1 using System;
2 using System.Windows.Forms;
3 //添加的命名空间引用
4 using System.Net;
5 using System.Net.Sockets;
6 using System.Threading;
7 using System.IO;
8 namespace SyncChatClient
9 {
10 public partial class MainForm : Form
11 {
12 private bool isExit = false;
13 private TcpClient client;
14 private BinaryReader br;
15 private BinaryWriter bw;
16 public MainForm()
17 {
18 InitializeComponent();
19 Random r = new Random((int)DateTime.Now.Ticks);//？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
20 textBoxUserName.Text = "user" + r.Next(100, 999);//？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？
21 listBoxOnlineStatus.HorizontalScrollbar = true;//???????????????????????????????????????????????????????????????????????????
22
23 }
24 /// <summary>
25 /// 【连接服务器】按钮的Click事件
26 /// </summary>
27 private void buttonConnect_Click(object sender, EventArgs e)
28 {
29 buttonConnect.Enabled = false;
30 try
31 {
32 //此处为方便演示，实际使用时要将Dns.GetHostName()改为服务器域名
33 client = new TcpClient(Dns.GetHostName(), 51888);
34 //后面添加的函数，给文本框中添加信息
35 AddTalkMessage("连接成功");
36 }
37 catch
38 {
39 AddTalkMessage("连接失败");
40 buttonConnect.Enabled = true;
41 return;
42 }
43 //获取网络流
44 NetworkStream networkStream = client.GetStream();
45 //将网络流作为二进制读写对象
46 br = new BinaryReader(networkStream);
47 bw = new BinaryWriter(networkStream);
48 //向服务器端发送信息
49 SendMessage("Login," + textBoxUserName.Text);
50 Thread threadReceive = new Thread(new ThreadStart(ReceiveData));//???????????????????????????????????????????????????????
51 threadReceive.IsBackground = true;//???????????????????????????????????????????????????????????????????????????
52 threadReceive.Start();
53 }
54 /// <summary>处理接收的服务器端数据</summary>
55 private void ReceiveData()
56 {
57 string receiveString = null;
58 while (isExit == false)
59 {
60 try
61 {
62 //从网络流中读出字符串
63 //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
64 receiveString = br.ReadString();
65 }
66 catch
67 {
68 if (isExit == false)
69 {
70 MessageBox.Show("与服务器失去联系。");
71 }
72 break;
73 }
74 string[] splitString= receiveString.Split(‘,‘);
75 string command = splitString[0].ToLower();
76 switch (command)
77 {
78 case "login": //格式：login,用户名
79 AddOnline(splitString[1]);//在listBoxOnlineStatus当中添加已经登陆的用户的信息
80 break;
81 case "logout": //格式：logout,用户名
82 RemoveUserName(splitString[1]);//移除listBoxOnlineStatus当中已经离线的信息
83 break;
84 case "talk": //格式：talk,用户名,对话信息
85 //AddTalkMessage(splitString[1] + "：\r\n");
86 //AddTalkMessage(receiveString.Substring(
87 // splitString[0].Length + splitString[1].Length+2));
88 AddTalkMessage(string.Format("[{0}]说：{1}",
89 splitString[1],receiveString.Substring(
90 splitString[0].Length + splitString[1].Length + 2)));
91 break;
92 default:
93 AddTalkMessage("什么意思啊：" + receiveString);
94 break;
95 }
96 }
97 Application.Exit();
98 }
99 /// <summary>向服务器端发送信息</summary>
100 private void SendMessage(string message)
101 {
102 try
103 {
104 //将字符串写入网络流，此方法会自动附加字符串长度前缀
105 bw.Write(message);
106 bw.Flush();
107 }
108 catch
109 {
110 AddTalkMessage("发送失败!");
111 }
112 }
113 /// <summary>【发送】按钮的Click事件</summary>
114 private void buttonSend_Click(object sender, EventArgs e)
115 {
116 if (listBoxOnlineStatus.SelectedIndex != -1)
117 {
118 //SendMessage("Talk," + listBoxOnlineStatus.SelectedItem + "," + textBoxSend.Text+"\r\n");
119 SendMessage("Talk," + listBoxOnlineStatus.SelectedItem + "," + textBoxSend.Text);
120 textBoxSend.Clear();
121 }
122 else
123 {
124 MessageBox.Show("请先在[当前在线]中选择一个对话者");
125 }
126 }
127 /// <summary>关闭窗口时触发的事件</summary>
128 private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
129 {
130 //未与服务器连接前client为null
131 if (client != null)
132 {
133 SendMessage("Logout," + textBoxUserName.Text);
134 isExit = true;
135 br.Close();
136 bw.Close();
137 client.Close();
138 }
139 }
140 /// <summary>在发送信息文本框中按下【Enter】键触发的事件</summary>
141 private void textBoxSend_KeyPress(object sender, KeyPressEventArgs e)
142 {
143 if (e.KeyChar == (char)Keys.Return)
144 {
145 //触发buttonSend的Click事件
146 buttonSend.PerformClick();
147 }
148 }
149 private delegate void MessageDelegate(string message);
150 /// <summary> 在richTextBoxTalkInfo中追加聊天信息</summary>
151 private void AddTalkMessage(string message)
152 {
153 if (richTextBoxTalkInfo.InvokeRequired)
154 {
155 MessageDelegate d = new MessageDelegate(AddTalkMessage);
156 richTextBoxTalkInfo.Invoke(d, new object[] { message });//?????????????????????????????????????????????
157 }
158 else
159 {
160 richTextBoxTalkInfo.AppendText(message + Environment.NewLine);
161 richTextBoxTalkInfo.ScrollToCaret();
162 }
163 }
164 private delegate void AddOnlineDelegate(string message);
165 /// <summary> 在listBoxOnlineStatus中添加在线的其它客户端信息</summary>
166 private void AddOnline(string userName)
167 {
168 if (listBoxOnlineStatus.InvokeRequired)
169 {
170 AddOnlineDelegate d = new AddOnlineDelegate(AddOnline);
171 listBoxOnlineStatus.Invoke(d, new object[] { userName });
172 }
173 else
174 {
175 listBoxOnlineStatus.Items.Add(userName);
176 listBoxOnlineStatus.SelectedIndex = listBoxOnlineStatus.Items.Count - 1;
177 listBoxOnlineStatus.ClearSelected();
178 }
179 }
180 private delegate void RemoveUserNameDelegate(string userName);
181 /// <summary> 在listBoxOnlineStatus中移除不在线的其它客户端信息</summary>
182 private void RemoveUserName(string userName)
183 {
184 if (listBoxOnlineStatus.InvokeRequired)
185 {
186 RemoveUserNameDelegate d = RemoveUserName;
187 listBoxOnlineStatus.Invoke(d, userName);
188 }
189 else
190 {
191 listBoxOnlineStatus.Items.Remove(userName);
192 listBoxOnlineStatus.SelectedIndex = listBoxOnlineStatus.Items.Count - 1;
193 listBoxOnlineStatus.ClearSelected();
194 }
195 }
196 }
197 }
时间： 2024-11-02 21:04:01