WinForms Serial Port Communication Guide

In Winform applications, serial port communication data processing typically involves the following steps:

1. Open the serial port: Instantiate a serial port object using the SerialPort class, set the properties of the port (such as baud rate, data bits, stop bits, parity, etc.), and then call the Open() method to open the serial port.
2. Send data: Use the Write() method of the SerialPort object to send data to the serial port.
3. Data reception: When data is received on the serial port, the DataReceived event is triggered, allowing for the reading of the received data in the event handler.
4. Data processing: Analyzing and handling the received data according to communication protocols, including splitting, converting, and verifying the data based on its format.
5. Display data: Present the processed data on the interface, using controls such as Label, TextBox, etc.
6. To close the serial port: When exiting the application, call the Close() method of the SerialPort object to close the serial port.

Below is a simple example code demonstrating how to handle serial communication data in a Winform application.

using System;
using System.IO.Ports;

namespace SerialPortCommunication
{
    public partial class Form1 : Form
    {
        private SerialPort serialPort;

        public Form1()
        {
            InitializeComponent();

            serialPort = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
            serialPort.DataReceived += SerialPort_DataReceived;

            try
            {
                serialPort.Open();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error opening serial port: " + ex.Message);
            }
        }

        private void SerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            string data = serialPort.ReadExisting();

            // 数据处理
            // 在这里对接收到的数据进行处理，如解析、转换、验证等操作

            // 显示数据
            Invoke(new Action(() =>
            {
                textBox1.Text = data;
            }));
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 发送数据
            serialPort.Write("Hello, World!");
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            base.OnFormClosing(e);

            // 关闭串口
            if (serialPort.IsOpen)
            {
                serialPort.Close();
            }
        }
    }
}

The example code above demonstrates how to use serial communication in a Winform application and handle data. In actual applications, data processing and display operations need to be carried out based on specific needs and communication protocols.