C# C/S多窗体程序 showdialog后阻塞
登陆成功后，new了一个新窗体，并且需要在新窗体中与服务器沟通，现在可以把请求发给服务器，客户端这边执行到showdialog后就阻塞了，不能收到服务器发过来的命令了，客户端这边只有一个线程是用来与服务器沟通，客户端这边是不是需要一个新线程了执行showdialog方法？我的程序里有多个窗体，那是不是每执行一次showdialog方法，就需要创建一个新的线程呢？

contactWithServer = new ContactWithServer(this, user);

Thread clientcontactserverThread = new Thread(new ThreadStart(contactWithServer.ReceiveMsg));

            clientcontactserverThread.Start();

 


   

public void ReceiveMsg()

        {

            while (true)

            {

                lock (this)

                {

                    // 调用接收回调函数

                    IAsyncResult iar = udpReceiveClient.BeginReceive(new AsyncCallback(ReceiveCallback), udpReceiveState);

                    receiveDone.WaitOne();

                    Thread.Sleep(100);

                }

            }

        }

        private void ReceiveCallback(IAsyncResult iar)

        {

            UdpState udpReceiveState = iar.AsyncState as UdpState;

            if (iar.IsCompleted)

            {

                data = udpReceiveState.udpClient.EndReceive(iar, ref udpReceiveState.ipEndPoint);

                if (data.Length < 20)                       //只有命令

                        commandStr = Encoding.ASCII.GetString(data);