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:

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using System.Net.Sockets;
 10 using System.Net;
 11 using System.Threading;
 12 
 13 namespace ClientSocket_Demo
 14 {
 15     public partial class Client : Form
 16     {
 17         public Client()
 18         {
 19             InitializeComponent();
 20             Control.CheckForIllegalCrossThreadCalls = false;
 21         }
 22 
 23         private Socket connSocket;
 24         private Thread ReceiveThread;
 25 
 26         private void btnConnection_Click(object sender, EventArgs e)
 27         {
 28             if (string.IsNullOrEmpty(txtIp.Text))
 29             {
 30                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "ip is null");
 31                 return;
 32             }
 33             if (string.IsNullOrEmpty(txtPort.Text))
 34             {
 35                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "port is null");
 36                 return;
 37             }
 38             Connection();
 39         }
 40 
 41         private void btnSend_Click(object sender, EventArgs e)
 42         {
 43             if (string.IsNullOrEmpty(txtMsg.Text))
 44             {
 45                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "msg is null");
 46                 return;
 47             }
 48             SendMsg();
 49         }
 50 
 51         /// <summary>
 52         /// connection
 53         /// </summary>
 54         private void Connection()
 55         {
 56             IPAddress ip = IPAddress.Parse(txtIp.Text);
 57             IPEndPoint endPoint = new IPEndPoint(ip, int.Parse(txtPort.Text));
 58             connSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 59             try
 60             {
 61                 connSocket.Connect(endPoint);
 62                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "connection success.");
 63                 btnConnection.Enabled = false;
 64 
 65             }
 66             catch (Exception ex)
 67             {
 68                 connSocket.Close();
 69                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "connection fail.");
 70                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
 71             }
 72 
 73             ReceiveThread = new Thread(ReceiveCallBack);
 74             ReceiveThread.Start();
 75             ReceiveThread.IsBackground = true;
 76         }
 77 
 78         /// <summary>
 79         /// send msg
 80         /// </summary>
 81         private void SendMsg()
 82         {
 83             byte[] buffer = new byte[1024];
 84             string msg = txtMsg.Text;
 85             lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
 86             buffer = Encoding.Unicode.GetBytes(msg);
 87 
 88             if (connSocket != null)
 89             {
 90                 connSocket.Send(buffer);
 91             }
 92             else 
 93             {
 94                 connSocket.Close();
 95                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "send fail.");
 96                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "no connection!");
 97             }
 98         }
 99 
100         /// <summary>
101         /// receive
102         /// </summary>
103         private void ReceiveCallBack()
104         {
105             byte[] buffer = new byte[1024];
106             int count = 0;
107 
108             while (true)
109             {
110                 Thread.Sleep(1000);
111                 try
112                 {
113                     count = connSocket.Receive(buffer);
114                     if (count == 0)
115                     {
116                         connSocket.Close();
117                         lstLog.Items.Add(DateTime.Now.ToString() + ":server disconnect.");
118                         break;
119                     }
120                     string msg = Encoding.Unicode.GetString(buffer,0, count);
121                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
122                 }
123                 catch (Exception ex)
124                 {
125                     connSocket.Close();
126                     lstLog.Items.Add(DateTime.Now.ToString() + ":server disconnect.");
127                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
128                     break;
129                 }
130             }
131         }
132     }
133 }

View Code

2.Server code:

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Net;
  8 using System.Net.Sockets;
  9 using System.Text;
 10 using System.Threading;
 11 using System.Windows.Forms;
 12 
 13 namespace Socket_Demo
 14 {
 15     public partial class Server : Form
 16     {
 17         public Server()
 18         {
 19             InitializeComponent();
 20             Control.CheckForIllegalCrossThreadCalls = false;
 21         }
 22 
 23         private Socket connSocket;
 24         private Thread listenThread;
 25         private Thread ReceiveThread;
 26 
 27         private void button1_Click(object sender, EventArgs e)
 28         {
 29             if (string.IsNullOrEmpty(txtIp.Text))
 30             {
 31                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "ip is null");
 32                 return;
 33             }
 34             if (string.IsNullOrEmpty(txtPort.Text))
 35             {
 36                 lstLog.Items.Add(DateTime.Now.ToString() + ":" + "port is null");
 37                 return;
 38             }
 39             Start();
 40         }
 41 
 42         /// <summary>
 43         /// start
 44         /// </summary>
 45         private void Start()
 46         {
 47             byte[] buffer = new byte[1024];
 48             IPAddress ip = IPAddress.Parse(txtIp.Text);
 49             IPEndPoint endPoint = new IPEndPoint(ip, int.Parse(txtPort.Text));
 50             connSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 51             connSocket.Bind(endPoint);
 52             connSocket.Listen(10);
 53             lstLog.Items.Add(DateTime.Now.ToString() + ":" + "listen:" + txtPort.Text);
 54             button1.Enabled = false;
 55 
 56             //监听线程
 57             listenThread = new Thread(ListenCallBack);
 58             listenThread.Start(connSocket);
 59             listenThread.IsBackground = true;
 60         }
 61 
 62         /// <summary>
 63         /// listen
 64         /// </summary>
 65         /// <param name="o"></param>
 66         private void ListenCallBack(object obj)
 67         {
 68             string ip = string.Empty;
 69 
 70             //创建监听套接字
 71             Socket listenSocket = obj as Socket;
 72 
 73             while (true)
 74             {
 75                 Thread.Sleep(1000);
 76 
 77                 try
 78                 {
 79                     //创建通信套接字
 80                     Socket socket = listenSocket.Accept();
 81                     ip = socket.RemoteEndPoint.ToString();
 82                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + " connect success.");
 83 
 84                     //通信线程
 85                     ReceiveThread = new Thread(ReceiveCallBack);
 86                     ReceiveThread.Start(socket);
 87                     ReceiveThread.IsBackground = true;
 88                 }
 89                 catch (Exception ex)
 90                 {
 91                     listenSocket.Close();
 92                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
 93                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + " connect fail.");
 94                     break;
 95                 }
 96             }
 97         }
 98 
 99         /// <summary>
100         /// receive
101         /// </summary>
102         /// <param name="o"></param>
103         private void ReceiveCallBack(object o)
104         {
105             byte[] buffer = new byte[1024];
106             int count = 0;
107             string ip = string.Empty;
108 
109             Socket ReceiveSocket = o as Socket;
110 
111             while (true)
112             {
113                 Thread.Sleep(1000);
114                 try
115                 {
116                     ip = ReceiveSocket.RemoteEndPoint.ToString();
117                     count = ReceiveSocket.Receive(buffer);
118                     if (count == 0)
119                     {
120                         ReceiveSocket.Close();
121                         lstLog.Items.Add(DateTime.Now.ToString() + ":client disconnect.");
122                         break;
123                     }
124                     string msg = Encoding.Unicode.GetString(buffer, 0, count);
125                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + msg);
126                 }
127                 catch (Exception ex)
128                 {
129                     ReceiveSocket.Close();
130                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ip + "client disconnect.");
131                     lstLog.Items.Add(DateTime.Now.ToString() + ":" + ex.ToString());
132                     break;
133                 }
134             }
135         }
136 
137         private void Server_Load(object sender, EventArgs e)
138         {
139             var localhostIp = Dns.GetHostEntry(Dns.GetHostName()).AddressList[5];
140             txtIp.Text = localhostIp.ToString();
141             txtPort.Text = "8000";
142         }
143     }
144 }

View Code

四.注意事项：