C# Socket通讯实例

      socket的英文原义是“孔”或“插座”。通常称作"套接字"，用于描述IP地址和端口，是一个通信链的句柄。在Internet上的主机一般运行了多个服务软件，同时提供几种服务。每种服务都打开一个Socket，并绑定到一个端口上，不同的端口对应于不同的服务。Socket正如其英文原意那样，象一个多孔插座。

     创建Socket通讯的基本流程图

示例代码：

一、服务端

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Net.Sockets;using System.Text;using System.Threading;using System.Threading.Tasks;namespace CXZChatService.Service{    public static class SocketService    {        private static byte[] result = new byte[1024];        private static int myProt = 8085;   //端口号         static Socket serverSocket;        public static void startService()         {            IPAddress ip = IPAddress.Parse("127.0.0.1");            //第一个参数指定用IpV4方式寻址            //使用指定的地址族、套接字类型和协议初始化 Socket 类的新实例。            serverSocket = new Socket(AddressFamily.InterNetwork,                SocketType.Stream, ProtocolType.Tcp);            serverSocket.Bind(new IPEndPoint(ip, myProt)); //绑定IP地址：端口            serverSocket.Listen(100);//设定最多100个排队连接请求             Console.WriteLine("启动监听{0}成功", serverSocket.LocalEndPoint.ToString());            Thread myThread = new Thread(ListenClientConnect);            myThread.Start();            Console.ReadLine();          }        /// <summary>        /// 监听客户端的连接        /// </summary>        public static void ListenClientConnect()         {            while (true)            {                Socket clientSocket = serverSocket.Accept();//等待客户端的连接                          //  clientSocket.Send(Encoding.ASCII.GetBytes("Server Say Hello"));//向客户端发送数据                Thread receiveThread = new Thread(receiveRegister);//启动一个线程来接受数据                receiveThread.Start(clientSocket);            }        }        /// <summary>        /// 接收消息        /// </summary>        /// <param name="clientSocket"></param>        public static void ReceiveMessage(object clientSocket)         {            Socket myClientSocket = (Socket)clientSocket;            while(true)            {                try                {                    int receiveNumber = myClientSocket.Receive(result);                    Console.WriteLine("接收客户端{0}消息{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.ASCII.GetString(result, 0, receiveNumber));                 }                catch (Exception ex)                {                    Console.WriteLine(ex.Message);                    myClientSocket.Shutdown(SocketShutdown.Both);                    myClientSocket.Close();                    break;                }            }        }        /// <summary>        /// 接收注册信息        /// </summary>        /// <param name="clientSocket"></param>        public static void receiveRegister(object clientSocket)         {            Socket myClientSocket = (Socket)clientSocket;            while(true)            {                try                {                    int receiveNumber = myClientSocket.Receive(result);                    string register = Encoding.ASCII.GetString(result, 0, receiveNumber);                    String[] r = AnalyseString.AnalyseStr(register);                    if (r[0].Equals("register"))                    {                        List<string> list = new List<string>();                        list.Add(r[1]);                        list.Add(myClientSocket.RemoteEndPoint.ToString());                        User.userlist.Add(list);                        Console.WriteLine(r[1]);                    }                                   }catch (Exception ex)                {                    Console.WriteLine(ex.Message);                    myClientSocket.Shutdown(SocketShutdown.Both);                    myClientSocket.Close();                    break;                }            }        }    }}

在主函数中调用startService()即可

二、客户端代码using System;

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Net;  using System.Net.Sockets;  using System.Threading; namespace CXZClient{    class Client    {        private static byte[] result = new byte[1024];        public static void startClient()         {            string message = null;//客户端名字            IPAddress ip = IPAddress.Parse("127.0.0.1");            Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            try            {                clientSocket.Connect(new IPEndPoint(ip, 8085)); //连接服务器IP与端口                 Console.WriteLine("连接服务器成功");                message = Console.ReadLine();            }            catch            {                Console.WriteLine("连接服务器失败，请按回车键退出！");                return;            }            //通过clientSocket接收数据            try            {                clientSocket.Send(Encoding.ASCII.GetBytes("register#" + message));            }            catch            {                clientSocket.Shutdown(SocketShutdown.Both);               // clientSocket.Close();            } //--------------------------            Console.WriteLine("按回车键退出");            Console.ReadLine();                  }           }}

在客户端发送完消息后回车，这是客户端代码执行完毕，服务会关闭这个客户端的连接。