socket学习之聊天室
服务端
- using System;
- using System.Collections.Generic;
- using System.ComponentModel;
- using System.Data;
- using System.Drawing;
- using System.IO;
- using System.Net;
- using System.Net.Sockets;
- using System.Text;
- using System.Threading;
- using System.Windows.Forms;
- namespace SocketServer
- {
- public partial class Form1 : Form
- {
- /// <summary>
- /// 保存连接的所有用户
- /// </summary>
- private List<User> userList = new List<User>();
- /// <summary>
- /// 服务器IP地址
- /// </summary>;
- private string ServerIP;
- /// <summary>
- /// 监听端口
- /// </summary>
- private int port;
- private TcpListener myListener;
- /// <summary>
- /// 是否正常退出所有接收线程
- /// </summary>
- bool isNormalExit = false;
- public Form1()
- {
- InitializeComponent();
- btn_Stop.Enabled = false;
- 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()
- {
- FileStream fs = new FileStream("ServerIPAndPort.txt", FileMode.Open);
- StreamReader sr = new StreamReader(fs);
- string IPAndPort = sr.ReadLine();
- ServerIP = IPAndPort.Split(':')[]; //设定IP
- port = int.Parse(IPAndPort.Split(':')[]); //设定端口
- sr.Close();
- fs.Close();
- }
- /// <summary>
- /// 开始监听
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void btn_Start_Click(object sender, EventArgs e)
- {
- ListenClient();
- }
- /// <summary>
- /// 开始服务,监听客户端
- /// </summary>
- private void ListenClient()
- {
- myListener = new TcpListener(IPAddress.Parse(ServerIP), port);
- myListener.Start();
- AddTalkMessage(string.Format("开始在{0}:{1}监听客户连接", ServerIP, port));
- //创建一个线程监客户端连接请求
- Thread myThread = new Thread(ListenClientConnect);
- myThread.Start();
- btn_Start.Enabled = false;
- btn_Stop.Enabled = true;
- }
- /// <summary>
- /// 接收客户端连接
- /// </summary>
- private void ListenClientConnect()
- {
- TcpClient newClient = null;
- while (true)
- {
- try
- {
- newClient = myListener.AcceptTcpClient();
- }
- 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;
- }
- //每接收一个客户端连接,就创建一个对应的线程循环接收该客户端发来的信息;
- User user = new User(newClient);
- Thread threadReceive = new Thread(ReceiveData);
- threadReceive.Start(user);
- userList.Add(user);
- AddTalkMessage(string.Format("[{0}]进入", newClient.Client.RemoteEndPoint));
- AddTalkMessage(string.Format("当前连接用户数:{0}", userList.Count));
- }
- }
- /// <summary>
- /// 处理接收的客户端信息
- /// </summary>
- /// <param name="userState">客户端信息</param>
- private void ReceiveData(object userState)
- {
- User user = (User)userState;
- TcpClient client = user.client;
- while (isNormalExit == false)
- {
- string receiveString = null;
- try
- {
- //从网络流中读出字符串,此方法会自动判断字符串长度前缀
- receiveString = user.br.ReadString();
- }
- catch (Exception)
- {
- if (isNormalExit == false)
- {
- AddTalkMessage(string.Format("与[{0}]失去联系,已终止接收该用户信息", client.Client.RemoteEndPoint));
- RemoveUser(user);
- }
- break;
- }
- AddTalkMessage(string.Format("来自[{0}]:{1}", user.client.Client.RemoteEndPoint, receiveString));
- string[] splitString = receiveString.Split(',');
- switch (splitString[])
- {
- case "Login":
- user.userName = splitString[];
- SendToAllClient(user, receiveString);
- break;
- case "Logout":
- SendToAllClient(user, receiveString);
- RemoveUser(user);
- return;
- case "AllTalk":
- string allTalkString = receiveString.Substring(splitString[].Length + splitString[].Length + );
- AddTalkMessage(string.Format("{0}说:{1}", user.userName, allTalkString));
- for (int i = ; i < userList.Count; i++)
- {
- SendToClient(userList[i], "talk," + user.userName + "," + allTalkString);
- }
- break;
- case "Talk":
- string talkString = receiveString.Substring(splitString[].Length + splitString[].Length + );
- AddTalkMessage(string.Format("{0}对{1}说:{2}", user.userName, splitString[], talkString));
- SendToClient(user, "talk," + "你对"+ splitString[] + "说," + talkString);//发给自己
- foreach (User target in userList)//发给对方
- {
- if (target.userName == splitString[] && user.userName != splitString[])
- {
- SendToClient(target, "talk," + user.userName + "对你说," + talkString);
- break;
- }
- }
- break;
- default:
- AddTalkMessage("错误:" + receiveString);
- break;
- }
- }
- }
- /// <summary>
- /// 发送消息给所有客户
- /// </summary>
- /// <param name="user">指定发给哪个用户</param>
- /// <param name="message">信息内容</param>
- private void SendToAllClient(User user, string message)
- {
- string command = message.Split(',')[].ToLower();
- if (command == "login")
- {
- //获取所有客户端在线信息到当前登录用户
- for (int i = ; i < userList.Count; i++)
- {
- SendToClient(user, "login," + userList[i].userName);
- }
- //把自己上线,发送给所有客户端
- for (int i = ; i < userList.Count; i++)
- {
- if (user.userName != userList[i].userName)
- {
- SendToClient(userList[i], "login," + user.userName);
- SendToClient(userList[i], "talk,服务器:" + user.userName + "已上线,");
- }
- }
- }
- else if (command == "logout")
- {
- for (int i = ; i < userList.Count; i++)
- {
- if (userList[i].userName != user.userName)
- {
- SendToClient(userList[i], message);
- SendToClient(userList[i], "talk,服务器:" + user.userName + "已下线,");
- }
- }
- }
- }
- /// <summary>
- /// 发送 message 给 user
- /// </summary>
- /// <param name="user">指定发给哪个用户</param>
- /// <param name="message">信息内容</param>
- private void SendToClient(User user, string message)
- {
- try
- {
- //将字符串写入网络流,此方法会自动附加字符串长度前缀
- user.bw.Write(message);
- user.bw.Flush();
- AddTalkMessage(string.Format("向[{0}]发送:{1}", user.userName, message));
- }
- catch
- {
- AddTalkMessage(string.Format("向[{0}]发送信息失败", user.userName));
- }
- }
- /// <summary>
- /// 移除用户
- /// </summary>
- /// <param name="user">指定要移除的用户</param>
- private void RemoveUser(User user)
- {
- userList.Remove(user);
- user.Close();
- AddTalkMessage(string.Format("当前连接用户数:{0}", userList.Count));
- }
- private delegate void AddTalkMessageDelegate(string message);
- /// <summary>
- /// 在聊天对话框(txt_Message)中追加聊天信息
- /// </summary>
- /// <param name="str">要追加的信息</param>
- private void AddTalkMessage(string message)
- {
- if (txt_Message.InvokeRequired)
- {
- AddTalkMessageDelegate d = new AddTalkMessageDelegate(AddTalkMessage);
- txt_Message.Invoke(d, new object[] { message });
- }
- else
- {
- txt_Message.AppendText(message + Environment.NewLine);
- txt_Message.ScrollToCaret();
- }
- }
- /// <summary>
- /// 停止监听
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void btn_Stop_Click(object sender, EventArgs e)
- {
- stopListen();
- }
- private void stopListen()
- {
- AddTalkMessage("开始停止服务,并依次使用户退出!");
- isNormalExit = true;
- for (int i = userList.Count - ; i >= ; i--)
- {
- RemoveUser(userList[i]);
- }
- //通过停止监听让 myListener.AcceptTcpClient() 产生异常退出监听线程
- myListener.Stop();
- btn_Start.Enabled = true;
- btn_Stop.Enabled = false;
- }
- private void Form1_FormClosing(object sender, FormClosingEventArgs e)
- {
- if (myListener != null)
- stopListen();//btn_Stop.PerformClick(); //引发 btn_Stop 的Click事件
- }
- private void btn_send_Click(object sender, EventArgs e)
- {
- for (int i = ; i < userList.Count; i++)
- {
- SendToClient(userList[i], "talk,服务器," + talk.Text + "\r\n");
- }
- talk.Clear();
- }
- private void talk_KeyPress(object sender, KeyPressEventArgs e)
- {
- if (e.KeyChar == (char)Keys.Return)
- {
- //触发【发送】按钮的单击事件
- btn_send.PerformClick();
- }
- }
- }
- }
- using System;
- using System.Collections.Generic;
- using System.Text;
- using System.Net.Sockets;
- using System.IO;
- namespace SocketServer
- {
- class User
- {
- public TcpClient client { get; private set; }
- public BinaryReader br { get; private set; }
- public BinaryWriter bw { get; private set; }
- public string userName { get; set; }
- public User(TcpClient client)
- {
- this.client = client;
- NetworkStream networkStream = client.GetStream();
- br = new BinaryReader(networkStream);
- bw = new BinaryWriter(networkStream);
- }
- public void Close()
- {
- br.Close();
- bw.Close();
- client.Close();
- }
- }
- }
客户端
- using System;
- using System.Collections.Generic;
- using System.ComponentModel;
- using System.Data;
- using System.Drawing;
- using System.IO;
- using System.Net;
- using System.Net.Sockets;
- using System.Text;
- using System.Threading;
- using System.Windows.Forms;
- namespace SocketClient
- {
- public partial class Form1 : Form
- {
- private string ServerIP; //IP
- private int port; //端口
- private bool isExit = false;
- private TcpClient client;
- private BinaryReader br;
- private BinaryWriter bw;
- public Form1()
- {
- InitializeComponent();
- Random r = new Random((int)DateTime.Now.Ticks);
- txt_UserName.Text = "user" + r.Next(, );
- lst_OnlineUser.HorizontalScrollbar = true;
- lst_OnlineUser.Items.Add("所有人");
- lst_OnlineUser.SelectedIndex = ;
- 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(':')[]; //设定IP
- port = int.Parse(IPAndPort.Split(':')[]); //设定端口
- 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>
- /// 打开客户端,即连接服务器
- /// </summary>
- private void ConnectServer()
- {
- btn_Login.Enabled = false;
- try
- {
- //此处为方便演示,实际使用时要将Dns.GetHostName()改为服务器域名
- //IPAddress ipAd = IPAddress.Parse("182.150.193.7");
- client = new TcpClient();
- client.Connect(IPAddress.Parse(ServerIP), port);
- AddTalkMessage("连接成功\r\n");
- }
- catch (Exception ex)
- {
- AddTalkMessage("连接失败,原因:" + ex.Message + "\r\n");
- btn_Login.Enabled = true;
- return;
- }
- //获取网络流
- NetworkStream networkStream = client.GetStream();
- //将网络流作为二进制读写对象
- br = new BinaryReader(networkStream);
- bw = new BinaryWriter(networkStream);
- SendMessage("Login," + txt_UserName.Text);
- Thread threadReceive = new Thread(new ThreadStart(ReceiveData));
- threadReceive.IsBackground = true;
- threadReceive.Start();
- }
- /// <summary>
- /// 【登陆】按钮事件
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void btn_Login_Click(object sender, EventArgs e)
- {
- ConnectServer();
- }
- /// <summary>
- /// 处理服务器信息
- /// </summary>
- private void ReceiveData()
- {
- string receiveString = null;
- while (isExit == false)
- {
- try
- {
- //从网络流中读出字符串
- //此方法会自动判断字符串长度前缀,并根据长度前缀读出字符串
- receiveString = br.ReadString();
- }
- catch
- {
- if (isExit == false)
- {
- MessageBox.Show("与服务器失去连接");
- }
- break;
- }
- string[] splitString = receiveString.Split(',');
- string command = splitString[].ToLower();
- switch (command)
- {
- case "login": //格式: login,用户名
- AddOnline(splitString[]);
- break;
- case "logout": //格式: logout,用户名
- RemoveUserName(splitString[]);
- break;
- case "talk": //格式: talk,用户名,对话信息
- AddTalkMessage(splitString[] + ":\r\n");
- AddTalkMessage(receiveString.Substring(splitString[].Length + splitString[].Length + ) + "\r\n");
- break;
- default:
- AddTalkMessage("错误:" + receiveString + "\r\n");
- break;
- }
- }
- Application.Exit();
- }
- /// <summary>
- /// 向服务端发送消息
- /// </summary>
- /// <param name="message"></param>
- private void SendMessage(string message)
- {
- try
- {
- //将字符串写入网络流,此方法会自动附加字符串长度前缀
- bw.Write(message);
- bw.Flush();
- }
- catch
- {
- AddTalkMessage("发送失败\r\n");
- }
- }
- private delegate void AddTalkMessageDelegate(string message);
- /// <summary>
- /// 在聊天对话框(txt_Message)中追加聊天信息
- /// </summary>
- /// <param name="message"></param>
- private void AddTalkMessage(string message)
- {
- if (txt_Message.InvokeRequired)
- {
- AddTalkMessageDelegate d = new AddTalkMessageDelegate(AddTalkMessage);
- txt_Message.Invoke(d, new object[] { message });
- }
- else
- {
- txt_Message.AppendText(message);
- txt_Message.ScrollToCaret();
- }
- }
- private delegate void AddOnlineDelegate(string message);
- /// <summary>
- /// 在在线框(lst_Online)中添加其他客户端信息
- /// </summary>
- /// <param name="userName"></param>
- private void AddOnline(string userName)
- {
- if (lst_OnlineUser.InvokeRequired)
- {
- AddOnlineDelegate d = new AddOnlineDelegate(AddOnline);
- lst_OnlineUser.Invoke(d, new object[] { userName });
- }
- else
- {
- lst_OnlineUser.Items.Add(userName);
- lst_OnlineUser.SelectedIndex = lst_OnlineUser.Items.Count - ;
- lst_OnlineUser.ClearSelected();
- }
- }
- private delegate void RemoveUserNameDelegate(string userName);
- /// <summary>
- /// 在在线框(lst_Online)中移除不在线的客户端信息
- /// </summary>
- /// <param name="userName"></param>
- private void RemoveUserName(string userName)
- {
- if (lst_OnlineUser.InvokeRequired)
- {
- RemoveUserNameDelegate d = new RemoveUserNameDelegate(RemoveUserName);
- lst_OnlineUser.Invoke(d, userName);
- }
- else
- {
- lst_OnlineUser.Items.Remove(userName);
- lst_OnlineUser.SelectedIndex = lst_OnlineUser.Items.Count - ;
- lst_OnlineUser.ClearSelected();
- }
- }
- /// <summary>
- /// 【发送】按钮单击事件
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void btn_Send_Click(object sender, EventArgs e)
- {
- if (txt_SendText.Text == "")
- {
- MessageBox.Show("发送不能为空!");
- return;
- }
- if (lst_OnlineUser.Text == "所有人" || lst_OnlineUser.Text == "")
- {
- SendMessage("AllTalk,all," + txt_SendText.Text + "\r\n");
- }
- else
- {
- SendMessage("Talk," + lst_OnlineUser.SelectedItem + "," + txt_SendText.Text + "\r\n");
- }
- txt_SendText.Clear();
- }
- /// <summary>
- /// 在发送信息的文本框中按下【Enter】键触发的事件
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void txt_SendText_KeyPress(object sender, KeyPressEventArgs e)
- {
- if (e.KeyChar == (char)Keys.Return)
- {
- txt_SendText.Text = txt_SendText.Text.Substring(, txt_SendText.Text.Length - );
- //触发【发送】按钮的单击事件
- btn_Send.PerformClick();
- }
- }
- /// <summary>
- /// 窗体关闭事件
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void Form1_FormClosing(object sender, FormClosingEventArgs e)
- {
- //未与服务器连接前 client 为 null
- if (client != null)
- {
- try
- {
- SendMessage("Logout," + txt_UserName.Text);
- isExit = true;
- br.Close();
- bw.Close();
- client.Close();
- }
- catch
- {
- }
- }
- }
- }
- }
实现效果:
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