在放置或移除钥匙时获取USB唯一ID

Question

我需要在放置/移除USB时获得唯一的USB ID(不是卷序列号).但在所有情况下,"PNPDeviceID"始终为空.我使用的代码是:

static void Main(string[] args)
{ 
    const string QUERY = @"select * from __InstanceOperationEvent within 1 where TargetInstance isa 'Win32_LogicalDisk' and (TargetInstance.DriveType=2)"; 
    Program p = new Program(); 
    ManagementEventWatcher w = new ManagementEventWatcher(new WqlEventQuery(QUERY));
    w.EventArrived += new EventArrivedEventHandler(p.OnWMIEvent); 
    w.Start();
    Console.ReadKey();
    w.Stop();
}

public void OnWMIEvent(object sender, EventArrivedEventArgs e)
{
    PropertyData p = e.NewEvent.Properties["TargetInstance"]; 
    if (p != null) 
    {
        ManagementBaseObject mbo = p.Value as ManagementBaseObject;
        PropertyData deviceid = mbo.Properties["DeviceID"]; 
        PropertyData drivetype = mbo.Properties["DriveType"];
        PropertyData driveSerial = mbo.Properties["VolumeSerialNumber"];
        PropertyData driveGUID = mbo.Properties["PNPDeviceID"];

        Console.WriteLine("{0}-{1}", "DeviceID",deviceid.Value); 
        Console.WriteLine("{0}-{1}", "DriveType",drivetype.Value);
        Console.WriteLine("{0}-{1}", "DriveSerial", driveSerial.Value);
        Console.WriteLine("{0}-{1}", "driveGUID", driveGUID.Value);
        Console.WriteLine();
    }
} 

来源是:这个

我可以使用以下代码获得UNIQUE USB ID:

ManagementObjectSearcher theSearcher = 
    new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive WHERE InterfaceType='USB'");

foreach(ManagementObject currentObject in theSearcher.Get())
{
    Console.WriteLine("{0}-{1}", "PNPDeviceID", currentObject.Properties["PNPDeviceID"].Value);            
}

那么请你告诉我如何在我放/取USB棒时将它们组合起来接收PNPDeviceId(USB GUID)

Answer 1

如果直接查询该类Win32_LogicalDisk并且没有获取该PNPDeviceID属性的值，则在 wmi 事件内部使用此类时也不会获取值。相反，您可以将Win32_DiskDrive类与__InstanceOperationEvent内部事件一起使用。

Select * From __InstanceOperationEvent Within 1 Where TargetInstance ISA 'Win32_DiskDrive' and TargetInstance.InterfaceType='USB'