Question

i have a winform app that contains a form1 and the program.cs file. in program.cs i initialize form1 and besides that, i have a server included. My question is : how can i stop the threads when i close the form? here is part of my program.cs file :

public void start()
        {
            this.tcpListener = new TcpListener(IPAddress.Any, 3000);
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
        }


        private void ListenForClients()
        {
            //MessageBox.Show("in thread");
            this.tcpListener.Start();

            while (true)
            {
                //blocks until a client has connected to the server
                TcpClient client = this.tcpListener.AcceptTcpClient();

                //create a thread to handle communication 
                //with connected client
                sThread a = new sThread(form1, listaThreads);
                listaThreads.Add(a);
                Thread clientThread = new Thread(new ParameterizedThreadStart(a.HandleClientComm));
                clientThread.Start(client);
            }
        }

Answer 1

You can call Close() of the TcpListener from a different thread.

TcpListener.Close() will simply call Socket.Close() and that is thread safe.

I’m not sure how the AcceptTcpClient reacts, but you’ll have to check that. At least it will stop your listening thread in a normal way.

So, you do:

tcpListener.Close();
listenThread.Join();

That will nicely close your thread.