Socket Client Problem

Hi everyone,

I have a problem for my new application on Windows Phone 7 & 8. I have a server on C# which create a socket listener and I want my Windows Phone app and my Windows 8 app connect to it to transfert some data between them.

My connection with my W8 app works, but the WP8 app throw a System.Net.Sockets.SocketError.ConnectionRefused.

I want to try on Windows Phone 7 but there are "no connection" so I have to try my app on my Lumia 800, but I think it will be the same error.

This is my code for the server C#:

[CODE]
private void StartListener()
{
_listenerThread = new Thread(RunListener);
_listenerThread.Start();
}

private void RunListener()
{
_listener = new TcpListener(IPAddress.Any, 12350);
_listener.Start();

while(true)
{
try
{
TcpClient client = _listener.AcceptTcpClient();
}
catch (Exception) { }
}
}
[/CODE]

Now the Windows Phone app:
[CODE]
string result = string.Empty;
IPAddress address = string.Empty;

address = IPAddress.Parse("127.0.0.1");

IPEndPoint endPoint = new IPEndPoint(address, 12350);

// Create a stream-based, TCP socket using the InterNetwork Address Family.
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

// Create a SocketAsyncEventArgs object to be used in the connection request
SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
socketEventArg.RemoteEndPoint = endPoint;

// Inline event handler for the Completed event.
socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs e)
{
// Retrieve the result of this request
result = e.SocketError.ToString();

// ------------------------------------------------------ result equal to ConnectionRefused --------------------------------------------

// Signal that the request is complete, unblocking the UI thread
_clientDone.Set();
});

// Sets the state of the event to nonsignaled, causing threads to block
_clientDone.Reset();

// Make an asynchronous Connect request over the socket
_socket.ConnectAsync(socketEventArg);

// Block the UI thread for a maximum of TIMEOUT_MILLISECONDS milliseconds.
// If no response comes back within this time then proceed
_clientDone.WaitOne(TIMEOUT_MILLISECONDS);

return result;
}
[/CODE]

An idea of what the problem is?

Thanks in advance.

127.0.0.1 is the localhost address, it means the same device which issues the connection request. The Windows 8 app can connect to the server, because it is running on the same Windows 8 machine. However even the emulator runs on a separate virtualized machine with a separate network stack. And if you try with a real phone, it is going to be more obvious that it is a completely separate machine.
So use the real IP address of your Windows 8 host. [B]ipconfig [/B] is a command which can tell you your IP address(es), but it is probably available via the GUI too, just I am not too familiar with Windows 8 yet.

Hi,

It works with my IP adress !

My Windows Phone emulator runs on a separate virtualized machine with a separate network stack so I understand, but my Windows 8 app was also launched in emulator like the Windows Phone emulator but it worked with 127.0.0.1, strange.

Anyway, thank you very much!