[RESOLVED] String Array to Byte Array conversion

[stephenpark]

Hi, I have array converting problem which is in use of Image processing unit.

I got a PictureBox image convert to byte array.

Dim img as image = Picturebox1.Image
Dim ms = New MemoryStream()
img.Save(ms, Imaging.ImageFormat.Jpeg) ' Use appropriate format here
Dim bytes = ms.ToArray()

And this "bytes" array, I convert to string array with "," delimiter, for send via TCP connection.

Dim msg = String.Join(",", bytes)

Now I have all string which converted from byte array with "," delimiter. Like this:
"217,0,1,10,215,128,104,....."

And I have to change this string to byte array again in order to convert image format.

Function StringToImage(Byval msg as String) as Image

   Dim Bytes As New List(Of Byte)
   Dim message() As String = msg.Split(",")

   For i As Integer = 0 To UBound(message)
        Bytes.Add(CByte(message(i)))
   Next

   Return CType(Image.FromStream(New IO.MemoryStream(Bytes.ToArray)), Image)

End Function

Everything is Ok, except For...Next loop at StringToImage function, it takes much time.

I send this string to server via TCP/IP and server relay string to corresponding client,
it takes only 0.4sec for 400KB jpeg file but this for..next loop takes like 0.5 sec more.

Is there any fastest way to convert string array to byte array?
I saw some article which use;

Dim Bytes() As Byte = Array.ConvertAll(Of String, Byte)(message, Function(strHold) Convert.ToByte(strHold, 16))

Like this, but I try and got error only.
Important thing is, this string array only contains numbers, which must convert to byte accordingly,
because this string array is converted from Image -> byte array -> string array.
Anybody can help me out?