C＃TCP客户端ASCII

问题描述

我正在尝试使用Tcp Client读取服务器。要读取服务器，您需要发送命令。

命令（ASCII通讯）：

八进制001： SOH； Octet 002：访问代码： “ 0”-读取 “ 1”-需求 “ 2”-更新 八进制003： STX； Octet 004-135：用于常规通信服务器/阅读器的命令，将半字节转换为半字节，转换为包括CRC的ASCII代码； Octet 136：（ETX）； Octet 137： LRC；

简单的响应：

八进制001： STX； Octet 002-517：：对常规通信服务器/阅读器的简单响应，将半字节转换为半字节，转换为包括CRC的ASCII码； Octet 518：（ETX）； Octet 519： LRC；

我的Tcp客户端代码：

static void Connect(String server,String message)
        {
            

            try
            {                
                // Create a TcpClient.
                // Note,for this client to work you need to have a Tcpserver
                // connected to the same address as specified by the server,port
                // combination.
                Int32 port = 2180;
                
                TcpClient client = new TcpClient(server,port);                
                // Translate the passed message into ASCII and store it as a Byte array.
                Byte[] data = System.Text.Encoding.ASCII.GetBytes(message);

                // Get a client stream for reading and writing.
                //  Stream stream = client.GetStream();

                NetworkStream stream = client.GetStream();
                
                // Send the message to the connected Tcpserver.
                stream.Write(data,data.Length);
                
                Console.WriteLine("Sent: {0}",message);

                // Receive the Tcpserver.response.

                // Buffer to store the response bytes.
                //data = new Byte[256];
                data = new Byte[9];

                // String to store the response ASCII representation.
                String responseData = String.Empty;

                // Read the first batch of the Tcpserver response bytes.                
                Int32 bytes = stream.Read(data,data.Length);                
                responseData = System.Text.Encoding.ASCII.GetString(data,bytes);
                Console.WriteLine("Received: {0}",responseData);

                // Close everything.
                stream.Close();
                client.Close();
            }
            catch (ArgumentNullException e)
            {
                Console.WriteLine("ArgumentNullException: {0}",e);
            }
            catch (SocketException e)
            {
                Console.WriteLine("SocketException: {0}",e);
            }

            Console.WriteLine("\n Press Enter to continue...");
            Console.Read();
        }

我的问题是，如何转换此命令以发送到服务器？我尝试过：

Connect("192.168.0.250","0");
Connect("192.168.0.250","1");
Connect("192.168.0.250","2");

但是没有服务器响应。

解决方法

不确定，请尝试以下操作：

        try
        {
            TcpClient client = new TcpClient();
            client.Connect(server,port);
             
            byte[] data = new byte[256];
            StringBuilder response = new StringBuilder();
            NetworkStream stream = client.GetStream();
             
            do
            {
                int bytes = stream.Read(data,data.Length);
                response.Append(Encoding.UTF8.GetString(data,bytes));
            }
            while (stream.DataAvailable); // while data in stream
         
            Console.WriteLine(response.ToString());

            // close stream
            stream.Close();
            client.Close();
        }
        catch (SocketException e)
        {
            Console.WriteLine("SocketException: {0}",e);
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception: {0}",e.Message);
        }

        Console.WriteLine("End...");
        Console.Read();

您可以通过TCP聊天看到我的仓库https://github.com/AkumaWalker/ClientServer 工作：

1. 构建客户端和服务器控制台应用程序
2. 打开调试文件夹
3. 启动Server.exe
4. 启动Client.exe，然后输入名称和消息=>所有客户端和服务器将收到消息