TCP的代码

　　视频已经发布，这里是所有的代码仅供参考.

　　TCP服务器:

　　MainWindow里面的代码：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
 using System.Net.Sockets;
 using System.Net;
 using System.IO;
 using System.Threading;

 namespace TCPServerExample
 {
     /// <summary>
     /// MainWindow.xaml 的交互逻辑
     /// </summary>
     public partial class MainWindow : Window
     {
         TcpListener myListener;
         List<User> userList = new List<User>();
         bool isExit;
         IPAddress ip;
         public MainWindow()
         {
             InitializeComponent();
             button1.IsEnabled = true;
             button2.IsEnabled = false;
         }
         //开始按钮
         private void button1_Click(object sender, RoutedEventArgs e)
         {
             button1.IsEnabled = false;
             button2.IsEnabled = true;
             isExit = true;
             //获取本机IP地址
             IPAddress[] ips = Dns.GetHostAddresses(Dns.GetHostName());
             foreach (var item in ips)
             {
                 if (item.AddressFamily==AddressFamily.InterNetwork)
                 {
                     ip = item;
                     break;
                 }
             }

             myListener = new TcpListener(ip, );
             IPEndPoint iep = new IPEndPoint(ip, );
             myListener.Start();
             //textBlock1.Text += string.Format("服务器在{0}的{1}打开监听",ips[5],port);
             textBlock1.Text += string.Format("服务器在{0}打开监听\n", iep);
             Thread t1 = new Thread(ListenClientConnect);
             t1.Start();
         }

         //第一步，开启监听
         private void ListenClientConnect()
         {
             //获取相应客户端套接字
             while (isExit)
             {
                 try
                 {
                     TcpClient newClient = myListener.AcceptTcpClient();
                     User user = new User(newClient);
                     userList.Add(user);
                     Action act = delegate()
                     {
                         textBlock1.Text += string.Format("用户{0}连接成功，当前在线用户数为{1}\n",
                             newClient.Client.RemoteEndPoint, userList.Count);
                     };
                     textBlock1.Dispatcher.Invoke(act);
                     Thread t2 = new Thread(ReceiveMessage);
                     t2.Start(user);
                 }
                 catch
                 {
                     break;
                 }

             }
         }
         //第二步，接收消息
         private void ReceiveMessage(Object user1)
         {
             User newuser = (User)user1;
             while (isExit)
             {
                 try
                 {
                     string message = newuser.br.ReadString();
                     AddMessage(string.Format("客户端：{0}发送信息：{1}\n",
                             newuser.client.Client.RemoteEndPoint, message));
                    string[] array = message.Split(',');
                     switch (array[])
                     {
                         case "Login":
                             {
                                 newuser.username = array[];
                                 //服务器告诉所有在线客户端，有新的用户登录
                                 for (int i = ; i < userList.Count; i++)
                                 {
                                     if (userList[i].username != newuser.username)
                                     {
                                         userList[i].bw.Write("Login," + array[]);
                                     }
                                     newuser.bw.Write("Login," + userList[i].username);
                                 }
                                 break;
                             }
                         case "Logout":
                             {
                                 for (int i = ; i < userList.Count; i++)
                                 {
                                     if (userList[i].username != newuser.username)
                                     {
                                         userList[i].bw.Write("Logout," + array[]);
                                     }
                                 }
                                 userList.Remove(newuser);
                                 AddMessage("客户端" + newuser.username + "退出，" + "当前用户数为：" + userList.Count);
                                 return;
                             }
                         case "Talk":
                             {
                                 string target = array[];
                                 for (int i = ; i < userList.Count; i++)
                                 {
                                     if (userList[i].username == target)
                                     {
                                         userList[i].bw.Write("Talk," + newuser.username + "," + array[]);
                                     }
                                 }
                                 break;
                             }
                         default:
                             {
                                 MessageBox.Show("什么意思?");
                                 break;
                             }
                     }
                 }
                 catch
                 {
                     break;
                 }
             }
         }
         //第三步，添加消息到textBlock
         private void AddMessage(string message)
         {
             Action act = delegate()
             {
                 textBlock1.Text += message;
             };
             textBlock1.Dispatcher.Invoke(act);
         }

         //结束按钮
         private void button2_Click(object sender, RoutedEventArgs e)
         {
             button1.IsEnabled = true;
             button2.IsEnabled = false;
             for (int i = ; i < userList.Count; i++)
             {
                 try
                 {
                     userList[i].bw.Write("服务器已停止监听！");
                 }
                 catch
                 {
                     break;
                 }
                 userList[i].Close();
             }
             isExit = false;
             Thread.Sleep();
             myListener.Stop();

             for (int i = ; i < userList.Count; i++)
             {
                 userList[i].Close();
             }
             textBlock1.Text += "监听结束！";
         }
     }
 }

　　User类的代码：

　　

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Net.Sockets;
 using System.IO;

 namespace TCPServerExample
 {
     class User
     {
         public string username{get;set;}
         public TcpClient client{get;set;}
         public BinaryWriter bw { get; set; }
         public BinaryReader br { get; set; }
         public User(TcpClient newclient)
         {
             this.client = newclient;
             NetworkStream networkstream = newclient.GetStream();
             bw = new BinaryWriter(networkstream);
             br = new BinaryReader(networkstream);

         }

         public void Close()
         {
             client.Close();
             bw.Close();
             br.Close();

         }
     }
 }

　　TCP客户端：

　　

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
 using System.Net.Sockets;
 using System.Net;
 using System.IO;
 using System.Threading;

 namespace TCPClientExample
 {
     /// <summary>
     /// MainWindow.xaml 的交互逻辑
     /// </summary>
     public partial class MainWindow : Window
     {
         TcpClient newClient;
         BinaryWriter bw;
         BinaryReader br;
         string username;
         //enum item { listBox1, textBox1 };
         //enum opreation { add,remove};
         public MainWindow()
         {
             InitializeComponent();
         }
         private void button1_Click(object sender, RoutedEventArgs e)
         {
             button1.IsEnabled = false;
             username = textBox2.Text;
             //创建套接字（TcpClient对象）
             newClient = new TcpClient();
             //获取服务器IP地址
             IPAddress ip = IPAddress.Parse("10.0.2.15");
             try
             {
                 newClient.Connect(ip, );
                 listBox1.Items.Add("连接成功！");
             }
             catch
             {
                 listBox1.Items.Add("连接失败！");
                 button1.IsEnabled = true;
                 return;
             }
             NetworkStream networkStream = newClient.GetStream();
             bw = new BinaryWriter(networkStream);
             br = new BinaryReader(networkStream);
             bw.Write("Login," + username);
             Thread t1 = new Thread(ReceiveMessage);
             t1.Start();
         }
         //第一步，接收消息
         private void ReceiveMessage()
         {
             string message = "";
             while (true)
             {
                 try
                 {
                     message = br.ReadString();
                 }
                 catch
                 {
                     break;
                 }
                 string[] array = message.Split(',');
                 switch (array[])
                 {
                     case "Login":
                         AddUser(array[]);
                         break;
                     case "Logout":
                         RemoveUser(array[]);
                         break;
                     case "Talk":
                         AddMessage(array[] + ":" + array[]);
                         break;
                     default:
                         AddMessage(message);
                         break;
                 }
             }
         }
         //第二步，添加消息到textBlock
         private void AddMessage(string message)
         {
             Action act = delegate()
             {
                 listBox1.Items.Add(message);
             };
             listBox2.Dispatcher.Invoke(act);
         }
         //第三步，添加用户到列表
         private void AddUser(string name)
         {
             Action act = delegate()
             {
                 listBox2.Items.Add(name);
             };
             listBox2.Dispatcher.Invoke(act);
         }
         //第四步，移除用户
         private void RemoveUser(string name)
         {
             Action act = delegate()
             {
                 listBox2.Items.Remove(name);
             };
             listBox2.Dispatcher.Invoke(act);
         }

         private void button2_Click(object sender, RoutedEventArgs e)
         {
             NetworkStream networkStream = newClient.GetStream();
              bw = new BinaryWriter(networkStream);
             string message = textBox1.Text;
             bw.Write("Talk,"+listBox2.SelectedItem+","+message);
             listBox1.Items.Add(username + ":" + textBox1.Text);
         }
         private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
         {
             try
             {
                 bw.Write("Logout," + username);
             }
             catch
             {
                 MessageBox.Show("与服务器连接失败！");
             }
             bw.Close();
         }
     }
 }

　　我这里的ip都是我自己电脑的ip，你们参考别忘了改ip

　　我是蜀云泉,我爱许嵩.吼吼~