Socket TCP CS

using System; using System.Collections.Generic; using System.Text; using System.Net; using System.Net.Sockets; using System.Threading; namespace server {     class Program     {         static void Main(string[] args)         {             int port = 2000;             string host = "127.0.0.1";

            ///创建终结点（EndPoint）             IPAddress ip = IPAddress.Parse(host);//把ip地址字符串转换为IPAddress类型的实例             IPEndPoint ipe = new IPEndPoint(ip, port);//用指定的端口和ip初始化IPEndPoint类的新实例

            ///创建socket并开始监听             Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个socket对像，如果用udp协议，则要用SocketType.Dgram类型的套接字             s.Bind(ipe);//绑定EndPoint对像（2000端口和ip地址）             s.Listen(0);//开始监听             Console.WriteLine("等待客户端连接");             while (true)             {                 ///接受到client连接，为此连接建立新的socket，并接受信息                 Socket temp = s.Accept();//为新建连接创建新的socket                 new Thread(new ThreadStart(delegate                 {                     String strServer = temp.LocalEndPoint.ToString();                     String strClient = temp.RemoteEndPoint.ToString();                     Console.WriteLine("建立连接：{0}<={1}", strServer, strClient);                     string recvStr = "";                     byte[] recvBytes = new byte[1024];                     int bytes;                     bytes = temp.Receive(recvBytes, recvBytes.Length, 0);//从客户端接受信息                     recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);

                    ///给client端返回信息                     Console.WriteLine("server get message:{0}", recvStr);//把客户端传来的信息显示出来                     string sendStr = "ok!Client send message successful!";                     byte[] bs = Encoding.ASCII.GetBytes(sendStr);                     temp.Send(bs, bs.Length, 0);//返回信息给客户端                     temp.Close();                 })).Start();

            }             s.Close();             Console.ReadLine();         }

    } }

using System; using System.Collections.Generic; using System.Text; using System.Net; using System.Net.Sockets; namespace Client {     class Program     {         static void Main(string[] args)         {             try             {                 int port = 2000;                 string host = "127.0.0.1";                 ///创建终结点EndPoint                 IPAddress ip = IPAddress.Parse(host);                 //IPAddress ipp = new IPAddress("127.0.0.1");                 IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndpoint实例

                ///创建socket并连接到服务器                 Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建Socket                 ///                 bool a = false;                 if (!a)                 {                     port = 2002;                     host = "127.0.0.1";                     ///创建终结点（EndPoint）                     ip = IPAddress.Parse(host);//把ip地址字符串转换为IPAddress类型的实例                     IPEndPoint ipe_client = new IPEndPoint(ip, port);//用指定的端口和ip初始化IPEndPoint类的新实例                               c.Bind(ipe_client);//绑定EndPoint对像（2001端口和ip地址）                 }                 //                 Console.WriteLine("Conneting…");                 c.Connect(ipe);//连接到服务器

                ///向服务器发送信息                 string sendStr = "hello!This is a socket test";                 byte[] bs = Encoding.ASCII.GetBytes(sendStr);//把字符串编码为字节                 Console.WriteLine("Send Message");                 c.Send(bs, bs.Length, 0);//发送信息

                ///接受从服务器返回的信息                 string recvStr = "";                 byte[] recvBytes = new byte[1024];                 int bytes;                 bytes = c.Receive(recvBytes, recvBytes.Length, 0);//从服务器端接受返回信息                 recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);                 Console.WriteLine("client get message:{0}", recvStr);//显示服务器返回信息                 ///一定记着用完socket后要关闭                 c.Close();             }             catch (ArgumentNullException e)             {                 Console.WriteLine("argumentNullException: {0}", e);             }             catch (SocketException e)             {                 Console.WriteLine("SocketException:{0}", e);             }             Console.WriteLine("Press Enter to Exit");         }     } }