C#编程

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Form1.cs：源码内容
							using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Text;
namespace ChatClient
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.StatusBar statusBar1;
		private System.Windows.Forms.Button btnDisconnect;
		private System.Windows.Forms.Button btnConnect;
		private System.Windows.Forms.Button btnLog;
		private System.Windows.Forms.CheckBox cbPrivate;
		private System.Windows.Forms.Button btnSend;
		private System.Windows.Forms.TextBox ChatOut;
		private System.Windows.Forms.RichTextBox rtbChatIn;
		private System.Windows.Forms.ListBox lbChatters;
		private int serverport;
		private NetworkStream ns;
		private StreamReader sr;
		private TcpClient clientsocket;
		private Thread receive = null;
		private string serveraddress;
		private string clientname;
		private bool connected = false;
		private bool logging = false;
		private bool privatemode = false;
		private StreamWriter logwriter;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;
		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
			serverport = 5555;
			btnDisconnect.Enabled = false;
			btnSend.Enabled = false;
		}
		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.ChatOut = new System.Windows.Forms.TextBox();
			this.btnConnect = new System.Windows.Forms.Button();
			this.btnDisconnect = new System.Windows.Forms.Button();
			this.btnLog = new System.Windows.Forms.Button();
			this.cbPrivate = new System.Windows.Forms.CheckBox();
			this.btnSend = new System.Windows.Forms.Button();
			this.statusBar1 = new System.Windows.Forms.StatusBar();
			this.lbChatters = new System.Windows.Forms.ListBox();
			this.rtbChatIn = new System.Windows.Forms.RichTextBox();
			this.SuspendLayout();
			// 
			// ChatOut
			// 
			this.ChatOut.Location = new System.Drawing.Point(168, 296);
			this.ChatOut.Name = "ChatOut";
			this.ChatOut.Size = new System.Drawing.Size(248, 21);
			this.ChatOut.TabIndex = 2;
			this.ChatOut.Text = "";
			// 
			// btnConnect
			// 
			this.btnConnect.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.btnConnect.Location = new System.Drawing.Point(40, 192);
			this.btnConnect.Name = "btnConnect";
			this.btnConnect.Size = new System.Drawing.Size(75, 24);
			this.btnConnect.TabIndex = 3;
			this.btnConnect.Text = "连接";
			this.btnConnect.MouseUp += new System.Windows.Forms.MouseEventHandler(this.btnConnect_MouseUp);
			// 
			// btnDisconnect
			// 
			this.btnDisconnect.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.btnDisconnect.Location = new System.Drawing.Point(40, 224);
			this.btnDisconnect.Name = "btnDisconnect";
			this.btnDisconnect.Size = new System.Drawing.Size(75, 24);
			this.btnDisconnect.TabIndex = 4;
			this.btnDisconnect.Text = "断开连接";
			this.btnDisconnect.MouseUp += new System.Windows.Forms.MouseEventHandler(this.btnDisconnect_MouseUp);
			// 
			// btnLog
			// 
			this.btnLog.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.btnLog.Location = new System.Drawing.Point(40, 256);
			this.btnLog.Name = "btnLog";
			this.btnLog.Size = new System.Drawing.Size(75, 24);
			this.btnLog.TabIndex = 5;
			this.btnLog.Text = "开始记录";
			this.btnLog.MouseUp += new System.Windows.Forms.MouseEventHandler(this.btnLog_MouseUp);
			// 
			// cbPrivate
			// 
			this.cbPrivate.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.cbPrivate.Location = new System.Drawing.Point(48, 288);
			this.cbPrivate.Name = "cbPrivate";
			this.cbPrivate.Size = new System.Drawing.Size(64, 32);
			this.cbPrivate.TabIndex = 6;
			this.cbPrivate.Text = "悄悄话";
			this.cbPrivate.CheckedChanged += new System.EventHandler(this.cbPrivate_CheckedChanged);
			// 
			// btnSend
			// 
			this.btnSend.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.btnSend.Location = new System.Drawing.Point(432, 296);
			this.btnSend.Name = "btnSend";
			this.btnSend.Size = new System.Drawing.Size(48, 24);
			this.btnSend.TabIndex = 7;
			this.btnSend.Text = "发送";
			this.btnSend.MouseUp += new System.Windows.Forms.MouseEventHandler(this.btnSend_MouseUp);
			// 
			// statusBar1
			// 
			this.statusBar1.Location = new System.Drawing.Point(0, 335);
			this.statusBar1.Name = "statusBar1";
			this.statusBar1.Size = new System.Drawing.Size(496, 22);
			this.statusBar1.TabIndex = 8;
			// 
			// lbChatters
			// 
			this.lbChatters.ItemHeight = 12;
			this.lbChatters.Location = new System.Drawing.Point(16, 32);
			this.lbChatters.Name = "lbChatters";
			this.lbChatters.Size = new System.Drawing.Size(128, 148);
			this.lbChatters.TabIndex = 0;
			// 
			// rtbChatIn
			// 
			this.rtbChatIn.Location = new System.Drawing.Point(168, 32);
			this.rtbChatIn.Name = "rtbChatIn";
			this.rtbChatIn.Size = new System.Drawing.Size(312, 248);
			this.rtbChatIn.TabIndex = 1;
			this.rtbChatIn.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(496, 357);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.rtbChatIn,
																		  this.lbChatters,
																		  this.statusBar1,
																		  this.btnSend,
																		  this.cbPrivate,
																		  this.btnLog,
																		  this.btnDisconnect,
																		  this.btnConnect,
																		  this.ChatOut});
			this.Name = "Form1";
			this.Text = "客户端";
			this.ResumeLayout(false);
		}
		#endregion
		private void EstablishConnection()
		{
			statusBar1.Text = "正在连接到服务器";
			try 
			{
				clientsocket = new TcpClient(serveraddress,serverport);
				ns = clientsocket.GetStream();
				sr = new StreamReader(ns);
				connected = true;
			}
			catch (Exception)
			{
				MessageBox.Show("不能连接到服务器！","错误",
					MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
				statusBar1.Text = "已断开连接";
			}
		}
		private void RegisterWithServer()
		{
			try 
			{
				string command = "CONN|" + ChatOut.Text;
				Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(command.ToCharArray());
				ns.Write(outbytes,0,outbytes.Length);
				
				string serverresponse = sr.ReadLine();
				serverresponse.Trim();
				string[] tokens = serverresponse.Split(new Char[]{'|'});
				if(tokens[0] == "LIST")
				{
					statusBar1.Text = "已连接";
					btnDisconnect.Enabled = true;
				}
				for(int n=1; n<tokens.Length-1; n++)
					lbChatters.Items.Add(tokens[n].Trim(new char[]{'r','n'}));
				this.Text = clientname + "：已连接到服务器";
				
			}
			catch (Exception)
			{
				MessageBox.Show("注册时发生错误！","错误",
					MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
			}
		}
		
		private void ReceiveChat()
		{
			bool keepalive = true;
			while (keepalive) 
			{
				try
				{
					Byte[] buffer = new Byte[2048];
					ns.Read(buffer,0,buffer.Length);
					string chatter = System.Text.Encoding.ASCII.GetString(buffer);
					string[] tokens = chatter.Split(new Char[]{'|'});
					if (tokens[0] == "CHAT")
					{
						rtbChatIn.AppendText(tokens[1]);
						if(logging)
							logwriter.WriteLine(tokens[1]);
					}
					if (tokens[0] == "PRIV") 
					{
						rtbChatIn.AppendText("Private from ");
						rtbChatIn.AppendText(tokens[1].Trim() );
						rtbChatIn.AppendText(tokens[2] + "rn");
						if(logging)
						{
							logwriter.Write("Private from ");
							logwriter.Write(tokens[1].Trim() );
							logwriter.WriteLine(tokens[2] + "rn");
						}
					}
					if (tokens[0] == "JOIN")
					{
						rtbChatIn.AppendText(tokens[1].Trim() );
						rtbChatIn.AppendText(" has joined the Chatrn");
						if(logging)
						{
							logwriter.WriteLine(tokens[1]+" has joined the Chat");
						}
						string newguy = tokens[1].Trim(new char[]{'r','n'});
						lbChatters.Items.Add(newguy);
					}
					if (tokens[0] == "GONE")
					{
						rtbChatIn.AppendText(tokens[1].Trim() );
						rtbChatIn.AppendText(" has left the Chatrn");
						if(logging)
						{
							logwriter.WriteLine(tokens[1]+" has left the Chat");
						}
						lbChatters.Items.Remove(tokens[1].Trim(new char[]{'r','n'}));
					}
					if (tokens[0] == "QUIT")
					{
						ns.Close();
						clientsocket.Close();
						keepalive = false;
						statusBar1.Text = "服务器端已停止";
						connected= false;
						btnSend.Enabled = false;
						btnDisconnect.Enabled = false;
					}
				}
				catch(Exception){}
			}
		}
		private void QuitChat() 
		{
			if(connected) 
			{
				try
				{
					string command = "GONE|" + clientname;
					Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(command.ToCharArray());
					ns.Write(outbytes,0,outbytes.Length);
					clientsocket.Close();
				}
				catch(Exception)
				{
				}
			}
			if(logging)
				logwriter.Close();
			if(receive != null && receive.IsAlive)
				receive.Abort();
			this.Text = "客户端";
			
		}
		private void StartStopLogging() 
		{
			if(!logging)
			{
				if(!Directory.Exists("logs"))
					Directory.CreateDirectory("logs");
				string fname = "logs\" + DateTime.Now.ToString("ddMMyyHHmm") + ".txt";
				logwriter = new StreamWriter(new FileStream(fname, FileMode.OpenOrCreate,
					FileAccess.Write));
				logging = true;
				btnLog.Text = "停止记录";
				statusBar1.Text = "已连接上并记录";
			}
			else
			{
				logwriter.Close();
				logging = false;
				btnLog.Text = "开始记录";
				statusBar1.Text = "已连接上但不记录";
			}
		}
		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main(String[] args) 
		{
			Form1 cf = new Form1();
			if(args.Length == 0)
				cf.serveraddress = "localhost";
			else
				cf.serveraddress = args[0];
			Application.Run(cf);
		}
		private void btnConnect_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(ChatOut.Text == "")
			{
				MessageBox.Show("连接前请在消息发送框中写上你的大名！","错误",
					MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
				return;
			}
			else
				clientname = ChatOut.Text;
			
			EstablishConnection();
			
			if(connected)
			{
				RegisterWithServer();
				receive = new Thread(new ThreadStart(ReceiveChat));
				receive.Start();
				btnSend.Enabled = true;
				btnConnect.Enabled = false;
				ChatOut.Text = "";
			}
		}
		private void btnDisconnect_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			QuitChat();
			btnDisconnect.Enabled = false;
			btnConnect.Enabled = true;
			btnSend.Enabled = false;
			ns.Close();
			clientsocket.Close();
			receive.Abort();
			connected = false;
			lbChatters.Items.Clear();
			statusBar1.Text = "已断开连接";
		}
		private void btnLog_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			StartStopLogging();
		}
		private void btnSend_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			try
			{
				if(!privatemode)
				{
					string pubcommand = "CHAT|" + clientname +": "+ChatOut.Text + "rn";
					Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(pubcommand.ToCharArray());
					ns.Write(outbytes,0,outbytes.Length);
					ChatOut.Text = "";
				}
				else
				{
					if(lbChatters.SelectedIndex == -1)
					{
						MessageBox.Show("请从列表中选择一个对象！","错误",
							MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
						return;
					}
					string destclient = lbChatters.SelectedItem.ToString();
					string command = "PRIV|" + clientname + "|: " + ChatOut.Text + "|" + destclient;
					Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(command.ToCharArray());
					ns.Write(outbytes,0,outbytes.Length);
					ChatOut.Text = "";
				}
			}
			catch(Exception)
			{
				MessageBox.Show("到服务器的连接丢失！","错误",
					MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
				ns.Close();
				clientsocket.Close();
				if(receive != null && receive.IsAlive)
					receive.Abort();
				connected = false;
				statusBar1.Text = "已断开连接";
			}
		}
		private void cbPrivate_CheckedChanged(object sender, System.EventArgs e)
		{
			if(cbPrivate.Checked)
			{
				privatemode = true;
				lbChatters.SelectionMode = System.Windows.Forms.SelectionMode.One;
			}
			else
			{
				privatemode = false;
				lbChatters.SelectionMode = System.Windows.Forms.SelectionMode.None;
			}
		}
	}
}

						