C three ways to realize socket data reception

Stream.Read Method

When overridden in a derived class , Reads a sequence of bytes from the current stream , And raise the position in this stream by the number of bytes read .

grammar ：

public abstract int Read(byte[] buffer, int offset, int count)

Parameters ：

• buffer: Byte array . When this method returns , The buffer contains the specified character array , Of the array  offset  and (offset + count -1) The values between are replaced by bytes read from the current source .

• offset: buffer  Zero based byte offset in , From here, the data read from the current stream is stored .

• count: The maximum number of bytes to read from the current stream .

Return value ：

The total number of bytes read into the buffer . If the number of bytes currently available is not as many as the number of bytes requested , The total number of bytes may be less than the number of bytes requested , Or if you have reached the end of the stream , It's zero (0).

remarks ：

The implementation of this method reads the most from the current stream  count  Bytes , And store them from  offset  At the beginning  buffer  in . The current position in the stream raises the number of bytes read ; however , If there is an anomaly , The current position in the stream remains unchanged . The implementation returns the number of bytes read . Only if the position is currently at the end of the stream , The return value is zero . If there is no data available , The implementation will block until at least one byte of data is readable . Only if there is no more data in the stream , And no more data is needed （ Such as closed socket or end of file ） when ,Read  To return to 0. Even if the end of the stream has not been reached , The implementation is still free to return less than the requested bytes .

Previously, the following methods were generally used for data reception ：

int recv;// Define the receive data length variable 
            IPEndPoint ipEnd = new IPEndPoint(IPAddress.Parse(textBox1.Text), int.Parse(textBox2.Text));
            // Interface monitored by the receiver ,ip It can also be used. IPAddress.Any
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            // Initialize a Socket object 
            socket.Bind(ipEnd);// Bind socket to a IP Address and a port (bind());
            socket.Listen(10);
            while (true)
            {
                byte[] data = new byte[1024];// Yes data Zero clearing 
                Socket clientSocket = socket.Accept(); // Once the connection is accepted , Create a client 
                recv = clientSocket.Receive(data);
                if (recv == 0) // If the received data length is less than 0, The exit 
                    break;
                string stringData = "0x" + BitConverter.ToString(data).Replace("-", " 0x").ToLower();
                                                                                                                  
                this.Invoke((EventHandler)delegate
                {
                    richTextBox1.Text += DateTime.Now.ToString("yy-MM-dd hh:mm:ss")  + stringData + "\n";
                });
            }

I didn't find any problems when I used it before , But today, when testing the data reception of metal door, I found that data will be lost , The metal door gives me data every ten seconds , Use the above one almost 60 Seconds to receive a set of data , For the above problems , The following changes have been made ：

Put the data reception into while (true), Data reception is normal .

The following three methods are used to realize the normal reception of data , The code is as follows ：

  test ：

 Task.Run(() => {}); This can be removed ;