C#——Socket

最近公司让我搞个socket小程序（服务端）。

主要的功能：客户端发字符串到服务端，服务端接收后在界面上显示。

参照了网上许多代码，自己从中修改整理代码。

 public Form4()
        {
            InitializeComponent();
            this.Width = 1298;
            this.Height = 841;
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            System.Timers.Timer timer = new System.Timers.Timer();
            timer.Enabled = true;
            timer.Interval = 60000;//执行间隔时间,单位为毫秒   
            timer.Start();
            timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
            //设置IP和端口
            SetServerIPAndPort();

        }
         /// <summary>
        /// 根据当前程序目录的文本文件‘ServerIPAndPort.txt’内容来设定IP和端口
        /// 格式：127.0.0.1:8885
        /// </summary>
        private void SetServerIPAndPort()
        {
            try
            {

                FileStream fs = new FileStream("ServerIPAndPort.txt", FileMode.Open);
                StreamReader sr = new StreamReader(fs);
                string IPAndPort = sr.ReadLine();

                ServerIP = IPAndPort.Split(':')[0]; //设定IP
                //ServerIP = GetLocalIPAddress();//设定IP
                port = int.Parse(IPAndPort.Split(':')[1]); //设定端口
                Timer_out = int.Parse(IPAndPort.Split(':')[2]);//设定连接超时时间（毫秒）
                ipEnd = new IPEndPoint(IPAddress.Parse(ServerIP), port);
                //定义套接字类型
                serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //连接
                serverSocket.Bind(ipEnd);
                //开始侦听
                serverSocket.Listen(10);
                //AddItemToListBox(string.Format("开始在{0}监听连接", ServerIP, port));
                Thread myThread = new Thread(ListenClientConnect);
                myThread.Start();  
                sr.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("配置IP与端口失败，错误原因：" + ex.Message);
                Application.Exit();
            }
        }   
        /// <summary>  
        /// 监听客户端连接  
        /// </summary>
        private void ListenClientConnect()
        {
            Socket clientSocket = null;
            while (true)
            {
                try
                {
                    clientSocket = serverSocket.Accept();
                }
                catch {
                    //当单击‘停止监听’或者退出此窗体时 AcceptTcpClient() 会产生异常
                    //因此可以利用此异常退出循环
                    break;
                }
                //clientSocket.Send(Encoding.ASCII.GetBytes("Server Say Hello"));
                Thread receiveThread = new Thread(ReceiveMessage);
                receiveThread.Start(clientSocket);
            }
        }    
        /// <summary>
        /// 接收数据
        /// </summary>
        /// <param name="socket"></param>
        /// <param name="timeout"></param>
        /// <returns></returns>
        private string Receive(Socket socket)
        {

            string result = string.Empty;
            //socket.ReceiveTimeout = Timer_out * 1000 * 60;
            List<byte> data = new List<byte>();
            byte[] buffer = new byte[1024];
            int length = 0;
            try
            {
                while ((length = socket.Receive(buffer)) > 0)
                {
                    for (int j = 0; j < length; j++)
                    {
                        data.Add(buffer[j]);
                    }
                    if (length < buffer.Length)
                    {
                        break;
                    }
                }
            }
            catch { }
            if (data.Count > 0)
            {
                result = Encoding.Default.GetString(data.ToArray(), 0, data.Count);
            }
            return result;
        }
        /// <summary>  
        /// 接收消息  
        /// </summary>  
        /// <param name="clientSocket"></param>
        private void ReceiveMessage(object clientSocket)
        {
            flg = true;
            myClientSocket = (Socket)clientSocket;
            byte[] result = new byte[1024];
            while (flg)
            {
                try
                {
                    //通过clientSocket接收数据  
                    //int receiveNumber = myClientSocket.Receive(result,result.Length,0);
                    //AddItemToListBox(Encoding.Unicode.GetString(result, 0, receiveNumber));
                    AddItemToListBox(Receive(myClientSocket));
                    flg = false;
                    //break;
                }
                catch (Exception ex)
                {
                    AddItemToListBox(ex.Message);
                    myClientSocket.Shutdown(SocketShutdown.Both);
                    myClientSocket.Close();
                    break;
                }
            }
        }