C# Socket Sample(Client-server)

Server 端：

namespace lf.socket.clientserver
{

    class Server

    {

        static void Main(string[] args)

        {

            IPEndPoint ipont = new IPEndPoint(IPAddress.Any, 20);

            //將IP位址和Port宣告為服務的連接點(所有網路介面卡 IP,20 Port)

            Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //宣告一個Socket通訊介面(使用IPv4協定,通訊類型,通訊協定)

            newsock.Bind(ipont);

            //建立本機連線   

            newsock.Listen(10);

            //偵測連接(最大連接數)

            while (true)

            { 

                Socket client = newsock.Accept();

                //宣告一個Socket等於新建立的連線

                IPEndPoint clientip = (IPEndPoint)client.RemoteEndPoint;

                //宣告一個連接點為socket端的連接點

                System.Console.WriteLine("Client End Point = " + clientip);

                //印出遠端IP位址

                SocketListener listener = new SocketListener(client);

                //宣告一個監聽類別SocketListener監聽client訊息

                Thread thread = new Thread(new ThreadStart(listener.run));

                //宣告一個執行序去跑SocketListener監聽事件

                thread.Start();           

            }

        }

    }



    public class SocketListener

    {

        private Socket socket;

        public SocketListener(Socket socket)

        {

            this.socket = socket;

            //建構元取得遠端socket連線

        }

        public void run()

        {

            while (true)

            {

                byte[] data = new byte[1024];

                //定義一個資料緩衝區接收長度最大為(1024)

                int len = socket.Receive(data);

                //接收資料至緩衝區中並回傳成功街收位元數

                if (len == 0) break;

                //若成功接收位元數為0則跳出迴圈

                System.Console.WriteLine(Encoding.UTF8.GetString(data,0,len));

                //印出編碼後的資料(資料,起始位置,長度)

            }

            socket.Close();

        }

    }

}

Client 端：

namespace lf.socket.clientserver

{

    class Client

    { 

        static void Main(string[] args)

        {

            IPEndPoint ipont = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 20);

            //將IP位址和Port宣告為服務的連接點(Server Ip,20 Port)

            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //宣告一個Socket通訊介面(使用IPv4協定,通訊類型,通訊協定)

            server.Connect(ipont);

            //建立至遠端主機的連接

            while (true)

            {

                string input = Console.ReadLine();

                //接收輸入字串

                if (input == "exit")break;

                //若輸入exit則跳出迴圈

                byte[] data = Encoding.UTF8.GetBytes(input);

                //將字串以UTF8編碼存入緩衝區

                server.Send(data);

            }

            server.Shutdown(SocketShutdown.Both);

            //關閉遠端的傳送與接收

            server.Close();

            //關閉連接

            System.Console.Write("Disconnecting from server...");

            System.Console.ReadKey();

        }

    }

}