[VB2005] UInt32 reading/setting value problem

[ProclaimDragon]

I'm trying to read an UInt32 value from WMI (Win32_NetworkAdapterConfiguration) but I'm getting some exception...

Here's the VB code:

Imports System.Management

Public Class Form1

	Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
		Dim mc As New ManagementClass("Win32_NetworkAdapterConfiguration")
		Dim moc As ManagementObjectCollection = mc.GetInstances

		For Each mo As ManagementObject In moc
			If mo("Caption").Equals("[00000010] Marvell Yukon 88E8036 PCI-E Fast Ethernet Controller") Then
				TextBox1.Text = mo("InterfaceIndex")
			End If
		Next
	End Sub
End Class

Here's the exception:

  Quote

System.Management.ManagementException was unhandled

Message="Not found "

Source="System.Management"

StackTrace:

at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)

at System.Management.PropertyData.RefreshPropertyInfo()

at System.Management.PropertyDataCollection.get_Item(String propertyName)

at System.Management.ManagementBaseObject.GetPropertyValue(String propertyName)

at System.Management.ManagementBaseObject.get_Item(String propertyName)

at WindowsApplication1.Form1.Form1_Load(Object sender, EventArgs e) in C:\Documents and Settings\Nazgulled\Local Settings\Application Data\Temporary Projects\WindowsApplication1\Form1.vb:line 11

at System.EventHandler.Invoke(Object sender, EventArgs e)

at System.Windows.Forms.Form.OnLoad(EventArgs e)

at System.Windows.Forms.Form.OnCreateControl()

at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

at System.Windows.Forms.Control.CreateControl()

at System.Windows.Forms.Control.WmShowWindow(Message& m)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at System.Windows.Forms.ContainerControl.WndProc(Message& m)

at System.Windows.Forms.Form.WmShowWindow(Message& m)

at System.Windows.Forms.Form.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)

at System.Windows.Forms.Control.SetVisibleCore(Boolean value)

at System.Windows.Forms.Form.SetVisibleCore(Boolean value)

at System.Windows.Forms.Control.set_Visible(Boolean value)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.Run(ApplicationContext context)

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

at WindowsApplication1.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81

at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)

at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

The exception happens at this line: TextBox1.Text = mo("InterfaceIndex").

It also happens if I try something like:

Dim val As UInt32
val = mo("InterfaceIndex")

Replacing TextBox1.Text = mo("InterfaceIndex") with val = mo("InterfaceIndex").

How can I access this? I need to save the interface index to a variable so I can compare network interfaces between Win32_NetworkAdapterConfiguration and Win32_NetworkAdapter.

Here's some interesting links:

MSDN: Win32_NetworkAdapterConfiguration

MSDN: Win32_NetworkAdapter

Edited July 3, 2006 by Nazgulled

[ProclaimDragon]

Nevermind... after a lot of search and a bit of luck I found something about association between those 2 WMI classes and came up with something like this:

Dim mos As ManagementObjectSearcher

		mos = New ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = True")

		For Each moConfig As ManagementObject In mos.Get
			mos = New ManagementObjectSearcher("ASSOCIATORS OF " + "{Win32_NetworkAdapterConfiguration.Index='" + _
			moConfig("Index").ToString + "'}" + " WHERE AssocClass=Win32_NetworkAdapterSetting")

			For Each moAdapter As ManagementObject In mos.Get()
				If moAdapter("Caption").Equals("[00000010] Marvell Yukon 88E8036 PCI-E Fast Ethernet Controller") Then
					TextBox1.Text = moAdapter("NetConnectionID")
					TextBox1.Text = TextBox1.Text + ControlChars.CrLf + moConfig("MACAddress")
				End If
			Next
		Next

But if you guys know a better way to do this, just let me hear it...