public class Connection

    {

        Socket _connection;

        public Connection(Socket socket)

        {

            _connection = socket;

        }

        public void WaitForSendData()

        {

            while (true)

            {

                byte[] bytes = new byte[];

                string data = "";

                //等待接收消息

                int bytesRec = this._connection.Receive(bytes);

                if (bytesRec == )

                {

                    ReceiveText("客户端[" + _connection.RemoteEndPoint.ToString() + "]连接关闭...");

                    break;

                }

                data += Encoding.UTF8.GetString(bytes, , bytesRec);

                ReceiveText("收到消息：" + data);

                string sendStr = "服务端已经收到信息！";

                byte[] bs = Encoding.UTF8.GetBytes(sendStr);

                _connection.Send(bs, bs.Length, );

            }

        }

        public delegate void ReceiveTextHandler(string text);

        public event ReceiveTextHandler ReceiveTextEvent;

        private void ReceiveText(string text)

        {

            if (ReceiveTextEvent != null)

            {

                ReceiveTextEvent(text);

            }

        }

    }

public class SocketListener

    {

        public Hashtable Connection = new Hashtable();

        public void StartListen()

        {

            try

            {

                //端口号、IP地址

                int port = ;

                string host = "127.0.0.1";

                IPAddress ip = IPAddress.Parse(host);

                IPEndPoint ipe = new IPEndPoint(ip, port);

                //创建一个Socket类

                Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                s.Bind(ipe);//绑定2000端口

                s.Listen();//开始监听

                ReceiveText("启动Socket监听...");

                while (true)

                {

                    Socket connectionSocket = s.Accept();//为新建连接创建新的Socket

                    ReceiveText("客户端[" + connectionSocket.RemoteEndPoint.ToString() + "]连接已建立...");

                    Connection gpsCn = new Connection(connectionSocket);

                    gpsCn.ReceiveTextEvent += new Connection.ReceiveTextHandler(ReceiveText);

                    Connection.Add(connectionSocket.RemoteEndPoint.ToString(), gpsCn);

                    //在新线程中启动新的socket连接，每个socket等待，并保持连接

                    Thread thread = new Thread(new ThreadStart(gpsCn.WaitForSendData));

                    thread.Name = connectionSocket.RemoteEndPoint.ToString();

                    thread.Start();

                }

            }

            catch (ArgumentNullException ex1)

            {

                ReceiveText("ArgumentNullException:" + ex1);

            }

            catch (SocketException ex2)

            {

                ReceiveText("SocketException:" + ex2);

            }

        }

        public delegate void ReceiveTextHandler(string text);

        public event ReceiveTextHandler ReceiveTextEvent;

        private void ReceiveText(string text)

        {

            if (ReceiveTextEvent != null)

            {

                ReceiveTextEvent(text);

            }

        }

    }

 /// <summary>

    /// Interaction logic for MainWindow.xaml

    /// </summary>

    public partial class MainWindow : Window

    {

        SocketListener listener;

        public MainWindow()

        {

            InitializeComponent();

            InitServer();

        }

        private void InitServer()

        {

            System.Timers.Timer t = new System.Timers.Timer();

            //实例化Timer类，设置间隔时间为5000毫秒；

            t.Elapsed += new System.Timers.ElapsedEventHandler(CheckListen);

            //到达时间的时候执行事件；

            t.AutoReset = true;

            t.Start();

        }

        private void CheckListen(object sender, System.Timers.ElapsedEventArgs e)

        {

            if (listener != null && listener.Connection != null)

            {

                //label2.Content = listener.Connection.Count.ToString();

                ShowText("连接数：" + listener.Connection.Count.ToString());

            }

        }

        private void button1_Click(object sender, RoutedEventArgs e)

        {

            Thread th = new Thread(new ThreadStart(SocketListen));

            th.Start();

        }

        private void SocketListen()

        {

            listener = new SocketListener();

            listener.ReceiveTextEvent += new SocketListener.ReceiveTextHandler(ShowText);

            listener.StartListen();

        }

        public delegate void ShowTextHandler(string text);

        ShowTextHandler setText;

        private void ShowText(string text)

        {

            if (System.Threading.Thread.CurrentThread != txtSocketInfo.Dispatcher.Thread)

            {

                if (setText == null)

                {

                    setText = new ShowTextHandler(ShowText);

                }

                txtSocketInfo.Dispatcher.BeginInvoke(setText, DispatcherPriority.Normal, new string[] { text });

            }

            else

            {

                txtSocketInfo.AppendText(text + "\n");

            }

        }

        private void button2_Click(object sender, RoutedEventArgs e)

        {

            ClientWindow client = new ClientWindow();

            client.Show();

        }

    }

 /// <summary>

    /// Interaction logic for MainWindow.xaml

    /// </summary>

    public partial class MainWindow : Window

    {

        SocketListener listener;

        public MainWindow()

        {

            InitializeComponent();

            InitServer();

        }

        private void InitServer()

        {

            System.Timers.Timer t = new System.Timers.Timer();

            //实例化Timer类，设置间隔时间为5000毫秒；

            t.Elapsed += new System.Timers.ElapsedEventHandler(CheckListen);

            //到达时间的时候执行事件；

            t.AutoReset = true;

            t.Start();

        }

        private void CheckListen(object sender, System.Timers.ElapsedEventArgs e)

        {

            if (listener != null && listener.Connection != null)

            {

                //label2.Content = listener.Connection.Count.ToString();

                ShowText("连接数：" + listener.Connection.Count.ToString());

            }

        }

        private void button1_Click(object sender, RoutedEventArgs e)

        {

            Thread th = new Thread(new ThreadStart(SocketListen));

            th.Start();

        }

        private void SocketListen()

        {

            listener = new SocketListener();

            listener.ReceiveTextEvent += new SocketListener.ReceiveTextHandler(ShowText);

            listener.StartListen();

        }

        public delegate void ShowTextHandler(string text);

        ShowTextHandler setText;

        private void ShowText(string text)

        {

            if (System.Threading.Thread.CurrentThread != txtSocketInfo.Dispatcher.Thread)

            {

                if (setText == null)

                {

                    setText = new ShowTextHandler(ShowText);

                }

                txtSocketInfo.Dispatcher.BeginInvoke(setText, DispatcherPriority.Normal, new string[] { text });

            }

            else

            {

                txtSocketInfo.AppendText(text + "\n");

            }

        }

        private void button2_Click(object sender, RoutedEventArgs e)

        {

            ClientWindow client = new ClientWindow();

            client.Show();

        }

    }