Enabling / Disabling network card exception

kevinn7

Below is my code which enables and disables all network cards in my PC.

It works fine but when I execute this code on a normal User Account, i get the exception " Unable to read beyond the end of the stream" .

Im also aware that as a normal user, one will not be able to enable and disable network cards. I tried changing the settings in gpedit.msc bt it still doesnt work.

How do I grant permission to the user so that he wud b able to disable and enable the network card using the code below?

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 Dim strComputer As String

        Dim coladapters As Object

        strComputer = "."

        objWmiService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")

        coladapters = objWmiService.Execquery("Select * from Win32_NetworkAdapter Where NetEnabled='false'")

        For Each Adapter In coladapters

            Adapter.enable()

        Next

Plater

You might be able to change the user you use to get into the WMI calls.
(Is there a reason you are not using the .NET WMI implimentation for this?

kevinn7

ok im kinda lost.. i thought i was? lol

mind showing me how it'll be like if i were to use the .net wmi?

Plater

Def not. Take a look at the System.Management namespace. (You will have to add the assembly reference, it doesn't come added)

I threw this together from what I read on msdn:

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Public Shared Function DoStuff() As Integer

    Try

        Dim classInstance As New ManagementObject("root\CIMV2","Win32_NetworkAdapter",Nothing)
 
        Dim outParams As ManagementBaseObject = classInstance.InvokeMethod("Enable", Nothing, Nothing)

        'Dim outParams As ManagementBaseObject = classInstance.InvokeMethod("Disable", Nothing, Nothing)
 
        ' List outParams

        Console.WriteLine("Out parameters:")

        Console.WriteLine("ReturnValue: {0}", outParams("ReturnValue"))
 
    Catch err As ManagementException

        MessageBox.Show("An error occurred while trying to execute the WMI method: " & err.Message)

    End Try

End Function

kevinn7

nice.. ill give tht a try. thx alot. yr help is much appreciated. =)

Plater

I also recommend the "WMI Code Creator" for fiddling with WMI. It has a little gui that creates the code for you, let you see how it all works.

Enabling / Disabling network card exception

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