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[C#] Socket 通讯，一个简单的聊天窗口小程序

　　Socket，这玩意，当时不会的时候，抄别人的都用不好，简单的一句话形容就是“笨死了”；也是很多人写的太复杂，不容易理解造成的。最近在搞erlang和C的通讯，也想试试erlang是不是可以和C#简单通讯，就简单的做了些测试用例，比较简单，觉得新手也可以接受。

  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 ChatClient
 14 {
 15     public partial class Form1 : Form
 16     {
 17         private System.Windows.Forms.RichTextBox richTextBox1;
 18         private System.Windows.Forms.TextBox textBox1;
 19         private System.ComponentModel.IContainer components = null;
 20 
 21         /// <summary>
 22         /// 服务端侦听端口
 23         /// </summary>
 24         private const int _serverPort = 8707;
 25         /// <summary>
 26         /// 客户端侦听端口
 27         /// </summary>
 28         private const int _clientPort = 8708;
 29         /// <summary>
 30         /// 缓存大小
 31         /// </summary>
 32         private const int _bufferSize = 1024;
 33         /// <summary>
 34         /// 服务器IP
 35         /// </summary>
 36         private const string ServerIP = "172.17.47.199";  //手动修改为指定服务器ip
 37 
 38         private Thread thread;
 39 
 40         private void Form1_Load(object sender, EventArgs e)
 41         {
 42             thread = new Thread(new ThreadStart(delegate { Listenning(); }));
 43             thread.Start();
 44         }
 45 
 46         void textBox_KeyUp(object sender, KeyEventArgs e)
 47         {
 48             if (e.KeyCode == Keys.Enter)
 49             {
 50                 string msg;
 51                 if ((msg = textBox1.Text.Trim()).Length > 0)
 52                 {
 53                     SendMessage(msg);
 54                 }
 55                 textBox1.Clear();
 56             }
 57         }
 58 
 59         void SendMessage(string msg)
 60         {
 61             try
 62             {
 63                 Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 64                 IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse(ServerIP), _serverPort);
 65                 socket.Connect(endPoint);
 66                 byte[] buffer = System.Text.ASCIIEncoding.UTF8.GetBytes(msg);
 67                 socket.Send(buffer);
 68                 socket.Close();
 69             }
 70             catch
 71             { }
 72         }
 73 
 74         void Listenning()
 75         {
 76             TcpListener listener = new TcpListener(_clientPort);
 77             listener.Start();
 78             while (true)
 79             {
 80                 Socket socket = listener.AcceptSocket();
 81                 byte[] buffer = new byte[_bufferSize];
 82                 socket.Receive(buffer);
 83                 int lastNullIndex = _bufferSize - 1;
 84                 while (true)
 85                 {
 86                     if (buffer[lastNullIndex] != '')
 87                         break;
 88                     lastNullIndex--;
 89                 }
 90                 string msg = Encoding.UTF8.GetString(buffer, 0, lastNullIndex + 1);
 91                 WriteLine(msg);
 92                 socket.Close();
 93             }
 94         }
 95 
 96         void WriteLine(string msg)
 97         {
 98             this.Invoke(new MethodInvoker(delegate
 99             {
100                 this.richTextBox1.AppendText(msg + Environment.NewLine);
101             }));
102         }
103 
104         public Form1()
105         {
106             this.richTextBox1 = new System.Windows.Forms.RichTextBox();
107             this.textBox1 = new System.Windows.Forms.TextBox();
108             this.SuspendLayout();
109             // 
110             // richTextBox1
111             // 
112             this.richTextBox1.Location = new System.Drawing.Point(1, 2);
113             this.richTextBox1.Name = "richTextBox1";
114             this.richTextBox1.Size = new System.Drawing.Size(282, 188);
115             this.richTextBox1.TabIndex = 3;
116             this.richTextBox1.Text = "";
117             this.richTextBox1.KeyUp += new System.Windows.Forms.KeyEventHandler(this.textBox_KeyUp);
118             // 
119             // textBox1
120             // 
121             this.textBox1.Location = new System.Drawing.Point(3, 196);
122             this.textBox1.Multiline = true;
123             this.textBox1.Name = "textBox1";
124             this.textBox1.Size = new System.Drawing.Size(277, 65);
125             this.textBox1.TabIndex = 2;
126             this.textBox1.KeyUp += new System.Windows.Forms.KeyEventHandler(this.textBox_KeyUp);
127             // 
128             // Form1
129             // 
130             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
131             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
132             this.ClientSize = new System.Drawing.Size(284, 262);
133             this.Controls.Add(this.richTextBox1);
134             this.Controls.Add(this.textBox1);
135             this.Name = "Form1";
136             this.Text = "Form1";
137             this.Load += new System.EventHandler(this.Form1_Load);
138             this.ResumeLayout(false);
139             this.PerformLayout();
140         }
141 
142         protected override void Dispose(bool disposing)
143         {
144             if (disposing && (components != null))
145             {
146                 components.Dispose();
147             }
148             base.Dispose(disposing);
149         }
150     }
151 }

Client端

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Diagnostics;
  6 using System.Linq;
  7 using System.ServiceProcess;
  8 using System.Text;
  9 using System.Net;
 10 using System.Net.Sockets;
 11 using System.Collections;
 12 
 13 namespace ChatService
 14 {
 15     public partial class Service1 : ServiceBase
 16     {
 17         /// <summary>
 18         /// 服务端侦听端口
 19         /// </summary>
 20         private const int _serverPort = 8707;
 21         /// <summary>
 22         /// 客户端侦听端口
 23         /// </summary>
 24         private const int _clientPort = 8708;
 25         /// <summary>
 26         /// 缓存大小
 27         /// </summary>
 28         private const int _bufferSize = 1024;
 29         /// <summary>
 30         /// 服务器IP
 31         /// </summary>
 32         private const string ServerIP = "172.17.47.199";  //手动修改为指定服务器ip
 33         /// <summary>
 34         /// 客户端IP
 35         /// </summary>
 36         //private Hashtable ServerIPs = new Hashtable();  //存放ip + port
 37         private List<string> ServerIPs = new List<string>();
 38 
 39         public Service1()
 40         {
 41             //InitializeComponent();   //从控制台改为服务，需要注释下面的一行，打开本行
 42             Listenning();
 43         }
 44 
 45         void SendMessage(string from, string msg)
 46         {
 47             
 48             for (int i = ServerIPs.Count - 1; i >= 0; i--)
 49             {
 50                 try
 51                 {
 52                     Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 53                     IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse(ServerIPs[i]), _clientPort);
 54                     socket.Connect(endPoint);
 55                     byte[] buffer = System.Text.ASCIIEncoding.UTF8.GetBytes((from + " say: " + msg).Trim());
 56                     socket.Send(buffer);
 57                     socket.Close();
 58                 }
 59                 catch
 60                 {
 61                     ServerIPs.RemoveAt(i);
 62                 }
 63             }
 64         }
 65 
 66         void Listenning()
 67         {
 68 
 69             TcpListener listener = new TcpListener(_serverPort);
 70             listener.Start();
 71             while (true)
 72             {
 73                 Socket socket = listener.AcceptSocket();
 74                 var s = socket.RemoteEndPoint.ToString();
 75                 var ipstr = s.Substring(0, s.IndexOf(":"));
 76 
 77                 if (!ServerIPs.Contains(ipstr))
 78                 {
 79                     ServerIPs.Add(ipstr);
 80                 }
 81 
 82                 byte[] buffer = new byte[_bufferSize];
 83                 socket.Receive(buffer);
 84                 int lastNullIndex = _bufferSize - 1;
 85 
 86                 while (true)
 87                 {
 88                     if (buffer[lastNullIndex] != '')
 89                         break;
 90                     lastNullIndex--;
 91                 }
 92                 string msg = Encoding.UTF8.GetString(buffer, 0, lastNullIndex + 1);
 93                 SendMessage(ipstr,msg);
 94                 Console.WriteLine(msg);//服务模式下关闭
 95             }
 96         }
 97 
 98         protected override void OnStart(string[] args)
 99         {
100             Listenning();
101         }
102 
103         protected override void OnStop()
104         {
105 
106         }
107     }
108 }

Server端

逻辑视图（比较简单）：

1.左上角的是一个远程客户端，右上角是本地客户端，右下角是本地服务端（暂时改为控制台程序）

2.这段程序只给不懂得如何用socket玩玩

3.这里面剔除了数据加密、异步获取等繁杂的过程，想要学习可以参照：http://yunpan.cn/cKT2ZHdKRMILz 访问密码 b610

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原文地址：https://www.cnblogs.com/preacher/p/4287793.html