c#socket通信客户端和服务端例子

以下是C# Socket通信客户端和服务端的例子：

服务端：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Server
{
    public static void Main()
    {
        byte[] bytes = new byte[1024];

        IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[0];
        IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);

        Socket listener = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

        try
        {
            listener.Bind(localEndPoint);
            listener.Listen(10);

            while (true)
            {
                Console.WriteLine("Waiting for a connection...");
                Socket handler = listener.Accept();
                string data = null;

                while (true)
                {
                    bytes = new byte[1024];
                    int bytesRec = handler.Receive(bytes);
                    data += Encoding.ASCII.GetString(bytes, 0, bytesRec);
                    if (data.IndexOf("<EOF>") > -1)
                    {
                        break;
                    }
                }

                Console.WriteLine("Text received : {0}", data);

                byte[] msg = Encoding.ASCII.GetBytes(data);

                handler.Send(msg);
                handler.Shutdown(SocketShutdown.Both);
                handler.Close();
            }

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }

        Console.WriteLine("\nPress ENTER to continue...");
        Console.Read();
    }
}

客户端：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Client
{
    public static void Main()
    {
        byte[] bytes = new byte[1024];

        try
        {
            IPHostEntry ipHostInfo = Dns.GetHostEntry("localhost");
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);

            Socket sender = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

            try
            {
                sender.Connect(remoteEP);

                Console.WriteLine("Socket connected to {0}", sender.RemoteEndPoint.ToString());

                byte[] msg = Encoding.ASCII.GetBytes("This is a test<EOF>");

                int bytesSent = sender.Send(msg);

                int bytesRec = sender.Receive(bytes);
                Console.WriteLine("Echoed test = {0}", Encoding.ASCII.GetString(bytes, 0, bytesRec));

                sender.Shutdown(SocketShutdown.Both);
                sender.Close();

            }
            catch (ArgumentNullException ane)
            {
                Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
            }
            catch (SocketException se)
            {
                Console.WriteLine("SocketException : {0}", se.ToString());
            }
            catch (Exception e)
            {
                Console.WriteLine("Unexpected exception : {0}", e.ToString());
            }

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }

        Console.WriteLine("\nPress ENTER to continue...");
        Console.Read();
    }
}

这里的例子中，服务端监听本机IP地址和端口11000的连接请求，客户端连接服务端并向服务端发送数据，服务端收到数据并将其原样返回给客户端。