Converting VBscript to VB.NET help

thebatfink

Well-known member
Joined
Mar 29, 2012
Messages
47
Programming Experience
Beginner
Hi, I have some code which I found for turning off a wireless connection when a wired lan connection is made (for use on my laptop). It works great as a vbscript but I am trying to re-write it in VB.NET so that I can create a Windows Service with Visual Studio and have it running as a service. I'm currently trying to replicate it in a console application but its complaining when it runs. I think maybe because the vbscript is passed arguments (the network connection names) in the command line and these are of object type. I'm trying to hard code these in and they are string values, but I'm not sure so any help would be much appreciated. Heres the code (commented out the original lines)..

VB.NET:
Imports System.Threading
Module Module1
    Sub Main()
        Dim bCurrentStatus
        Dim bChanged
        Dim sWatchNetworkCard
        Dim sSwitchNetworkCard
        'If (WScript.Arguments.Count < 2) Then
        '    WScript.Echo "*********************************"
        '    WScript.Echo "* IntelliAdmin Net Switcher     *"
        '    WScript.Echo "* [url=http://www.intelliadmin.com]Remote Administration For Windows[/url]   *"
        '    WScript.Echo "*********************************"
        '    WScript.Echo vbCrLf & "Usage: " & vbCrLf
        '    WScript.Echo " NetSwitch.vbs <Card To Watch> <Card To Switch>"
        '    WScript.Echo vbCrLf & "Explanation: " & vbCrLf
        '    WScript.Echo " Net Switcher can be used to make sure your"
        '    WScript.Echo " wireless card is only enabled when no "
        '    WScript.Echo " ethernet connection is available"
        '    WScript.Echo vbCrLf & "Example: " & vbCrLf
        '    WScript.Echo " NetSwitch.vbs " & Chr(34) & "Local Area Connection" & Chr(34) & " " & _
        '        Chr(34) & "Wireless Connection" & Chr(34)
        '    WScript.Quit()
        'End If
        'sWatchNetworkCard = WScript.Arguments(0)
        'sSwitchNetworkCard = WScript.Arguments(1)
        sWatchNetworkCard = "Local Area Connection"
        sSwitchNetworkCard = "Wireless Network Connection"
        If (Not (AdapterExists(sWatchNetworkCard))) Then
            Console.WriteLine("Error: Could not find the adapter (" & sWatchNetworkCard & ")")
            'WScript.Echo "Error: Could not find the adapter (" & sWatchNetworkCard & ")"
            'WScript.Quit()
        End If
        If (Not (AdapterExists(sSwitchNetworkCard))) Then
            Console.WriteLine("Error: Could not find the adapter (" & sSwitchNetworkCard & ")")
            'WScript.Echo "Error: Could not find the adapter (" & sSwitchNetworkCard & ")"
            'WScript.Quit()
        End If
        bChanged = True
        While (True)
            If (bChanged) Then
                bChanged = False
                bCurrentStatus = AdapterStatus(sWatchNetworkCard)
                If (bCurrentStatus) Then
                    EnableAdapter(sSwitchNetworkCard, False)
                Else
                    EnableAdapter(sSwitchNetworkCard, True)
                End If
            End If
            'WScript.Sleep(1000))
            Thread.Sleep(1000)
            If (bCurrentStatus <> AdapterStatus(sWatchNetworkCard)) Then
                bChanged = True
            End If
        End While
    End Sub
    '*********************************************
    '* Net Switcher - Watches one network card   *
    '* for connectivity, and toggles another     *
    '* [url=http://www.intelliadmin.com]Remote Administration For Windows[/url]               *
    '*********************************************
    Sub EnableAdapter(sAdapterName, bStatus)
        Dim objWMIService, colItems
        objWMIService = GetObject("winmgmts:\\.\root\cimv2")
        colItems = objWMIService.ExecQuery("Select * from Win32_NetworkAdapter", , 48)
        For Each objItem In colItems
            If (UCase(Trim(objItem.NetConnectionID)) = UCase(Trim(sAdapterName))) Then
                If (bStatus) Then
                    objItem.Enable()
                Else
                    objItem.Disable()
                End If
            End If
        Next
    End Sub
    Function AdapterStatus(sAdapterName)
        Dim objWMIService, colItems
        objWMIService = GetObject("winmgmts:\\.\root\cimv2")
        colItems = objWMIService.ExecQuery("Select * from Win32_NetworkAdapter", , 48)
        AdapterStatus = False
        For Each objItem In colItems
            If (UCase(Trim(objItem.NetConnectionID)) = UCase(Trim(sAdapterName))) Then
                AdapterStatus = (objItem.NetConnectionStatus = 2)
            End If
        Next
    End Function
    Function AdapterExists(sAdapterName)
        Dim objWMIService, colItems
        objWMIService = GetObject("winmgmts:\\.\root\cimv2")
        colItems = objWMIService.ExecQuery("Select * from Win32_NetworkAdapter", , 48)
        AdapterExists = False
        For Each objItem In colItems
            If (UCase(Trim(objItem.NetConnectionID)) = UCase(Trim(sAdapterName))) Then
                AdapterExists = True
            End If
        Next
    End Function
End Module

It errors here

VB.NET:
If (Not (AdapterExists(sWatchNetworkCard))) Then

Unhandled Exception: System.Runtime.InteropServices.COMException: Unspecified error
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
at System.Runtime.InteropServices.CustomMarshalers.EnumerableViewOfDispatch.GetEnumerator()
at System.Collections.IEnumerable.GetEnumerator()
at ConsoleApplication1.Module1.AdapterExists(Object sAdapterName) in C:\Users\JMTAYLOR\AppData\Local\Temporary Projects\ConsoleApplication1\Module1.vb:line 101
at ConsoleApplication1.Module1.Main) in C:\Users\JMTAYLOR\AppData\Local\Temporary Projects\ConsoleApplication1\Module1.vb:line 32

Any pointers would be much appreciated!!! Thanks!
 

thebatfink

Well-known member
Joined
Mar 29, 2012
Messages
47
Programming Experience
Beginner
Well after an afternoon of mass googling and trial and error.. Here is the solution for anyone thats interested..

VB.NET:
Imports System.Threading
Imports System.Management
Module Module1
    Sub Main()
        Dim bCurrentStatus As Boolean
        Dim bChanged As Boolean = True
        Dim sWatchNetworkCard As String
        Dim sSwitchNetworkCard As String
        sWatchNetworkCard = "Local Area Connection"
        sSwitchNetworkCard = "Wireless Network Connection"
        If Not AdapterExists(sWatchNetworkCard) Then
            Console.WriteLine("Error: Could not find the adapter (" & sWatchNetworkCard & ")")
        End If
        If (Not (AdapterExists(sSwitchNetworkCard))) Then
            Console.WriteLine("Error: Could not find the adapter (" & sSwitchNetworkCard & ")")
        End If
        Do
            If bChanged = True Then
                bChanged = False
                bCurrentStatus = AdapterStatus(sWatchNetworkCard)
                If bCurrentStatus = True Then
                    EnableAdapter(sSwitchNetworkCard, False)
                Else
                    EnableAdapter(sSwitchNetworkCard, True)
                End If
            End If
            Thread.Sleep(1000)
            If (bCurrentStatus <> AdapterStatus(sWatchNetworkCard)) Then
                bChanged = True
            End If
        Loop
    End Sub
    Sub EnableAdapter(sAdapterName As String, bStatus As Boolean)
        Dim wmiQuery = New SelectQuery("Select * from Win32_NetworkAdapter")
        Using searcher = New ManagementObjectSearcher(wmiQuery)
            For Each item As ManagementObject In searcher.[Get]()
                If UCase(Trim(DirectCast(item("NetConnectionId"), [String]))) = UCase(Trim(sAdapterName)) Then
                    If bStatus = True Then
                        item.InvokeMethod("Enable", Nothing)
                    Else
                        item.InvokeMethod("Disable", Nothing)
                    End If
                End If
            Next
        End Using
    End Sub
    Function AdapterStatus(sAdapterName As String) As Boolean
        AdapterStatus = False
        Dim wmiQuery = New SelectQuery("Select * from Win32_NetworkAdapter")
        Using searcher = New ManagementObjectSearcher(wmiQuery)
            For Each item As ManagementObject In searcher.[Get]()
                If UCase(Trim(DirectCast(item("NetConnectionId"), [String]))) = UCase(Trim(sAdapterName)) Then
                    If item("NetConnectionStatus") = 2 Then
                        AdapterStatus = True
                    End If
                End If
            Next
        End Using
    End Function
    Function AdapterExists(sAdapterName As String) As Boolean
        AdapterExists = False
        Dim wmiQuery = New SelectQuery("Select * from Win32_NetworkAdapter")
        Using searcher = New ManagementObjectSearcher(wmiQuery)
            For Each item As ManagementObject In searcher.[Get]()
                If UCase(Trim(DirectCast(item("NetConnectionId"), [String]))) = UCase(Trim(sAdapterName)) Then
                    'Console.WriteLine(item("NetConnectionId"))
                    AdapterExists = True
                End If
            Next
        End Using
    End Function
End Module
 
Top