C#网络聊天室(共14页)

1、精选优质文档-倾情为你奉上计算机科学与信息技术学院实验报告学号：姓名： 班级：课程名称：C#网络应用编程实验名称：网络聊天程序上机实验性质： 综合性 设计性 验证实验实验时间：实验地点：实验设备：装有Microsoft Visual Studio 2008的计算机一、 实验要求将课本5.2.1的网络聊天程序加上一个广播消息功能。 二、 实验步骤 *服务器端操作*1、 创建一个名为服务器端的windows应用程序，将Form1.cs换名为MainForm.cs，设计界面如图所示。2、 在解决方案资源管理器中，添加一个名为User.cs的文件，用于保存于客户通信需要的信息，代码如下：using S

2、ystem.Net.Sockets;using System.IO;namespace SyncChatServer class User public TcpClient clientget; private set; public BinaryReader brget; private set; public BinaryWriter bwget; private set; public string userName get; set; public User(TcpClient client) this.client = client; NetworkStream networkStr

3、eam = client.GetStream(); br = new BinaryReader(networkStream); bw = new BinaryWriter(networkStream); public void Close() br.Close(); bw.Close(); client.Close(); 3、 在MainForm中添加对应的代码和事件：using System;using System.Collections.Generic;using System.Windows.Forms;/添加的命名空间引用using System.Net;using System.N

4、et.Sockets;using System.Threading;namespace SyncChatServer public partial class MainForm : Form / <summary>保存连接的所有用户</summary> private List<User> userList = new List<User>(); / <summary>使用的本机IP地址</summary> IPAddress localAddress; / <summary>监听端口</summary&

5、gt; private const int port = 22222; private TcpListener myListener; / <summary>是否正常退出所有接收线程</summary> bool isNormalExit = false; public MainForm() InitializeComponent(); listBoxStatus.HorizontalScrollbar = true; IPAddress addrIP = Dns.GetHostAddresses(Dns.GetHostName(); localAddress = ad

6、drIP0; buttonStop.Enabled = false; / <summary>【开始监听】按钮的Click事件</summary> private void buttonStart_Click(object sender, EventArgs e) myListener = new TcpListener(localAddress, port); myListener.Start(); AddItemToListBox(string.Format("开始在0:1监听客户连接", localAddress, port); /创建一个线程监

7、听客户端连接请求 Thread myThread = new Thread(ListenClientConnect); myThread.Start(); buttonStart.Enabled = false; buttonStop.Enabled = true; / <summary>接收客户端连接</summary> private void ListenClientConnect() TcpClient newClient = null; while (true) try newClient = myListener.AcceptTcpClient(); cat

8、ch /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; /每接受一个客户端连接,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); AddItemToListBox(string.Format("0进入", newClient.Client.Remot

9、eEndPoint); AddItemToListBox(string.Format("当前连接用户数：0", userList.Count); / <summary> / 处理接收的客户端数据 / </summary> / <param name="userState">客户端信息</param> private void ReceiveData(object userState) User user = (User)userState; TcpClient client = user.client; w

10、hile (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，并根据长度前缀读出字符串 receiveString = user.br.ReadString(); catch if (isNormalExit = false) AddItemToListBox(string.Format("与0失去联系，已终止接收该用户信息", client.Client.RemoteEndPoint); RemoveUser(user); break; AddItemToL

11、istBox(string.Format("来自0：1", user.client.Client.RemoteEndPoint, receiveString); string splitString = receiveString.Split(','); switch (splitString0) case "Login": user.userName = splitString1; SendToAllClient(user, receiveString); break; case "Logout": SendToAl

12、lClient(user, receiveString); RemoveUser(user); break; case "UniTalk": string unitalkString = receiveString.Substring(splitString0.Length + splitString1.Length + 2); AddItemToListBox(string.Format("0对1说：2", user.userName, splitString1, unitalkString); SendToClient(user, "uni

13、talk," + user.userName + "," + unitalkString); foreach (User target in userList) if (target.userName = splitString1 && user.userName != splitString1) SendToClient(target, "unitalk," + user.userName + "," + unitalkString); break; break; case "Brotalk&qu

14、ot;: string brotalkString = receiveString.Substring(splitString0.Length + 1); AddItemToListBox(string.Format("0说：1", user.userName, brotalkString); SendToClient(user, "brotalk," + user.userName + "," + brotalkString); SendToAllClient(user, "brotalk," + user.us

15、erName + "," + brotalkString); break; default: AddItemToListBox("什么意思啊：" + receiveString); break; / <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 v

16、oid 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(); AddItemToListBox(string.Format("向0发送：1", user.userName, message); catch AddItemToListBox(string.Format("向0发送信息失败", user.userName); / <summary>发送信息给所有客户</su

17、mmary> / <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(',')0.ToLower(); if (command = "login") for (int i = 0; i < use

18、rList.Count; i+) SendToClient(userListi, message); if (userListi.userName != user.userName) SendToClient(user, "login," + userListi.userName); else if(command="logout") for (int i = 0; i < userList.Count; i+) if (userListi.userName != user.userName) SendToClient(userListi, mes

19、sage); else if(command="brotalk") for (int i = 0; i < userList.Count; i+) if (userListi.userName != user.userName) SendToClient(userListi, message); / <summary>移除用户</summary> / <param name="user">指定要删除的用户</param> private void RemoveUser(User user) userL

20、ist.Remove(user); user.Close(); AddItemToListBox(string.Format("当前连接用户数：0", userList.Count); private delegate void AddItemToListBoxDelegate(string str); / <summary>在ListBox中追加状态信息</summary> / <param name="str">要追加的信息</param> private void AddItemToListBox(s

21、tring str) if (listBoxStatus.InvokeRequired) AddItemToListBoxDelegate d = AddItemToListBox; listBoxStatus.Invoke(d, str); else listBoxStatus.Items.Add(str); listBoxStatus.SelectedIndex = listBoxStatus.Items.Count - 1; listBoxStatus.ClearSelected(); / <summary>【停止监听】按钮的Click事件</summary> p

22、rivate void buttonStop_Click(object sender, EventArgs e) AddItemToListBox("开始停止服务，并依次使用户退出!"); isNormalExit = true; for (int i = userList.Count - 1; i >= 0; i-) RemoveUser(userListi); /通过停止监听让myListener.AcceptTcpClient()产生异常退出监听线程 myListener.Stop(); buttonStart.Enabled = true; buttonSto

23、p.Enabled = false; / <summary>关闭窗口时触发的事件</summary> private void MainForm_FormClosing(object sender, FormClosingEventArgs e) if (myListener != null) /引发buttonStop的Click事件 buttonStop.PerformClick(); *服务器端操作*4、 创建一个名为客户端举例端的windows应用程序，将Form1.cs换名为MainForm.cs，设计界面如图所示。5、 在MainForm中添加对应的代码和事

24、件：using System;using System.Windows.Forms;/添加的命名空间引用using System.Net;using System.Net.Sockets;using System.Threading;using System.IO;namespace SyncChatClient public partial class MainForm : Form private bool isExit = false; private TcpClient client; private BinaryReader br; private BinaryWriter bw;

25、public MainForm() InitializeComponent(); Random r = new Random(int)DateTime.Now.Ticks); textBoxUserName.Text = "hrf" + r.Next(100, 999); listBoxOnlineStatus.HorizontalScrollbar = true; / <summary> / 【连接服务器】按钮的Click事件 / </summary> private void buttonConnect_Click(object sender,

26、EventArgs e) buttonConnect.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 client = new TcpClient(Dns.GetHostName(), 22222); AddTalkMessage("连接成功"); catch AddTalkMessage("连接失败"); buttonConnect.Enabled = true; return; /获取网络流 NetworkStream networkStream = client.GetSt

27、ream(); /将网络流作为二进制读写对象 br = new BinaryReader(networkStream); bw = new BinaryWriter(networkStream); SendMessage("Login," + textBoxUserName.Text); Thread threadReceive = new Thread(new ThreadStart(ReceiveData); threadReceive.IsBackground = true; threadReceive.Start(); / <summary>处理接收的服

28、务器端数据</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("与服务器失去联系。"); break; string splitString= receiveString.Split(',&

29、#39;); string command = splitString0.ToLower(); switch (command) case "login": /格式：login,用户名 AddOnline(splitString1); break; case "logout": /格式：logout,用户名 RemoveUserName(splitString1); break; case "unitalk": /格式：unitalk,用户名,对话信息 /AddTalkMessage(splitString1 + "：rn&

30、quot;); /AddTalkMessage(receiveString.Substring( / splitString0.Length + splitString1.Length+2); AddTalkMessage(string.Format("0说：1", splitString1, receiveString.Substring( splitString0.Length + splitString1.Length + 2); break; case "brotalk": AddTalkMessage(string.Format("0

31、说：1", splitString1, receiveString.Substring( splitString0.Length + splitString1.Length + 2); break; default: AddTalkMessage("什么意思啊：" + receiveString); break; Application.Exit(); / <summary>向服务器端发送信息</summary> private void SendMessage(string message) try /将字符串写入网络流，此方法会自动附加

32、字符串长度前缀 bw.Write(message); bw.Flush(); catch AddTalkMessage("发送失败!"); / <summary>【发送】按钮的Click事件</summary> private void buttonSend_Click(object sender, EventArgs e) if (listBoxOnlineStatus.SelectedIndex != -1) /SendMessage("Talk," + listBoxOnlineStatus.SelectedItem + &

33、quot;," + textBoxSend.Text+"rn"); SendMessage("UniTalk," + listBoxOnlineStatus.SelectedItem + "," + textBoxSend.Text); textBoxSend.Clear(); else MessageBox.Show("没有选中一个用户，则为发送广播信息，确认发送？"); SendMessage("Brotalk," + listBoxOnlineStatus.SelectedIte

34、m + textBoxSend.Text); textBoxSend.Clear(); / <summary>关闭窗口时触发的事件</summary> private void MainForm_FormClosing(object sender, FormClosingEventArgs e) /未与服务器连接前client为null if (client != null) SendMessage("Logout," + textBoxUserName.Text); isExit = true; br.Close(); bw.Close(); cl

35、ient.Close(); / <summary>在发送信息文本框中按下【Enter】键触发的事件</summary> private void textBoxSend_KeyPress(object sender, KeyPressEventArgs e) if (e.KeyChar = (char)Keys.Return) /触发buttonSend的Click事件 buttonSend.PerformClick(); private delegate void MessageDelegate(string message); / <summary> 在

36、richTextBoxTalkInfo中追加聊天信息</summary> private void AddTalkMessage(string message) if (richTextBoxTalkInfo.InvokeRequired) MessageDelegate d = new MessageDelegate(AddTalkMessage); richTextBoxTalkInfo.Invoke(d, new object message ); else richTextBoxTalkInfo.AppendText(message + Environment.NewLine); richTextBoxTalkInfo.ScrollToCaret(); private delegate void AddOnlineDelegate(string message); / <summary> 在listBoxOnlineStatus中添加在线的其它客户端信息</summary> private void AddOnline(string userName) if (listBoxOnlineStatus.InvokeRequired) AddOnlineDelegate d = n