Question

I have a socket, I’m trying to send information from the client to the server. Both are located on the same network, with different LAN IP’s (as follows):

My server is my C# application. – 192.168.0.2
My client is my Android application. – 192.168.0.7

Here’s my TcpListener for the server:

server = new TcpListener(IPAddress.Parse("192.168.0.7"), 7079);

Here’s my connection on the client:

Socket conn = new Socket("192.168.0.2", 7079);

Firstly, I wasn’t sure what to put as the TcpListener IP. Obviously what I have is wrong, because it throws a SocketException: The requested address is not valid in its context.

EDIT:

First problem is resolved, I ran using emulator and put 10.0.2.2 for the connection IP. Now, C# is throwing an exception. Here’s the surrounding code:

full code removed to prevent leaching

On the line beginning with while, I get an ObjectDisposedException saying that the NetworkStream is disposed. Any help?

Answer 1

You should not be putting an IP address for the TCP Listener. The IP address that clients will use to connect to is just the IP address of the computer. Only the client should add an IP address for where the Socket should connect to.

edit: By that I mean you should be using “127.0.0.1” for the TCPListener because that points to itself. Then you accept the client using the AcceptTcpClient method.

Found you an example http://theanti9.wordpress.com/2008/02/13/c-tcplistener-example/

another edit: Sorry, maybe it is IPAddress.Any for the Listener IP Address? My C# is rusty for what it expects, but it should be one of those two.

another edit: After looking at your latest code edit, you are calling client.Close() in your listening loop. This is causing the client to close the Socket connection and thus invalidate the Stream object you created. That is why it is giving you the ObjectDisposed error, because the Stream doesn’t exist anymore.