form1.cs

Java聊天室基于C/S模式的简单的聊天室系统

/**********************************************
 * 聊天室服务器（教学示例程序）
 * -------------------------------------------
 * 作者：孙继磊
 * 日期：2006-12-4
 * -------------------------------------------
 * 作者保留本软件所有版权。All rights reserved.
 * 你可以免费复制、传播、修改本软件，但要保留本版权信息。
 * -------------------------------------------
 * 修改纪录
 * 
 * ********************************************/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;  //imports namespace
using System.Net.Sockets; //imports namespace
using System.Threading;

namespace ChatServer
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{

		#region 自定义的变量
		private Socket server;		//监听socket
		private Socket workSocket;  //与客户建立连接的socket
		private const int PORT=5678;//监听端口	
		private ArrayList clients;  //客户列表		
		private bool listening=false;
		//private bool connected=false;
		#endregion

		#region DotNet 自动生成的代码
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem2;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.MenuItem menuItem5;
		private System.Windows.Forms.MenuItem menuItem6;
		private System.Windows.Forms.MenuItem menuItem7;
		private System.Windows.Forms.MenuItem menuItem8;
		private System.Windows.Forms.MenuItem menuItem9;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.ListBox history;
		private System.Windows.Forms.TextBox message;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.StatusBar statusBar1;
		private System.Windows.Forms.StatusBarPanel listeningPanel;
		private System.Windows.Forms.StatusBarPanel connectedPanel;
		private System.Windows.Forms.StatusBarPanel startTimePanel;
		/// <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
			//
		}

		/// <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 );
		}
		#endregion

		#region Windows 窗体设计器生成的代码
		/// <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.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.menuItem8 = new System.Windows.Forms.MenuItem();
			this.menuItem9 = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem6 = new System.Windows.Forms.MenuItem();
			this.menuItem7 = new System.Windows.Forms.MenuItem();
			this.history = new System.Windows.Forms.ListBox();
			this.label1 = new System.Windows.Forms.Label();
			this.message = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.label2 = new System.Windows.Forms.Label();
			this.statusBar1 = new System.Windows.Forms.StatusBar();
			this.listeningPanel = new System.Windows.Forms.StatusBarPanel();
			this.connectedPanel = new System.Windows.Forms.StatusBarPanel();
			this.startTimePanel = new System.Windows.Forms.StatusBarPanel();
			((System.ComponentModel.ISupportInitialize)(this.listeningPanel)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.connectedPanel)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.startTimePanel)).BeginInit();
			this.SuspendLayout();
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1,
																					  this.menuItem5});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem2,
																					  this.menuItem3,
																					  this.menuItem4,
																					  this.menuItem8,
																					  this.menuItem9});
			this.menuItem1.Text = "Server";
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 0;
			this.menuItem2.Text = "Start";
			this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 1;
			this.menuItem3.Text = "Accept";
			this.menuItem3.Visible = false;
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 2;
			this.menuItem4.Text = "Stop";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// menuItem8
			// 
			this.menuItem8.Index = 3;
			this.menuItem8.Text = "-";
			// 
			// menuItem9
			// 
			this.menuItem9.Index = 4;
			this.menuItem9.Text = "Exit";
			this.menuItem9.Click += new System.EventHandler(this.menuItem9_Click);
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 1;
			this.menuItem5.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem6,
																					  this.menuItem7});
			this.menuItem5.Text = "Message";
			this.menuItem5.Visible = false;
			// 
			// menuItem6
			// 
			this.menuItem6.Index = 0;
			this.menuItem6.Text = "Receive";
			// 
			// menuItem7
			// 
			this.menuItem7.Index = 1;
			this.menuItem7.Text = "Send";
			// 
			// history
			// 
			this.history.ItemHeight = 12;
			this.history.Location = new System.Drawing.Point(8, 0);
			this.history.Name = "history";
			this.history.Size = new System.Drawing.Size(656, 460);
			this.history.TabIndex = 0;
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 480);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 1;
			this.label1.Text = "Message";
			// 
			// message
			// 
			this.message.Location = new System.Drawing.Point(72, 480);
			this.message.Name = "message";
			this.message.Size = new System.Drawing.Size(496, 21);
			this.message.TabIndex = 2;
			this.message.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(584, 480);
			this.button1.Name = "button1";
			this.button1.TabIndex = 3;
			this.button1.Text = "Send";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 480);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(56, 23);
			this.label2.TabIndex = 1;
			this.label2.Text = "Message";
			// 
			// statusBar1
			// 
			this.statusBar1.Location = new System.Drawing.Point(0, 515);
			this.statusBar1.Name = "statusBar1";
			this.statusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {
																						  this.listeningPanel,
																						  this.connectedPanel,
																						  this.startTimePanel});
			this.statusBar1.ShowPanels = true;
			this.statusBar1.Size = new System.Drawing.Size(672, 22);
			this.statusBar1.TabIndex = 4;
			// 
			// listeningPanel
			// 
			this.listeningPanel.Text = "Closed";
			// 
			// connectedPanel
			// 
			this.connectedPanel.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Contents;
			this.connectedPanel.Width = 10;
			// 
			// startTimePanel
			// 
			this.startTimePanel.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Contents;
			this.startTimePanel.Text = "Server started at:";
			this.startTimePanel.Width = 126;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(672, 537);
			this.Controls.Add(this.statusBar1);
			this.Controls.Add(this.message);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.history);
			this.Controls.Add(this.label2);
			this.Menu = this.mainMenu1;
			this.Name = "Form1";
			this.Text = "Chat Server";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.listeningPanel)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.connectedPanel)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.startTimePanel)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		/// <summary>
		/// 初始化
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void Form1_Load(object sender, System.EventArgs e)
		{
			updateUI();
			clients=new ArrayList();
		}
	
		private void menuItem2_Click(object sender, System.EventArgs e)
		{
			startServer();
		}

		/// <summary>
		/// 启动服务器监听socket，并启动accept线程
		/// </summary>
		private void startServer()
		{
			if(server==null)
			{
				server=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.IP);
			}
			IPEndPoint local=new IPEndPoint(IPAddress.Parse("10.3.3.10"),5678);
			server.Bind(local);
			server.Listen(1);
			history.Items.Add("System : Start listening ...");
			statusBar1.Panels[0].Text="Listening...";
			statusBar1.Panels[2].Text=string.Format("Server started at "+DateTime.Now.ToLocalTime());
			listening=true;
			updateUI();
			ThreadStart ts=new ThreadStart(this.acceptSockets);
			Thread thread=new Thread(ts);
			thread.Start();
		}

		/// <summary>
		/// 发送（广播）数据
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void button1_Click(object sender, System.EventArgs e)
		{
			if(message.Text.Trim()=="")
				return;
			byte[] buffer=System.Text.Encoding.ASCII.GetBytes(message.Text);			
			broadcast(buffer,buffer.Length);
			history.Items.Add("System :"+message.Text);
		}

		/// <summary>
		/// "Exit"菜单项
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void menuItem9_Click(object sender, System.EventArgs e)
		{
			stopServer();
			this.Close();
		}

		/// <summary>
		/// "Stop"菜单项
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void menuItem4_Click(object sender, System.EventArgs e)
		{		
			stopServer();
			history.Items.Add("System : The server has been shut down.");
			statusBar1.Panels[0].Text="Closed";
			statusBar1.Panels[1].Text="";
			statusBar1.Panels[2].Text="";
			listening=false;			
			updateUI();
		}

		/// <summary>
		/// 刷新用户界面元素
		/// </summary>
		private void updateUI()
		{
			button1.Enabled=(clients.Count>0);
			menuItem2.Enabled=!listening;			
			menuItem4.Enabled=listening;
			statusBar1.Panels[1].Text=string.Format("{0} clients have connected to the server",clients.Count);
			//menuItem3.Enabled=!connected && listening;
			//menuItem6.Enabled=connected;
			//menuItem7.Enabled=connected;
			
		}


		/// <summary>
		///	窗体关闭前，先停止服务器
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			stopServer();
		}

		/// <summary>
		/// 停止服务器，关闭所有socket
		/// </summary>
		private void stopServer()
		{
			if(listening)
			{
				server.Shutdown(SocketShutdown.Both);				
				server.Close();	
				listening=false;
			}
			foreach(object obj in clients)
			{
				clients.Remove(obj);
				Socket sock=(Socket)obj;
				sock.Shutdown(SocketShutdown.Both);
				sock.Close();
			}
		}
	
		/// <summary>
		/// 接收数据线程代码
		/// </summary>
		private void receiveData()
		{
			byte[] buffer=new byte[1024];		
			Socket sock=workSocket;		
			while(true)
			{
				int size=sock.Receive(buffer);
				if (size==0)
				{				
					sock.Shutdown(SocketShutdown.Both);
					sock.Close();
					clients.Remove(sock);
					break;					
				}
				broadcast(buffer,size);				
				string txt=System.Text.Encoding.Unicode.GetString(buffer,0,size);//convert byte[] to string
				history.Items.Add(txt);				
			}		
		}

		/// <summary>
		/// 数据广播到所有客户端
		/// </summary>
		/// <param name="buffer"></param>
		/// <param name="length"></param>
		private void broadcast(byte[] buffer,  int length)
		{
			foreach (object client in clients)
			{
				Socket s=(Socket)client;
				int n=s.Send(buffer,0,length,SocketFlags.None);
			}			
		}

		/// <summary>
		/// 接受连接请求线程代码
		/// </summary>
		private void acceptSockets()
		{
			while(listening)
			{
				workSocket=server.Accept();
				clients.Add(workSocket);
				history.Items.Add("System : Accept a new connection request ...");				
				ThreadStart ts=new ThreadStart(this.receiveData);
				Thread thread=new Thread(ts);
				thread.Start();
				updateUI();				
			}
		}

		#region 删除的无用代码
		//
		//		private void menuItem3_Click(object sender, System.EventArgs e)
		//		{
		//			workSocket=server.Accept();
		//			history.Items.Add("System : Accept a new connection request ...");
		//			statusBar1.Panels[1].Text="Connected";
		//			connected=true;
		//			updateUI();
		//		}
		#endregion
	}
}