Improve company productivity with a Business Account.Sign Up

x
?
Solved

UDP_listener, how to display a hex string on the Data_Arrived event.

Posted on 2008-09-30
8
Medium Priority
?
309 Views
Last Modified: 2013-12-26
I'm using a simple example like this to receive incoming ascii but when
I'm receiving a hex dump, nothing displays.

Private Sub Form_Load()
server.LocalPort = 5890
server.Bind Winsock1.LocalPort
End Sub

Private Sub server_DataArrival(ByVal bytesTotal As Long)
Dim mydata As String
server.GetData mydata

Text1 = Text1 & mydata & vbCrLf
End Sub


I think it has something to do with this part of the code
Private Sub server_DataArrival(ByVal bytesTotal As Long)

Any help would be appreciated.



0
Comment
Question by:Bward323
  • 3
  • 3
  • 2
8 Comments
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 22614717
Try it this way instead:

    Private Sub server_DataArrival(ByVal bytesTotal As Long)
        Dim mydata As String
        server.GetData mydata, vbString
        Text1.Text = Text1.Text & mydata & vbCrLf
    End Sub

0
 

Author Comment

by:Bward323
ID: 22615322
for some reason I'm not getting anything. I added this line just to see when the event fires

msgbox "event fired " & mydata

and all I am getting in the msgbox is "event fir4ed"
0
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 22615631
=\

Are you getting a value in "bytesTotal"?

 Private Sub server_DataArrival(ByVal bytesTotal As Long)
        Dim mydata As String
        server.GetData mydata, vbString
        Debug.Print "DataArrival:"
        Debug.Print "bytesTotal = " & bytesTotal
        Debug.Print "mydata = " & mydata
    End Sub

0
What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

 

Author Comment

by:Bward323
ID: 22616518
Yes I am. The client is a GPRS device that I have send a test message....   "12345"
It sends this via UDP as a Hex Dump

The only thing I am seeing displayed on the screen is a message box that says,
 bytes total = 9
0
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 22616593
I'm not sure what's going wrong...and obviously I can't test it from here.  =(

I would start trouble shooting by starting with a fresh project and only the BARE BONES minimum code to receive a simple message and Debug.Print or MsgBox it.  This way you can determine if something else in your current project is possibly interfering...

0
 
LVL 3

Expert Comment

by:moonlight
ID: 22669175
Thanks Idle Mind for showing me this thread. Bward323, I have exactly the same problem:

http://www.experts-exchange.com/Programming/Languages/Winsock/Q_23796509.html#a22668967
0
 

Author Comment

by:Bward323
ID: 22886329
I found that the reason I was seeing  a string length  but nothing was showing up was that iit was a hex string.. I used this routine to convert from hex to ascii
Text1.text = HexString(strData)


Private Function HexString(EvalString As String) As String
Dim intStrLen As Integer
Dim intLoop As Integer
Dim strHex As String

EvalString = Trim(EvalString)
intStrLen = Len(EvalString)
For intLoop = 1 To intStrLen
strHex = strHex & " " & Hex(Asc(Mid(EvalString, intLoop, 1)))
Next
HexString = strHex

End Function
0
 
LVL 3

Accepted Solution

by:
moonlight earned 500 total points
ID: 22887415
yes it turned out it was two different things eventhough the same symptom. Glad you solved it too.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Having just graduated from college and entered the workforce, I don’t find myself always using the tools and programs I grew accustomed to over the past four years. However, there is one program I continually find myself reverting back to…R.   So …
You can of course define an array to hold data that is of a particular type like an array of Strings to hold customer names or an array of Doubles to hold customer sales, but what do you do if you want to coordinate that data? This article describes…
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

607 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question