How would I read an ascii string of hex values in to a byte array?

Question

How would I copy/convert a string containing an ascii representation of hex values in to a byte array containing the actual hex values? For example, I have a variable containing the hex values delimited by spaces (I can change the delimiter):

myString = "24 01 66 09 13 2F 1E 00 00 4E"

I want to put those values into a byte array:

Dim myByteArr(9) as Byte

Hans Passant · Accepted Answer · 2010-07-21 04:01:12Z

2

Public Shared Function HexToBytes(ByVal s As String) As Byte()
    Dim bytes As String() = s.Split(" "c)
    Dim retval(bytes.Length - 1) As Byte
    For ix As Integer = 0 To bytes.Length - 1
        retval(ix) = Byte.Parse(bytes(ix), System.Globalization.NumberStyles.HexNumber)
    Next
    Return retval
End Function

answered Jul 21, 2010 at 4:01

Hans Passant

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1 Comment

Gideon Engelberth Over a year ago

You could further shorten this by using Array.ConvertAll, if desired

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