RE: Create Form from Async-Callback

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Thanks, I'll have a look at the Cassini Sample Web Server.

The Problem with your code in the post before was, that, le'ts say, every
Client that connects would open a Form. So that means there could be
unlimited Forms so I need do genereate them when a Client connects.

I by now found a little Workaround which looks like:

/************ CODE ************/
using System;
using System.Net.Sockets;
using System.Net;
using System.Windows.Forms;
using System.Threading;

class Program {
static SynchronizationContext ctx;

static void Main(string[] args) {
Control ctl = new Control();
ctx = SynchronizationContext.Current;
StartListening();
Application.Run();
}

static void StartListening() {
TcpListener m_tcpListener = new TcpListener(IPAddress.Any, 1234);
m_tcpListener.Start();
m_tcpListener.BeginAcceptTcpClient(new
AsyncCallback(AcceptTcpClientCallback), m_tcpListener);
}

private static void AcceptTcpClientCallback(IAsyncResult ar) {
TcpListener listener = (TcpListener)ar.AsyncState;
TcpClient client = listener.EndAcceptTcpClient(ar);
listener.BeginAcceptTcpClient(new
AsyncCallback(AcceptTcpClientCallback), listener);

// This Method has to run in the "Main Thread", where
Application.Run() was fired
Program.ctx.Send(new SendOrPostCallback(CreateForm), null);
}

static void CreateForm(object o) {
Form myForm = new Form();
myForm.Show();
}
}
/************ END CODE ************/

Well, the most important part is that I added an SynchronizationContext
which I set on the Main Thread and then run the CreateForm on that Context
(ctx.Send()). So this solution is working so far but has something that
annoys me:

The first Line in the Main() is a
Control ctl = new Control();
Without this line, the SynchronizationContext.Current would be null so I
can't Send something to it.

I looked around in Reflector and found in the Constructor of a Control the
Line:
WindowsFormsSynchronizationContext.InstallIfNeeded();

Most of what's going on in this Function is Internal so I can't just call it
in my Programm.
So I guess I have to life with that.

So, do you think that this solution with the SynchronizationContext and it's
Send and the dummy Control is ok and solid?

Thanks!
//Roman
.

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