SYSTEM.NET.SOCKET命名空间之SOCKET类。。。

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原文链接：http://www.cnblogs.com/aguncn/archive/2013/06/12/3132440.html

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#网络 #运维

本文介绍了一个使用C#进行Socket编程的简单示例，包括连接服务器、发送请求及接收响应的基本流程。通过该示例可以了解如何利用Socket类实现TCP连接，并进行基本的数据收发操作。

 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.Threading.Tasks;
 9 using System.Windows.Forms;
10 using System.Net.Sockets;
11 using System.Net;
12 
13 namespace WindowsFormsApplication5
14 {
15     public partial class Form1 : Form
16     {
17         public Form1()
18         {
19             InitializeComponent();
20         }
21         private static Socket ConnectSocket(string server, int port)
22         {
23             Socket socket = null;
24             IPHostEntry iphostentry = null;
25             iphostentry = Dns.GetHostEntry(server);
26             foreach(IPAddress address in iphostentry.AddressList)
27             {
28                 IPEndPoint IPEPoint = new IPEndPoint(address,port);
29                 Socket newSocket = new Socket(IPEPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
30                 newSocket.Connect(IPEPoint);
31                 if(newSocket.Connected)
32                 {
33                     socket = newSocket;
34                     break;
35                 }
36                 else
37                 {
38                     continue;
39                 }
40             }
41             return socket;
42         }
43 
44         private static string SocketSendReveive(string server, int port)
45         {
46             string request = "GET/HTTP/1.1\n Host: " + server + "\n connetc: close\n";
47             Byte[] btSend = Encoding.ASCII.GetBytes(request);
48             Byte[] btReceived = new Byte[256];
49             Socket socket = ConnectSocket(server,port);
50             if(socket == null)
51                 return ("connect failed.");
52             socket.Send(btSend,btSend.Length,0);
53             int intContent = 0;
54             string strContent = server + " 's content :\n";
55             do
56             {
57                 intContent = socket.Receive(btReceived, btReceived.Length, 0);
58                 strContent += Encoding.ASCII.GetString(btReceived,0,intContent);
59             }
60             while(intContent > 0);
61             return strContent;
62         }
63 
64 
65 
66         private void button1_Click(object sender, EventArgs e)
67         {
68             string server = textBox1.Text;
69             int port = Convert.ToInt32(textBox2.Text);
70             string strContent = SocketSendReveive(server, port);
71             MessageBox.Show(strContent);
72 
73         }
74     }
75 }