C# 网络编程_socket实例

 

      客户端:

//发送数据:

  private void button1_Click(object sender, EventArgs e)
        {
            byte[] bytes = new byte[1024];
            Socket sk1, sk2;
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);

            sk1 = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                sk1.Connect(remoteEP);
                byte[] msg = Encoding.Unicode.GetBytes(textBox1.Text);
                int bytesSent = sk1.Send(msg);
                int bytesRec = sk1.Receive(bytes);//接收返回数据(可略)
                this.textBox2.Text= Encoding.Unicode.GetString(bytes, 0, bytesRec);
            }
            catch(Exception p)
            {
                MessageBox.Show(p.ToString());
            }

        }

 

 

服务器端:

Thread th1;

th1 = new Thread(StartListening);
th1.Start();

 

public void StartListening()
        {
            // Data buffer for incoming data.
            byte[] bytes = new Byte[1024];

            // Establish the local endpoint for the socket.
            // Dns.GetHostName returns the name of the
            // host running the application.
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);

            // Create a TCP/IP socket.
            Socket listener = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);

            // Bind the socket to the local endpoint and
            try
            {
                listener.Bind(localEndPoint);
                listener.Listen(10);

                // Start listening for connections.
                while (true)
                {
                    this.label1.Text="Waiting for a connection";
                    // Program is suspended while waiting for an incoming connection.
                    Socket handler = listener.Accept();
                    data = null;

                    // An incoming connection needs to be processed.
                        bytes = new byte[1024];
                        int bytesRec = handler.Receive(bytes);
                        data += Encoding.Unicode.GetString(bytes, 0, bytesRec);
                        string dt = data;
                        this.textBox1.Text = dt;

                    // Show the data 

                    //this.textBox1.Text = data;

                    // Echo the data back to the client.
                    byte[] msg = Encoding.Unicode.GetBytes(data);

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

            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }

        }