c# - 同时自动检测 COM-Port 和 WriteLine

Question

你好，我只是从应用程序制作 Windows，我也在做 Arduino 项目， 我想同时自动检测 COM 端口和 WriteLine，这是我的代码...

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;


namespace ForTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string[] ports = SerialPort.GetPortNames();
            foreach (string port in ports)
            {
                comboBox1.Items.Add(port);
            }
            /// read button
            string t;
            t = comboBox1.Text.ToString();
            sErial(t);
        }

        SerialPort sp;
        void sErial(string Port_name)
        {
            sp = new SerialPort(Port_name, 9600, Parity.None, 8, StopBits.One);
            sp.Open();
            try
            {
                sp.WriteLine("G"); //send 1 to Arduino
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }


        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {

        }



    }
}

请帮助我......我现在什么都不懂......我完全失明......现在......在Arduino内部我的LED没有打开..

Answer 1

尝试将 SerialPort.Open() 放在 try-catch block 中，并在发送数据后调用 SerialPort.Close() 方法:

  void Serial(string port)
  {
      SerialPort sp = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);
      try
      {
           sp.Open();
           try
           {
               sp.WriteLine("G"); // Send 1 to Arduino
               sp.Close();
           }
           catch (Exception ex)
           {
                MessageBox.Show(ex.Message);
           }
       }
       catch (Exception e)
       {
            System.Diagnostics.Debug.WriteLine(e.Message); 
       }
  }