Client - Receiving Data from Server

Question

I am using the Windows.Networking.Sockets.StreamSocket class to connect to my service...I am easily sending data, and the server is initiating a send back to me for me to receive, but the problem is I have been unable to successfully make it work, I am trying to make it so I get a messagebox of the data received to pop up as a simple test, I either get access denied, or it not trying to pop up at all...

Can anyone help?  Because I am trying to start waiting for data after I 1st connect but in my form load, if I tell it to call the sub or function which is meant to do the work, it stops there, not executing the rest...if I put it last it maybe too late to listen for the data...it's a loop to listen for data, and i'm not even sure how I should be implementing it to begin with.

Answer 1

Can you post some code? We'd all just be guessing at the problem without it.

Based on the last paragraph, you're trying to execute a read synchronously, when you actually want to fire off an asynchronous read - but I'm guessing.

1. Connect

2. Start async Read

3. Send request to server

4 Read returns something.  If the read is complete, start another read and wait.  If all data in, go to 5.

5. Show Messagebox.  (Go to 2 if you have more data to send/receive if needed....)

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Darin R.

Answer 2

The code is as follows...

Private Client_Connection As New Windows.Networking.Sockets.StreamSocket

Private Async Sub Page_Loaded(sender As Object, e As RoutedEventArgs)
    Await Client_Connection.ConnectAsync(New Windows.Networking.HostName("IP ADDRESS"), "PORT")
    'Now that I'm connected, the server will send some data to receive.
    StartReceivingText()
End Sub

Private Sub StartReceivingText()
    Dim a As New IO.StreamReader(Client_Connection.InputStream.AsStreamForRead)
End Sub

I don't know what I need to be doing exactly...as you can see the part to start receiving text isn't even close to how it needs to be coded to work...

I didn't have much code besides what I showed already...I think I might need to use task.run(function() sub()) and such like this, and use the asstreamforread as I got, but I am not sure exactly how to read what I need...the server sends messages in the format of "Insert Message Here."+VbCrLf

I really need to read line by line exluding the VbCrLf which is a separator for new lines of data in my case...any ideas how I should be doing it?

Answer 3

You're not really starting to read text - you're simply assigning a streamreader.

What you need to do is call ReadLineAsync in that function too. It will start a read and return to the caller, something like:  (Sorry, this is in C#... I'm not so up-to-date on VB.NET)

I'd do this:

ReadLineAsync().ContinueWith( ()=>
{

     /// you have new data here to process, a complete line!

});

After you process the line, don't forget to call ReadLineAsync again to get the next line (there may be more in the buffer to handle right away, too...)

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Darin R.