ManagementException was Caught: Invalid class - vb.net

Question

I have the following Function intended to identify the username of the user who started a specific process:
Private Function GetProcessAssociatedUserID(ByVal processName As String) As String
Dim user(1) As String
Try
Dim query As New SelectQuery(processName)
Dim searcher As New System.Management.ManagementObjectSearcher(query)
For Each process As ManagementObject In searcher.Get()
process.InvokeMethod("GetOwner", CType(user, Object()))
Next
Catch ex As Exception
End Try
Return user(0)
End Function
However somewhere in the ForEach initiation i'm getting this "ManagementException was Caught: Invalid class" exception thrown into my catch block. I've been in through debug but still cant work out what is. Any help would be much appreciated.

Answer 1

You can try it accomplishing this way
Private Function GetProcessAssociatedUserID(ByVal processName As String) As String
Dim query = "Select * from Win32_Process Where Name = """ + processName + """"
Dim searcher = New ManagementObjectSearcher(query)
Dim processList = searcher.Get()
For Each mObj As ManagementObject In processList
Dim argList As String() = {String.Empty, String.Empty}
Dim returnVal = Convert.ToInt32(mObj.InvokeMethod("GetOwner", argList))
If returnVal = 0 Then
Return argList(1) + "\\" + argList(0)
End If
Next
Return ""
End Function
This snippet works with .NET Framework 3.5 and above. For more details you may refer using-managementobjectsearcher-in-systemmanagement-is-getting-compiling-errors