit signed integer that is equivalent to value, or zero if value is Nothing.


value is not in an appropriate format.


value does not implement the IConvertible interface.


The conversion is not supported.


value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

The return value is the result of invoking the IConvertible.ToSByte method of the underlying type of value.

The following example attempts to convert each element in an object array to a signed byte.

Dim values() As Object = { True, -12, 163, 935, "x"c, "104", "103.0", "-1", _
                           "1.00e2", "One", 1.00e2}
Dim result As SByte
For Each value As Object In values
      result = Convert.ToSByte(value)
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
   Catch e As OverflowException
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
                        value.GetType().Name, value)
   Catch e As FormatException
      Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
                        value.GetType().Name, value)
   Catch e As InvalidCastException
      Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.", _
                        value.GetType().Name, value)

   End Try
' The example displays the following output:
'    Converted the Boolean value True to the SByte value 1.
'    Converted the Int32 value -12 to the SByte value -12.
'    The Int32 value 163 is outside the range of the SByte type.
'    The Int32 value 935 is outside the range of the SByte type.
'    Converted the Char value x to the SByte value 120.
'    Converted the String value 104 to the SByte value 104.
'    The String value 103.0 is not in a recognizable format.
'    Converted the String value -1 to the SByte value -1.
'    The String value 1.00e2 is not in a recognizable format.
'    The String value One is not in a recognizable format.
'    Converted the Double value 100 to the SByte value 100.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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