WMI - System.Manageme nt.ManagementEx *ception

[theintrepidfox]

Dear Group

I wonder whether anyone has some information on the cause for this
error? I've created a class for Win32_BIOS with mgmtclassgen
Win32_BIOS /L VB, added the file to my VB.NET project and tried calling
a property with the following code in a button_click event:

Dim PCBios As New ROOT.CIMV2.Win3 2.BIOS
Debug.WriteLine (PCBios.Version *)

I get the same error with other generated Win32 classes and their
properties.

The error is:
An unhandled exception of type 'System.Managem ent.ManagementE xception'
occurred in system.manageme nt.dll

Additional information: Not found

The error occurs as an example in BIOS.VB at this location in the line
(highligted green) containing the RETURN statement:
Public ReadOnly Property Version As String
Get
Return CType(curObj("V ersion"),String *)
End Get
End Property

Thanks for your help and efforts!

Martin

[theintrepidfox]

Hi Group

It looks like I solved the problem. Just for fellow folks experiencing
the same issue, here's what I've done:
Followed MSDN for 'Management Strongly Typed Class Generator
(Mgmtclassgen.e xe)'
http://msdn.microsoft.com/library/de...lassgenexe.asp

Note that there's a a little flaw in the documentation. The following
line didn't work for VB.NET and C#:
mgmtclassgen Win32_LogicalDi sk /n root\cimv2 /l VB /p c:\disk.vb

Change it to the following and it should to the trick (Note the order
of the options):
MgmtclassGen Win32_Logicaldi sk /L VB /N root\cimv2 /P c:\logicaldisk. vb

I then created a VB.NET Windows Application, referenced
System.Manageme nt.dll and added logicaldisc.vb to the assembly.

Next I did add a new class called App and pasted the following code
(with some modifications):

Imports System
Imports System.Manageme nt

Public Class App
Public Shared Sub Main()

' Initialize the instance of LogicalDisk with
' the WMI instance pointing to logical drive d:.
Dim dskC As New
MSDN_WMI_SAMPLE .ROOT.CIMV2.Win 32.Logicaldisk( New
ManagementPath( "win32_LogicalD isk.DeviceId="" c:"""))
Console.WriteLi ne("Getting Drive C: Information..." )
Console.WriteLi ne("Caption: " + dskC.Caption)
Console.WriteLi ne("SystemName : " + dskC.SystemName )
Console.WriteLi ne("VolumneName : " + dskC.VolumeName )
Console.WriteLi ne("VolumneSeri alNumber: " +
dskC.VolumeSeri alNumber)

End Sub
End Class

And finally I created a button on a form and put the following in the
click_event

App.Main()

The error is gone and I hope this example will provide some info on how
to get info from WMI. Spent hours to get it working finally!

Martin