C# 检测usb接入消息

在 C# 中，可以使用 System.Management 命名空间下的 ManagementEventWatcher 类来检测 USB 设备接入和拔出的消息。

以下是示例代码：

using System;
using System.Management;

namespace USBWatcher
{
    class Program
    {
        static void Main(string[] args)
        {
            WqlEventQuery query = new WqlEventQuery("SELECT * FROM __InstanceOperationEvent WITHIN 1 WHERE TargetInstance ISA 'Win32_USBControllerDevice'");
            ManagementEventWatcher watcher = new ManagementEventWatcher(query);
            watcher.EventArrived += new EventArrivedEventHandler(USBEventArrived);
            watcher.Start();
            Console.WriteLine("USB Watcher started. Press any key to stop.");
            Console.ReadKey();
            watcher.Stop();
        }

        private static void USBEventArrived(object sender, EventArrivedEventArgs e)
        {
            string eventName = e.NewEvent.ClassPath.ClassName;
            PropertyData entity = e.NewEvent.Properties["TargetInstance"];
            if (entity != null && entity.Value != null)
            {
                ManagementBaseObject targetInstance = (ManagementBaseObject)entity.Value;
                string deviceName = (string)targetInstance.Properties["Name"].Value;
                Console.WriteLine("USB device {0} was {1}", deviceName, eventName);
            }
        }
    }
}

该代码会监听 USB 设备接入和拔出事件，并打印出设备名称和事件类型。你可以根据需要对事件进行处理。