socket 学习（转载）

原文：http://www.cnblogs.com/licongjie/archive/2006/10/26/540640.html
服务器端代码：

  1using System;
  2using System.Collections.Generic;
  3using System.ComponentModel;
  4using System.Data;
  5using System.Drawing;
  6using System.Linq;
  7using System.Text;
  8using System.Windows.Forms;
  9using System.Net;
 10using System.Net.Sockets;
 11using System.Threading;
 12
 13namespace Server
 14{
 15    public partial class Form1 : Form
 16    {
 17        public Form1()
 18        {
 19            InitializeComponent();
 20        }
 21
 22        Thread serverThread;
 23        Thread clientThread;
 24        Socket serverSocket;
 25        Socket clientSocket;
 26
 27        public void ServerStart()
 28        {
 29            IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 6009);
 30            serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 31
 32            serverSocket.Bind(ipep);
 33
 34            serverSocket.Listen(10);
 35
 36            while (true)
 37            {
 38                try
 39                {
 40                    clientSocket = serverSocket.Accept();
 41                    clientThread = new Thread(new ThreadStart(ReceiveData));
 42                    clientThread.Start();
 43                }
 44                catch (Exception ex)
 45                {
 46                    MessageBox.Show("listening Error:" + ex.Message);
 47                }
 48            }
 49        }
 50
 51        private void ReceiveData()
 52        {
 53            bool keepalive = true;
 54
 55            Socket s = clientSocket;
 56
 57            Byte[] buffer = new Byte[1024];
 58
 59            //根据接收到得客户端套接字，向客户端发送信息
 60
 61            IPEndPoint clientep = (IPEndPoint)s.RemoteEndPoint;
 62            lstServer.Items.Add("Client:" + clientep.Address + "(" + clientep.Port + ")");
 63
 64            string welcome = "welcome to here ";
 65
 66            byte[] data = new byte[1024];
 67
 68            data = Encoding.ASCII.GetBytes(welcome);
 69
 70            s.Send(data, data.Length, SocketFlags.None);
 71
 72            while (keepalive)
 73            {
 74                int bufLen = 0;
 75
 76                try
 77                {
 78                    bufLen = s.Available;
 79
 80                 
 81
 82                    s.Receive(buffer, 0, bufLen, SocketFlags.None);
 83
 84                    if (bufLen == 0)
 85                        continue;
 86                }
 87                catch (Exception ex)
 88                {
 89                    MessageBox.Show("Receive Error:" + ex.Message);
 90
 91                    return;
 92                }
 93
 94                clientep = (IPEndPoint)s.RemoteEndPoint;
 95
 96                string clientcommand = System.Text.Encoding.ASCII.GetString(buffer).Substring(0, bufLen);
 97
 98
 99                lstServer.Items.Add(clientcommand + "(" + clientep.Address + ":" + clientep.Port + ")");
100
101
102                string today = "today";
103                byte[] data2 = new byte[1024];
104                data2 = Encoding.ASCII.GetBytes(today);
105
106                s.Send(data2, data2.Length, SocketFlags.None);
107                   
108            }
109
110
111        }
112
113        private void btnOpen_Click(object sender, EventArgs e)
114        {
115            serverThread = new Thread(new ThreadStart(ServerStart));
116            serverThread.Start();
117
118            lstServer.Items.Add("Server Start .");
119        }
120    }
121}
122

客户端代码：

 1using System;
 2using System.Collections.Generic;
 3using System.ComponentModel;
 4using System.Data;
 5using System.Drawing;
 6using System.Linq;
 7using System.Text;
 8using System.Windows.Forms;
 9using System.Net;
10using System.Net.Sockets;
11using System.Threading;
12
13namespace Client
14{
15    public partial class Form1 : Form
16    {
17        Socket clientSocket;
18        Thread clientThread;
19        
20        public Form1()
21        {
22            InitializeComponent();
23        }
24
25
26        private void ConnectToServer()
27        {
28            byte[] data = new byte[1024];
29
30            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 6009);
31
32            clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
33
34            try
35            {
36                clientSocket.Connect(ipep);
37            }
38            catch (SocketException ex)
39            {
40                MessageBox.Show("connect error:" + ex.Message);
41                return;
42            }
43
44            while (true)
45            {
46                int bufLen = 0;
47
48                try
49                {
50                    bufLen = clientSocket.Available;
51                    clientSocket.Receive(data, 0, bufLen, SocketFlags.None);
52
53                    if (bufLen == 0)
54                    {
55                        continue;
56                    }
57                }
58                catch (Exception ex)
59                {
60                    MessageBox.Show("Receive Error:" + ex.Message);
61                    return;
62                }
63
64                string clientcommand = System.Text.Encoding.ASCII.GetString(data).Substring(0, bufLen);
65
66                lstClient.Items.Add(clientcommand);
67            }
68        }
69
70        private void button1_Click(object sender, EventArgs e)
71        {
72            clientThread = new Thread(new ThreadStart(ConnectToServer));
73            clientThread.Start();
74        }
75
76        private void btnSend_Click(object sender, EventArgs e)
77        {
78            byte[] data = new byte[1024];
79
80            data = Encoding.ASCII.GetBytes(txtClient.Text);
81
82            clientSocket.Send(data, data.Length, SocketFlags.None);
83        }
84    }
85}
86

代码下载：/Files/wenjie/socketsample.rar