VB.NET: Simple Connect and Disconnect using System.Net.Sockets...[Resolved]

[toytoy]

Say i have declare a module for connection and two buttons...

one button has the method connect() and
the other has the method disconnect()....

how do i actually connect after i had disconnect my tcpC...
I could not connect after i disconnect my connection...

Imports System.Net.Sockets 

Module Connection 

    Dim tcpC As New TcpClient 
  
     Public Sub Connect() 

             'Connect from this to the server at Port 6970 
              Try 
                   tcpC.Connect("152.138.40.200", 6970) 
              Catch e As Exception 
                   Console.WriteLine(e.ToString()) 
              End Try 
    End Sub 

    Public Sub Disconnect() 
            tcpC.Close() 
    End Sub 

End Module

Thanks

[Mike Hildner]

What's the exception? Guessing something about the object being disposed?

[toytoy]

there is no exception...

the connection just break out after i disconnect..

therefore i can't connect again using the "Connect button"until i re-start the whole program..

[Mike Hildner]

I don't understand. What do you mean by "the connection just break out"? If you step through your code when you try to connect again, what happens?

[toytoy]

that means:

1 step: when i start the program, it can connect to the server through the "Connect" Buton...

2 steps: when i click the "Disconnect" button, the connection is then closed...

3 steps: However the connection could not connect again when i click the "Connect" button the second time..

the connection just break out with no exception...
my string that i sent over, cannot get cross it the second time...
that means it could only get connected once..

[Mike Hildner]

ok, I'm suprised no exception is happening. Maybe you don't see it because the exception is writing to the console? You could try not catching the exception and then see what's happening.

Regardless, I believe your problem is that you cannot close a socket and then reopen it, because the close method calls dispose. What you should do is create a new TcpClient every time you need to connect. Something like

Imports System.Net.Sockets 
 
Module Connection 
    ' Get rid of the new keywork
    'Dim tcpC As New TcpClient 
     Dim tcpC as TcpClient
  
     Public Sub Connect() 
             'Instantiate here
              tcpC = New TcpClient
             'Connect from this to the server at Port 6970 
              Try 
                   tcpC.Connect("152.138.40.200", 6970) 
              Catch e As Exception 
                   Console.WriteLine(e.ToString()) 
              End Try 
    End Sub     Public Sub Disconnect() 
            tcpC.Close() 
    End Sub End Module

Notice how tcpC gets declared in a way that both methods can use it, but it gets instantiated every time you attempt to connect.

HTH,
Mike

[toytoy]

Mike Hildner thanks...

I get it..