使用Windows服务和c#检测USB驱动器的插入和移除

Question

研究制作USB分布式应用程序的可能性,该应用程序
将在插入USB记忆棒时自动启动并在移除记忆棒时关闭

将使用.Net和C#.
寻找建议如何使用C#解决这个问题？

---

更新:实现此服务的两种可能解决方案.
- 覆盖WndProc
或
- 使用WMI查询与ManagementEventWatcher

Answer 1

您可以使用WMI,它很容易,并且它比WndProc解决方案的服务更好.

这是一个简单的例子:

using System.Management;

ManagementEventWatcher watcher = new ManagementEventWatcher();
WqlEventQuery query = new WqlEventQuery("SELECT * FROM Win32_VolumeChangeEvent WHERE EventType = 2");
watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
watcher.Query = query;
watcher.Start();
watcher.WaitForNextEvent();

就是这样:)

Answer 2

这对我很有用,您还可以找到有关该设备的更多信息.

using System.Management;

private void DeviceInsertedEvent(object sender, EventArrivedEventArgs e)
{
    ManagementBaseObject instance = (ManagementBaseObject)e.NewEvent["TargetInstance"];
    foreach (var property in instance.Properties)
    {
        Console.WriteLine(property.Name + " = " + property.Value);
    }
}

private void DeviceRemovedEvent(object sender, EventArrivedEventArgs e)
{
    ManagementBaseObject instance = (ManagementBaseObject)e.NewEvent["TargetInstance"];
    foreach (var property in instance.Properties)
    {
        Console.WriteLine(property.Name + " = " + property.Value);
    }
}            

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    WqlEventQuery insertQuery = new WqlEventQuery("SELECT * FROM __InstanceCreationEvent WITHIN 2 WHERE TargetInstance ISA 'Win32_USBHub'");

    ManagementEventWatcher insertWatcher = new ManagementEventWatcher(insertQuery);
    insertWatcher.EventArrived += new EventArrivedEventHandler(DeviceInsertedEvent);
    insertWatcher.Start();

    WqlEventQuery removeQuery = new WqlEventQuery("SELECT * FROM __InstanceDeletionEvent WITHIN 2 WHERE TargetInstance ISA 'Win32_USBHub'");
    ManagementEventWatcher removeWatcher = new ManagementEventWatcher(removeQuery);
    removeWatcher.EventArrived += new EventArrivedEventHandler(DeviceRemovedEvent);
    removeWatcher.Start();

    // Do something while waiting for events
    System.Threading.Thread.Sleep(20000000);
}

Answer 3

添加到VitalyB的帖子.

要引发插入任何 USB设备的事件,请使用以下命令:

var watcher = new ManagementEventWatcher();
var query = new WqlEventQuery("SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2");
watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
watcher.Query = query;
watcher.Start();

无论何时插入USB设备,都会引发事件.它甚至可以与我试图自动检测的National Instruments DAQ一起使用.

Answer 4

VitalyB的答案不包括删除设备.我更改了一下,以便在插入和删除介质时触发事件,并且还编码以获取插入介质的驱动器号.

using System;
using System.Management;

namespace MonitorDrives
{
    class Program
    {
        public enum EventType
        {
            Inserted = 2,
            Removed = 3
        }

        static void Main(string[] args)
        {
            ManagementEventWatcher watcher = new ManagementEventWatcher();
            WqlEventQuery query = new WqlEventQuery("SELECT * FROM Win32_VolumeChangeEvent WHERE EventType = 2 or EventType = 3");

            watcher.EventArrived += (s, e) =>
            {
                string driveName = e.NewEvent.Properties["DriveName"].Value.ToString();
                EventType eventType = (EventType)(Convert.ToInt16(e.NewEvent.Properties["EventType"].Value));

                string eventName = Enum.GetName(typeof(EventType), eventType);

                Console.WriteLine("{0}: {1} {2}", DateTime.Now, driveName, eventName);
            };

            watcher.Query = query;
            watcher.Start();

            Console.ReadKey();
        }
    }
}

Answer 5

以上所有答案都有点编辑:

using System.Management;

public partial class MainForm : Form
{
    public MainForm()
    {
        InitializeComponent();

        bgwDriveDetector.DoWork += bgwDriveDetector_DoWork;
        bgwDriveDetector.RunWorkerAsync();
    }

    private void DeviceInsertedEvent(object sender, EventArrivedEventArgs e)
    {
        string driveName = e.NewEvent.Properties["DriveName"].Value.ToString();
        MessageBox.Show(driveName + " inserted");
    }

    private void DeviceRemovedEvent(object sender, EventArrivedEventArgs e)
    {
        string driveName = e.NewEvent.Properties["DriveName"].Value.ToString();
        MessageBox.Show(driveName + " removed");
    }

    void bgwDriveDetector_DoWork(object sender, DoWorkEventArgs e)
    {
        var insertQuery = new WqlEventQuery("SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2");
        var insertWatcher = new ManagementEventWatcher(insertQuery);
        insertWatcher.EventArrived += DeviceInsertedEvent;
        insertWatcher.Start();

        var removeQuery = new WqlEventQuery("SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 3");
        var removeWatcher = new ManagementEventWatcher(removeQuery);
        removeWatcher.EventArrived += DeviceRemovedEvent;
        removeWatcher.Start();
    }
}

Answer 6

您也可以使用WMI来检测插入事件。它比监视WM_CHANGEDEVICE消息要复杂一些，但是它不需要窗口句柄，如果在后台作为服务运行，则该窗口句柄可能很有用。