frmserver.cs

实现了局域网聊天室

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace WindowsApplication1
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class frmServer : System.Windows.Forms.Form
	{
		private ArrayList clients;
		private int listenport;
		private TcpListener listener;
		private Thread processor;
		private Socket clientsocket;
		private Thread clientservice;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.ListBox lstClients;
		private System.Windows.Forms.Button btnExit;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmServer()
		{
			//
			// 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 );
		}

		#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.label1 = new System.Windows.Forms.Label();
			this.lstClients = new System.Windows.Forms.ListBox();
			this.btnExit = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(8, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(144, 16);
			this.label1.TabIndex = 0;
			this.label1.Text = "现在在线聊天的有：";
			// 
			// lstClients
			// 
			this.lstClients.ItemHeight = 12;
			this.lstClients.Location = new System.Drawing.Point(16, 40);
			this.lstClients.Name = "lstClients";
			this.lstClients.Size = new System.Drawing.Size(256, 184);
			this.lstClients.TabIndex = 1;
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(192, 240);
			this.btnExit.Name = "btnExit";
			this.btnExit.TabIndex = 2;
			this.btnExit.Text = "退出(&E)";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// frmServer
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.lstClients);
			this.Controls.Add(this.label1);
			this.Name = "frmServer";
			this.Text = "服务器端聊天程序";
			this.Load += new System.EventHandler(this.frmServer_Load);
			this.ResumeLayout(false);

		}
		#endregion

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

		private void StartListening()
		{
			listener=new TcpListener(listenport);
			listener.Start();
			while(true)
			{
				try
				{
					Socket s=listener.AcceptSocket();
					clientsocket=s;
					clientservice=new Thread(new ThreadStart(ServiceClient));
					clientservice.Start();
				}
				catch(Exception e)
				{
					Console.WriteLine(e.ToString());
				}
			}
		}

		private void ServiceClient()
		{
			Socket client=clientsocket;
			bool keepalive=true;
			while(keepalive)
			{
				Byte[] buffer=new Byte[1024];
				client.Receive(buffer);
				string clientcommand=System.Text.Encoding.GetEncoding("gb2312").GetString(buffer);
				string[] tokens=clientcommand.Split(new Char[]{'|'});

				if(tokens[0]=="CONN")//连接
				{
					for(int n=0;n<clients.Count;n++)
					{
						Client cl=(Client)clients[n];
						SendToClient(cl,"JOIN|"+tokens[1]);
					}
					EndPoint ep=client.RemoteEndPoint;
					string name=tokens[1].Trim(new Char[]{'\0'});
					Client c=new Client(name,ep,clientservice,client);
					clients.Add(c);
					string message="LIST|"+GetChatterList();
					SendToClient(c,message);
					lstClients.Items.Add(c.Name+":"+c.Host.ToString());
				}
				else if(tokens[0].Equals("CHAT"))//聊天
				{
					for(int n=0;n<clients.Count;n++)
					{
						Client cl=(Client)clients[n];
						SendToClient(cl,clientcommand);
					}
				}
				else if(tokens[0].Equals("PRIV"))//私聊
				{
					string destclient=tokens[3];
					for(int n=0;n<clients.Count;n++)
					{
						Client cl=(Client)clients[n];
						if(cl.Name.CompareTo(tokens[3])==0)
							SendToClient(cl,clientcommand);
						if(cl.Name.CompareTo(tokens[1])==0)
							SendToClient(cl,clientcommand);
					}
				}
				else if(tokens[0].Equals("GONE"))
				{
					int remove=0;
					bool found=false;
					int c=clients.Count;
					for(int n=0;n<c;n++)
					{
						Client cl=(Client)clients[n];
						SendToClient(cl,clientcommand);
						if(cl.Name.CompareTo(tokens[1])==0)
						{
							remove=n;
							found=true;
							lstClients.Items.Remove(cl.Name+":"+cl.Host.ToString());
						}
					}
					if(found)
						clients.RemoveAt(remove);
					client.Close();
					keepalive=false;
				}
			}
		}

		private void SendToClient(Client cl,string message)
		{
			try
			{
				byte[] buffer=System.Text.Encoding.GetEncoding("gb2312").GetBytes(message.Trim(new Char[]{'\0'}).ToCharArray());
				cl.Sock.Send(buffer);
			}
			catch(Exception e)
			{
				Console.WriteLine(e.ToString());
				cl.Sock.Close();
				cl.CLThread.Abort();
				clients.Remove(cl);
				lstClients.Items.Remove(cl.Name+":"+cl.Host.ToString());
			}
		}

		private string GetChatterList()
		{
			string chatters="";
			for(int n=0;n<clients.Count;n++)
			{
				Client cl=(Client)clients[n];
				chatters+=cl.Name;
				chatters+="|";
			}
			chatters.Trim(new char[]{'|'});
			return chatters;
		}

		private void frmServer_Load(object sender, System.EventArgs e)
		{
			listenport=0228;	
			clients=new ArrayList();
			processor=new Thread(new ThreadStart(StartListening));
			processor.Start();
		}

		protected override void OnClosed(EventArgs e)
		{
			try
			{
				for(int n=0;n<clients.Count;n++)
				{
					Client cl=(Client)clients[n];
					SendToClient(cl,"QUIT|");
					cl.Sock.Close();
					cl.CLThread.Abort();
				}
				listener.Stop();
				if(processor!=null)
					processor.Abort();
			}
			catch(Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
			base.OnClosed(e);
		}

		private void btnExit_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}
	}
}