服务器作为中介，实现客户端之间的数据通信​

【实例简介】

服务器作为中介，实现客户端之间的数据通信

【实例截图】

【核心代码】

  //监听客户端发来的请求
        private void watchconnecting()
        {
            Socket connection = null;
            while (true)  //持续不断监听客户端发来的请求   
            {
                try
                {
                    connection = socketwatch.Accept();
                }
                catch (Exception ex)
                {
                    rec_info.AppendText(ex.Message); //提示套接字监听异常   
                    break;
                }
                //获取客户端的IP和端口号
                IPAddress clientIP = (connection.RemoteEndPoint as IPEndPoint).Address;
                int clientPort = (connection.RemoteEndPoint as IPEndPoint).Port;

                //让客户显示"连接成功的"的信息
                string sendmsg = "连接服务端成功！\r\n"   "本地IP:"   clientIP   "，本地端口"   clientPort.ToString();
              //  byte[] arrSendMsg = Encoding.ASCII.GetBytes(sendmsg);
                byte[] arrSendMsg = Encoding.GetEncoding("GB2312").GetBytes(sendmsg);
                connection.Send(arrSendMsg);


                RemoteEndPoint = connection.RemoteEndPoint.ToString(); //客户端网络结点号
                rec_info.AppendText("成功与"   RemoteEndPoint   "客户端建立连接！\t\n");     //显示与客户端连接情况
                dic.Add(RemoteEndPoint, connection);    //添加客户端信息
              //  dic[RemoteEndPoint].Send(Encoding.ASCII.GetBytes("Server Say Hello"));   //发送数据
                OnlineList_Disp(RemoteEndPoint);    //显示在线客户端


                //IPEndPoint netpoint = new IPEndPoint(clientIP,clientPort);

                IPEndPoint netpoint = connection.RemoteEndPoint as IPEndPoint;

                //创建一个通信线程    
                ParameterizedThreadStart pts = new ParameterizedThreadStart(recv);
                Thread thread = new Thread(pts);
                thread.IsBackground = true;//设置为后台线程，随着主线程退出而退出   
                //启动线程   
                thread.Start(connection);
            }
        }