Managed WMI Event class is not an event class???
- by galets
I am using directions from here: http://msdn.microsoft.com/en-us/library/ms257351(VS.80).aspx to create a managed event class. Here's the code that I wrote:
[ManagementEntity]
[InstrumentationClass(InstrumentationType.Event)]
public class MyEvent
{
[ManagementKey]
public string ID { get; set; }
[ManagementEnumerator]
static public IEnumerable<MyEvent> EnumerateInstances()
{
var e = new MyEvent() { ID = "9A3C1B7E-8F3E-4C54-8030-B0169DE922C6" };
return new MyEvent[] { e };
}
}
class Program
{
static void Main(string[] args)
{
var thisAssembly = typeof(Program).Assembly;
var wmi_installer = new AssemblyInstaller(thisAssembly, null);
wmi_installer.Install(null);
wmi_installer.Commit(null);
InstrumentationManager.RegisterAssembly(thisAssembly);
Console.Write("Press Enter...");
Console.ReadLine();
var e = new MyEvent() { ID = "A6144A9E-0667-415B-9903-220652AB7334" };
Instrumentation.Fire(e);
Console.Write("Press Enter...");
Console.ReadLine();
wmi_installer.Uninstall(null);
}
}
I can run a program, and it properly installs. Using wbemtest.exe I can browse to the event, and "show mof":
[dynamic: ToInstance, provider("WmiTest,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")]
class MyEvent
{
[read, key] string ID;
};
Notice, the class does not inherit from __ExtrinsicEvent, which is weird...
I can also run select * from MyEvent, and get the result. Instrumentation.Fire() also returns no error. However, when I'm trying to subscribe to event using "Notification Query" option, I'm getting 0x80041059
Number: 0x80041059
Facility: WMI
Description: Class is not an event class.
What am I doing wrong, and is there a correct way to create managed WMI event?
