socket socket讲解

socket  socket讲解

一.socket是何物？

参考百度百科：

http://baike.baidu.com/link?url=4YNURsJLEaL0II79C68gPUoYKliXWJLM8V6H5QL0r_QOEmrxSQsnFPYxeuBx1U1bukTcAxhcl1glTOjxiGZBgSqb5G9_4N9Dj-XX-jXtXba

二.socket常用类及函数讲解：(为如下demo做准备)

IPAddress：

IPAddress.Parse();

IPEndPoint:

Encoding：

Encoding.Unicode.GetString()
Encoding.Unicode.GetBytes()

Socket：

Send、Receive、Accept；

Thread:

Thread.Sleep();

三.Demo:（仅供参考）

1.Client  code:

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

 namespace ClientSocket_Demo
 {
     public partial class Client : Form
     {
         public Client()
         {
             InitializeComponent();
             Control.CheckForIllegalCrossThreadCalls = false;
         }

         private Socket connSocket;
         private Thread ReceiveThread;

         private void btnConnection_Click(object sender, EventArgs e)
         {
             if (string.IsNullOrEmpty(txtIp.Text))
             {
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "ip is null");
                 return;
             }
             if (string.IsNullOrEmpty(txtPort.Text))
             {
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "port is null");
                 return;
             }
             Connection();
         }

         private void btnSend_Click(object sender, EventArgs e)
         {
             if (string.IsNullOrEmpty(txtMsg.Text))
             {
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "msg is null");
                 return;
             }
             SendMsg();
         }

         /// <summary>
         /// connection
         /// </summary>
         private void Connection()
         {
             IPAddress ip = IPAddress.Parse(txtIp.Text);
             IPEndPoint endPoint = new IPEndPoint(ip, int.Parse(txtPort.Text));
             connSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             try
             {
                 connSocket.Connect(endPoint);
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "connection success.");
                 btnConnection.Enabled = false;

             }
             catch (Exception ex)
             {
                 connSocket.Close();
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "connection fail.");
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
             }

             ReceiveThread = new Thread(ReceiveCallBack);
             ReceiveThread.Start();
             ReceiveThread.IsBackground = true;
         }

         /// <summary>
         /// send msg
         /// </summary>
         private void SendMsg()
         {
             byte[] buffer = new byte[];
             string msg = txtMsg.Text;
             lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
             buffer = Encoding.Unicode.GetBytes(msg);

             if (connSocket != null)
             {
                 connSocket.Send(buffer);
             }
             else
             {
                 connSocket.Close();
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "send fail.");
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "no connection!");
             }
         }

         /// <summary>
         /// receive
         /// </summary>
         private void ReceiveCallBack()
         {
             byte[] buffer = new byte[];
             int count = ;

             while (true)
             {
                 Thread.Sleep();
                 try
                 {
                     count = connSocket.Receive(buffer);
                     if (count == )
                     {
                         connSocket.Close();
                         lstLog.Items.Add(DateTime.Now.ToString() + ":server disconnect.");
                         break;
                     }
                     string msg = Encoding.Unicode.GetString(buffer,, count);
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
                 }
                 catch (Exception ex)
                 {
                     connSocket.Close();
                     lstLog.Items.Add(DateTime.Now.ToString() + ":server disconnect.");
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
                     break;
                 }
             }
         }
     }
 }

2.Server code:

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

 namespace Socket_Demo
 {
     public partial class Server : Form
     {
         public Server()
         {
             InitializeComponent();
             Control.CheckForIllegalCrossThreadCalls = false;
         }

         private Socket connSocket;
         private Thread listenThread;
         private Thread ReceiveThread;

         private void button1_Click(object sender, EventArgs e)
         {
             if (string.IsNullOrEmpty(txtIp.Text))
             {
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "ip is null");
                 return;
             }
             if (string.IsNullOrEmpty(txtPort.Text))
             {
                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "port is null");
                 return;
             }
             Start();
         }

         /// <summary>
         /// start
         /// </summary>
         private void Start()
         {
             byte[] buffer = new byte[];
             IPAddress ip = IPAddress.Parse(txtIp.Text);
             IPEndPoint endPoint = new IPEndPoint(ip, int.Parse(txtPort.Text));
             connSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             connSocket.Bind(endPoint);
             connSocket.Listen();
             lstLog.Items.Add(DateTime.Now.ToString() + ":" + "listen:" + txtPort.Text);
             button1.Enabled = false;

             //监听线程
             listenThread = new Thread(ListenCallBack);
             listenThread.Start(connSocket);
             listenThread.IsBackground = true;
         }

         /// <summary>
         /// listen
         /// </summary>
         /// <param name="o"></param>
         private void ListenCallBack(object obj)
         {
             string ip = string.Empty;

             //创建监听套接字
             Socket listenSocket = obj as Socket;

             while (true)
             {
                 Thread.Sleep();

                 try
                 {
                     //创建通信套接字
                     Socket socket = listenSocket.Accept();
                     ip = socket.RemoteEndPoint.ToString();
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + " connect success.");

                     //通信线程
                     ReceiveThread = new Thread(ReceiveCallBack);
                     ReceiveThread.Start(socket);
                     ReceiveThread.IsBackground = true;
                 }
                 catch (Exception ex)
                 {
                     listenSocket.Close();
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + " connect fail.");
                     break;
                 }
             }
         }

         /// <summary>
         /// receive
         /// </summary>
         /// <param name="o"></param>
         private void ReceiveCallBack(object o)
         {
             byte[] buffer = new byte[];
             int count = ;
             string ip = string.Empty;

             Socket ReceiveSocket = o as Socket;

             while (true)
             {
                 Thread.Sleep();
                 try
                 {
                     ip = ReceiveSocket.RemoteEndPoint.ToString();
                     count = ReceiveSocket.Receive(buffer);
                     if (count == )
                     {
                         ReceiveSocket.Close();
                         lstLog.Items.Add(DateTime.Now.ToString() + ":client disconnect.");
                         break;
                     }
                     string msg = Encoding.Unicode.GetString(buffer, , count);
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
                 }
                 catch (Exception ex)
                 {
                     ReceiveSocket.Close();
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + "client disconnect.");
                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
                     break;
                 }
             }
         }

         private void Server_Load(object sender, EventArgs e)
         {
             var localhostIp = Dns.GetHostEntry(Dns.GetHostName()).AddressList[];
             txtIp.Text = localhostIp.ToString();
             txtPort.Text = "";
         }
     }
 }

四.注意事项：