博客园看到的socket基本原理

Socket基本编程

         最近由于在做一个银电联网的项目，要用Socket进行通信传递数据，所以又整理了一下Socket和TCP协议编程的一些基本知识，整理一下放在这里，稍后会把Socket异步通信一些基本要点也整理一下。(2004年11月)

服务端：

using System.Net;

using System.Net.Sockets;

using System.Text;

using System.Threading;

        

         Thread mythread ;

         Socket socket;

// 清理所有正在使用的资源。

         protected override void Dispose( bool disposing )

         {

              try

　            { 　　            

　　          socket.Close();//释放资源

　　          mythread.Abort ( ) ;//中止线程

　            }

　            catch{ }

              if( disposing )

              {

                   if (components != null)

                   {

                       components.Dispose();

                   }

              }

              base.Dispose( disposing );

         }       

         public static IPAddress GetServerIP()

         {

              IPHostEntry ieh=Dns.GetHostByName(Dns.GetHostName());

              return ieh.AddressList[0];

         }

         private void BeginListen()

         {

              IPAddress ServerIp=GetServerIP();

              IPEndPoint iep=new IPEndPoint(ServerIp,8000);

              socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);

             

              byte[] byteMessage=new byte[100]; 

              this.label1.Text=iep.ToString();

              socket.Bind(iep); 

//            do

              while(true)

              {

                   try

                   {

                       socket.Listen(5);

                       Socket newSocket=socket.Accept();

                       newSocket.Receive(byteMessage);

                       string sTime = DateTime.Now.ToShortTimeString ( ) ;

                       string msg=sTime+":"+"Message from:";

                       msg+=newSocket.RemoteEndPoint.ToString()+Encoding.Default.GetString(byteMessage);

                       this.listBox1.Items.Add(msg);

                      

                   }

                   catch(SocketException ex)

                   {

                       this.label1.Text+=ex.ToString();

                   }

              }

//            while(byteMessage!=null);

         }

         //开始监听

         private void button1_Click(object sender, System.EventArgs e)

         {

              try

              {

                   mythread = new Thread(new ThreadStart(BeginListen));

                   mythread.Start();

              }

              catch(System.Exception er)

              {

                   MessageBox.Show(er.Message,"完成",MessageBoxButtons.OK,MessageBoxIcon.Stop);

              }           

         }

客户端：

 

using System.Net;

using System.Net.Sockets;

using System.Text;

         private void button1_Click(object sender, System.EventArgs e)

         {

              BeginSend();      

         }

         private void BeginSend()

         {            

              string ip=this.txtip.Text;

              string port=this.txtport.Text;

              IPAddress serverIp=IPAddress.Parse(ip);           

              int serverPort=Convert.ToInt32(port);

              IPEndPoint iep=new IPEndPoint(serverIp,serverPort); 

              byte[] byteMessage; 

//            do

//            {

                   Socket socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);

                   socket.Connect(iep);

             

                   byteMessage=Encoding.ASCII.GetBytes(textBox1.Text);

                   socket.Send(byteMessage);

                   socket.Shutdown(SocketShutdown.Both);

                   socket.Close();

//            }

//            while(byteMessage!=null);

         }