Create a negative hexadecimal value out of range of the Byte type. : Hex « Data Types « VB.Net

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2. Data Types
3. Hex

Create a negative hexadecimal value out of range of the Byte type.

 

Class Sample
   Public Shared Sub Main()

        Dim sourceNumber As SByte = SByte.MinValue
        Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
        Dim value As String = sourceNumber.ToString("X")
        Dim targetNumber As Byte
        Try
           targetNumber = Convert.ToByte(value, 16)
           If isSigned And ((targetNumber And &H80) <> 0) Then
              Throw New OverflowException()
           Else 
              Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
           End If    
        Catch e As OverflowException
           Console.WriteLine("Unable to convert '0x{0}' to an unsigned byte.", value)
        End Try 
    End Sub
End Class

   
  

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