winform socket编程之TCPListener

运行结果：

服务端代码

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;

 namespace SocketServer
 {
     public partial class Form1 : Form
     {
         private List<TcpClient> clientList=new List<TcpClient>();///保存客户连接socket
         private TcpListener tcpListener;///监听类

         public Form1()
         {
             InitializeComponent();
         }

         private void button3_Click(object sender, EventArgs e)
         {
             tcpListener = new TcpListener(IPAddress.Any, );//监听3000端口
             tcpListener.Start();//开始监听
             Thread listenThread = new Thread(new ThreadStart(ListenForClients));///新建线程来处理新的客户端连接
             listenThread.Start();

         }

         /// <summary>
         /// 处理客户端连接线程
         /// </summary>
         private void ListenForClients()
         {
             while (true)
             {
                 //blocks until a client has connected to the server
                 TcpClient client = this.tcpListener.AcceptTcpClient();
                 clientList.Add(client);
                 listBox2.BeginInvoke(new Action(()=>{listBox2.Items.Add(client.Client.RemoteEndPoint.ToString());}));
                 //create a thread to handle communication
                 //with connected client
                 Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                 clientThread.Start(client);

             }
         }

         /// <summary>
         /// 读客户端数据
         /// </summary>
         /// <param name="client"></param>
         private void HandleClientComm(object client)
         {
             TcpClient tcpClient = (TcpClient)client;
             NetworkStream clientStream = tcpClient.GetStream();
             byte[] message = new byte[];
             int bytesRead;
             while (true)
             {
                 bytesRead = ;
                 try
                 {
                     //blocks until a client sends a message，每个线程在这一句时会中断一下，等待客户端有数据传进来后再往下执行
                     bytesRead = clientStream.Read(message, , );
                 }
                 catch
                 {
                     //a socket error has occured
                     break;
                 }
                 if (bytesRead == )
                 {
                     //the client has disconnected from the server
                     break;
                 }

                 //message has successfully been received
                 UTF8Encoding utf8 = new UTF8Encoding();
                 System.Diagnostics.Debug.WriteLine(utf8.GetString(message, , bytesRead));
                 ///线程里修改UI界面的内容要用invoke方法和委托
                 listBox1.Invoke(new Action(() => { listBox1.Items.Add(utf8.GetString(message, , bytesRead)); }));
             }

             //tcpClient.Close();//不要关闭
         }

         /// <summary>
         /// 向所有客户端发送
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void button4_Click(object sender, EventArgs e)
         {
             foreach (var item in clientList)
             {
                 NetworkStream stream=item.GetStream();
                 stream.Write(UTF8Encoding.UTF8.GetBytes(this.textBox1.Text), , UTF8Encoding.UTF8.GetBytes(this.textBox1.Text).Length);
             }
         }
     }
 }

客户端代码

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;

 namespace EdoecSpeaker
 {
     public partial class Form1 : Form
     {
         TcpClient client;
         public Form1()
         {
             InitializeComponent();
         }

       /// <summary>
       /// 连接服务器
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
         private void button3_Click(object sender, EventArgs e)
         {
             if (client==null)
             {
                 client = new TcpClient();
                 IPEndPoint serverEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), );
                 client.Connect(serverEndPoint);
                 Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                 clientThread.Start(client);
             }
             //clientStream.Flush();
         }

         /// <summary>
         /// 接收消息
         /// </summary>
         /// <param name="client"></param>
         private void HandleClientComm(object client)
         {
             TcpClient tcpClient = (TcpClient)client;
             NetworkStream clientStream = tcpClient.GetStream();

             byte[] message = new byte[];
             int bytesRead;

             while (true)
             {
                 bytesRead = ;

                 try
                 {
                     //blocks until a client sends a message
                     bytesRead = clientStream.Read(message, , );
                 }
                 catch
                 {
                     //a socket error has occured
                     break;
                 }

                 if (bytesRead == )
                 {
                     //the client has disconnected from the server
                     break;
                 }

                 //message has successfully been received
                 UTF8Encoding utf8 = new UTF8Encoding();
                 System.Diagnostics.Debug.WriteLine(utf8.GetString(message, , bytesRead));
                 listBox1.Invoke(new Action(() => { listBox1.Items.Add(utf8.GetString(message, , bytesRead)); }));
             }
             //tcpClient.Close();
         }

         /// <summary>
         /// 发送消息
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void button4_Click(object sender, EventArgs e)
         {
             NetworkStream clientStream = client.GetStream();
             clientStream.Write(UTF8Encoding.UTF8.GetBytes(this.textBox1.Text), , UTF8Encoding.UTF8.GetBytes(this.textBox1.Text).Length);
         }
     }
 }