多线程在网络编程中的应用

一.服务器端：

Thradtcpserver.cs

 

 class Threadtcpserver
    {
        private Socket server;
        public Threadtcpserver()
        {
            IPAddress local = IPAddress.Parse("127.0.0.1");
            IPEndPoint iep = new IPEndPoint(local, 13000);
            server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            server.Bind(iep);
            server.Listen(20);
            Console.WriteLine("等待客户机进行连接...");

            while (true)
            {
                Socket client = server.Accept();
                ClientThread newClient = new ClientThread(client);
                Thread newThread = new Thread(new ThreadStart(newClient.ClientService));
                newThread.Start();
                Thread.Sleep(100);//保证执行newThread线程
            }

        }
    }

 

 

ClientThread.cs

 

class ClientThread
    {
        public static int connections = 0;//变量表示连接数
        public Socket server;
        int i;

        public ClientThread(Socket clientsocket)
        {
            this.server = clientsocket;
        }
        public void ClientService()
        {
            string data = null;
            byte[] bytes = new byte[1024];
            if (server != null)
            {
                connections++;
            }
            Console.WriteLine("新客户端连接建立：{0} 个连接数", connections);
            while (server.Connected)
            {
                try
                {
                    i = server.Receive(bytes);
                }
                catch
                {
                    break ;
                }
                if (i != 0)
                {
                    data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
                    Console.WriteLine("收到的数据：{0}", data);
                    //处理客户端信息，这里把信息转化为大写
                    data = data.ToUpper();
                    byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);
                    server.Send(msg);
                    Console.WriteLine("发送的数据：{0}", data);
                }
                 
            }
            //关闭套接字
            server.Close();
            connections--;
            Console.WriteLine("客户端关闭连接：{0}个连接数", connections); 
        }

    }

Program.cs

 

 static void Main(string[] args)
        {
            Threadtcpserver instance = new Threadtcpserver();
        }

 

 

 

二.客户端：

 

 class Program
    {
        static void Main(string[] args)
        {
            Socket client;
            byte[] buf = new byte[1024];
            string input;
            IPAddress local = IPAddress.Parse("127.0.0.1");
            IPEndPoint iep = new IPEndPoint(local, 13000);
            try
            {
                client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                client.Connect(iep);
            }
            catch
            {
                Console.WriteLine("无法连接服务器！");
                    return ;
            }
            finally 
            {
                
            }

            while (true)
            {
                input = Console.ReadLine();
                if (input == "exit")
                {
                    break;
                }
                client .Send (Encoding .ASCII .GetBytes(input ));
                int rec=client .Receive (buf);
                Console .WriteLine (Encoding .ASCII .GetString (buf ,0,rec));
            }
            Console .WriteLine ("断开服务器连接...");
            client .Close ();
        }
    }