C# TCP/IP短连接

----IP Service ------


----IP Client------


----IP Service Major code------

C# code

 private void BeginListen()
        {
            serverIP = IPAddress.Parse(tbxIP.Text);
            serverFullAddr = new IPEndPoint(serverIP, int.Parse(tbxPort.Text));//设置IP，端口
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //指定本地主机地址和端口号
            sock.Bind(serverFullAddr);
            lbxMessage.Invoke(new SetTextCallback(SetText), "启动成功 时间:"+DateTime.Now, 1);
            byte[] message = new byte[1024];
            string mess = "";
            while (true)
            {
                try
                {
                    sock.Listen(5);//设置监听频率
                    Socket newSocket = sock.Accept();//阻塞方式
                    int bytes=  newSocket.Receive(message);//接收数据
                    mess = Encoding.Default.GetString(message, 0, bytes);//对接收字节编码（S与C 两端编码格式必须一致不然中文乱码）（当接收的字节大于1024的时候 这应该是循环接收，测试就没有那样写了）
                    //do
                    //{
                    //    bytes = newSocket.Receive(message, message.Length, 0);
                    //    mess = mess + Encoding.ASCII.GetString(message, 0, bytes);
                    //}
                   // while (bytes > 0);

                    lbxMessage.Invoke(new SetTextCallback(SetText),mess,1);//子线程操作主线程UI控件
                    mess = "已接收数据： " + mess + " 当前时间为：" + DateTime.Now;
                    newSocket.Send(Encoding.Default.GetBytes(mess));//想客户端发送数据

                }
                catch (SocketException se)
                {
                    lbxMessage.Invoke(new SetTextCallback(SetText), mess, 1);

                }
            }
        }

----IP Clinet Major code------

C# code

  //发送消息
        private void btnSend_Click(object sender, EventArgs e)
        {
            serverFullAddr = new IPEndPoint(serverIP, int.Parse(tbxPort.Text));//设置IP，端口
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //指定本地主机地址和端口号
            sock.Connect(serverFullAddr);
            byte[] byteSend = System.Text.Encoding.Default.GetBytes(this.tbxMessage.Text);
            byte[] message = new byte[1024];
            string mess = "";
            int bytes = 0;
            try
            {
                //发送数据
                sock.Send(byteSend);
               
                bytes = sock.Receive(message);//接收数据
                mess = mess + Encoding.Default.GetString(message,0,bytes);//编码（当接收的字节大于1024的时候 这应该是循环接收，测试就没有那样写了）
                //do
                //{
                //    bytes = newSocket.Receive(message, message.Length, 0);
                //    mess = mess + Encoding.ASCII.GetString(message, 0, bytes);
                //}
                // while (bytes > 0);
                tbxMessage.Text = mess; 
            }
            catch (Exception ex)
            {
                lblError.Text = "出现错误，请联系管理员";
            }
            sock.Close();
        }

-----------------------------TCP Demo---------------------------------------

----TCP Service ------


----TCP Client------


----TCP Service code ------

C# code

  static void Main(string[] args)
        {
            TcpListener listener = null;
            int portNum = 9001;
            byte[] bytes = new byte[1024];
            try
            {
                Console.WriteLine("开启服务器端窗口。。。。");
                Console.WriteLine("请等待连接...");
                bool done = false;
                listener = new TcpListener(IPAddress.Parse("127.0.0.1"), portNum);
                listener.Start();//开始监听

                while (!done)
                {
                    TcpClient client = listener.AcceptTcpClient();

                    Console.WriteLine("连接成功........");
                    NetworkStream ns = client.GetStream();
                    int num=ns.Read(bytes,0,bytes.Length);//读C端发送的数据
                    Console.WriteLine(Encoding.ASCII.GetString(bytes, 0, num));//编码
                    byte[] byteTime = Encoding.ASCII.GetBytes(DateTime.Now.ToString());

                    try
                    {
                        ns.Write(byteTime, 0, byteTime.Length);//像C端发送数据
                        ns.Close();
                        client.Close();
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e.ToString());
                    }
                }

                listener.Stop();
            }
            catch (Exception ee)
            {
                Console.Write("错误提示：" + ee.Message);
            }
            finally
            {
                // Stop listening for new clients.
                listener.Stop();
            }
            Console.WriteLine("/nHit enter to continue...");
            Console.Read();
        }

----TCP Client code ------

C# code

 private void btnSend_Click(object sender, EventArgs e)
        {
            tcpC = new TcpClient("127.0.0.1", port);
            ntkS = tcpC.GetStream();//返回用于发送和接收数据的 NetworkStream
       
            byte[] myWriteBuffer = Encoding.ASCII.GetBytes(tbxMessage.Text);
            if (ntkS.CanWrite)// 获取一个值，该值指示 NetworkStream 是否支持写入。 
            {
                ntkS.Write(myWriteBuffer, 0, myWriteBuffer.Length);//将数据写入 NetworkStream 
                ntkS.Flush();
            }
            if (ntkS.CanRead)// 获取一个值，该值指示 NetworkStream 是否支持读。 
            {
                ntkS.Read(bytes, 0, bytes.Length);//读取NetworkStream中数据。
                tbxMessage.Text = Encoding.ASCII.GetString(bytes);
                ntkS.Flush();
            }
            ntkS.Close();
            tcpC.Close();
           
        }