在C#中获取新连接的USB设备的COM端口(串口)

using System;
using System.Management;

public class USBWatcher
{
    private ManagementEventWatcher watcher;

    public void StartWatching()
    {
        WqlEventQuery query = new WqlEventQuery("SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2 or EventType = 3");
        watcher = new ManagementEventWatcher(query);
        watcher.EventArrived += new EventArrivedEventHandler(USBEventArrived);
        watcher.Start();
    }

    public void StopWatching()
    {
        if (watcher != null)
        {
            watcher.Stop();
            watcher.Dispose();
        }
    }

    private void USBEventArrived(object sender, EventArrivedEventArgs e)
    {
        ManagementBaseObject instance = (ManagementBaseObject)e.NewEvent["TargetInstance"];
        string eventType = (string)e.NewEvent["EventType"];

        if (eventType == "2") // USB设备连接事件
        {
            string deviceName = (string)instance["Name"];
            string comPort = GetCOMPort(deviceName);

            Console.WriteLine("USB设备已连接：{0}，COM端口：{1}", deviceName, comPort);
        }
        else if (eventType == "3") // USB设备断开事件
        {
            string deviceName = (string)instance["PreviousInstanceName"];
            string comPort = GetCOMPort(deviceName);

            Console.WriteLine("USB设备已断开：{0}，COM端口：{1}", deviceName, comPort);
        }
    }

    private string GetCOMPort(string deviceName)
    {
        // 在这里编写获取COM端口的逻辑
        // 可以使用System.IO.Ports.SerialPort类来获取已连接的串口设备信息

        return "COM1"; // 假设返回COM1端口
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        USBWatcher usbWatcher = new USBWatcher();
        usbWatcher.StartWatching();

        Console.WriteLine("正在监听USB设备连接和断开事件，请按任意键退出...");
        Console.ReadKey();

        usbWatcher.StopWatching();
    }
}