Here is a function that takes in a string of Hex and converts to byte array.
For example:
[code]Dim bytes = HexStringToBytes(“ABCD”)[/code]
bytes will now contain 2 elements, first with value of 0xAB (or 171 decimal) and second with value of 0xCD (or 205 decimal):
Here is the function:
[code] ‘convert hex string to byte array (taking 2 chars at a time)
Public Function HexStringToBytes(ByVal hex As String) As Byte()
Dim NumChars As Integer = hex.Length
Dim bytes((NumChars / 2) – 1) As Byte
Dim index As Integer
For index = 0 To NumChars – 1 Step 2
bytes(Math.Floor(index / 2)) = Convert.ToByte(hex.Substring(index, 2), 16)
Next
Return bytes
End Function[/code]
Validation:
It’s probably a good idea that you implement your own validation that the input needs to be multiples of 2, otherwise an exception will occur.