Question

我希望在插入/删除/启用/禁用USB设备时收到通知。我正在为Win32_USBControllerDevice注册“__InstanceOperationEvent”。

问题是虽然我收到了所有设备的插入/删除通知。我只为USB存储设备获得启用/禁用事件。

我做错了什么？

提前致谢

Answer 1

如果不提供代码示例或告诉我们您使用的是哪种语言，就很难掌握您所说的内容。

Win32_USBController类是Win32_PnPEntity类的关联器，它具有所有USB设备的实例，而不管其类型如何。因此，此类的__InstanceOperationEvent为所有设备提供通知，而不仅仅是USB存储设备。更合适的是，它适用于任何兼容PnP的USB设备。

以下脚本是用VBScript编写的概念点。当设备连接或断开连接时，它会通知您所有USB组件。我测试了USB存储设备，USB鼠标和键盘，以及我周围的各种其他设备。所有这些都有效。我在Vista x64上测试过，但这适用于任何版本的Windows。

vbscript示例：

strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")

Set colEvents = objWMIService.ExecNotificationQuery _
    ("Select * From __InstanceOperationEvent Within 1 " _
        & "Where TargetInstance Isa 'Win32_USBControllerDevice'")

While True
    Set objEvent = colEvents.NextEvent

    Select Case objEvent.Path_.Class
    Case "__InstanceCreationEvent"
        strOutput = "Device inserted:" & vbCr
    Case "__InstanceDeletionEvent"
        strOutput = "Device removed:" & vbCr
    Case Default
        strOutput = objEvent.Path_.Class & vbCr
    End Select

    strDeviceName = objEvent.TargetInstance.Dependent
    strDeviceName = Replace(strDeviceName, Chr(34), "")
    arrDevicePart = Split(strDeviceName, "=")
    strDeviceName = arrDevicePart(1)

    Set colUSBDevices = objWMIService.ExecQuery _
        ("Select * From Win32_PnPEntity Where DeviceID = '" & strDeviceName & "'")
    For Each objUSBDevice in colUSBDevices
        strOutput = strOutput & objUSBDevice.Description & vbCr
    Next

    WScript.Echo strOutput
Wend

确定何时启用或禁用设备类似但有一些明显的差异。您将需要使用Win32_PnPEntity类，它基本上是所有已安装的PnP设备的枚举。您需要关注每个实例的ConfigManagerErrorCode属性。此提供包含与您在设备管理器的设备状态部分中找到的信息相同的信息。您可以看到为什么在任何给定设备上观看此功能会有用。当设备更改为显示正常操作的代码（0）时，我们可以安全地假设已启用设备。当此代码更改为代码22时，我们知道设备已被禁用。（所有其他代码表示错误状态。）__InstanceModificationEvent是监视Win32_PnPEntity类的任何实例中的更改的不错选择。

如果您对可能的错误代码感兴趣，可以在脚本开头附近的WScript.Echo语句中枚举所有可能的值。

vbscript示例：

Const wbemFlagUseAmendedQualifiers = &H20000

strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")

Set objPnPEntityClass = objWMIService.Get("Win32_PnPEntity", wbemFlagUseAmendedQualifiers)
arrValues = objPnPEntityClass.properties_("ConfigManagerErrorCode").qualifiers_("values")
valueMap = objPnPEntityClass.properties_("ConfigManagerErrorCode").qualifiers_("valuemap")

WScript.Echo "Gathering Device Manager error codes..."
Set dictErrorCodes = CreateObject("Scripting.Dictionary")
For i = 0 to Ubound(arrValues)
    dictErrorCodes.add valueMap(i), arrValues(i)
    '  0, This device is working properly.
    ' 22, This device is disabled.
Next

Set objPnPEntityClass = Nothing

WScript.Echo "Setting up event notification..."
Set colEvents = objWMIService.ExecNotificationQuery _
    ("Select * From __InstanceModificationEvent Within 1 " _
        & "Where TargetInstance Isa 'Win32_PnPEntity'")

WScript.Echo "Waiting..."
While True
    Set objEvent = colEvents.NextEvent
    Set objDevice = objEvent.TargetInstance

    Select Case objDevice.ConfigManagerErrorCode
    Case 0      ' This device is working properly.
        strOutput = objDevice.Caption & " is working properly." & vbCr
    Case 22     ' This device is disabled.
        strOutput = objDevice.Caption & " has been disabled." & vbCr
    Case Default
        strDeviceStatus = arrValues(objDevice.ConfigManagerErrorCode)
        strOutput = "(" & objDevice.Caption & ") " &  strDeviceStatus & vbCr
    End Select

    WScript.Echo strOutput
Wend

Answer 2

Win32_PnPEntity 确实适用于我的USB指纹扫描仪设备。但它不会选择未安装驱动程序的设备。我正在给我的代码也许我的代码存在一些问题。

static void Main(string[] args)
    {
        WqlEventQuery weqQuery = new WqlEventQuery();
        weqQuery.EventClassName = "__InstanceOperationEvent";
        weqQuery.WithinInterval = new TimeSpan(0, 0, 3);
        weqQuery.Condition = @"TargetInstance ISA 'Win32_PnPEntity'";

        ManagementEventWatcher m_mewWatcher = new ManagementEventWatcher(weqQuery);
        m_mewWatcher.EventArrived += new EventArrivedEventHandler(m_mewWatcher_EventArrived);

        m_mewWatcher.Start();
        m_mewWatcher1.Start();
        Console.ReadLine();
    }
    static void m_mewWatcher_EventArrived(object sender, EventArrivedEventArgs e)
    {

        bool bUSBEvent = false;

        foreach (PropertyData pdData in e.NewEvent.Properties)
        {
            try
            {
                ManagementBaseObject mbo = (ManagementBaseObject)pdData.Value;
                if (mbo != null)
                {
                    foreach (PropertyData pdDataSub in mbo.Properties)
                    {
                        Console.WriteLine("pdDataSub.Name= " + pdDataSub.Name + " and pdDataSub.Value.ToString() = " + (pdDataSub.Value == null ? "" : pdDataSub.Value));
                    }
                }
            }
            catch (Exception ex)
            {
            }
        }
    }

禁用某些设备时，请不要获取__InstanceOperationEvent

2 个答案: