Re: Win32_NetworkConnection returns empty

From: Torgeir Bakken \(MVP\) (Torgeir.Bakken-spam_at_hydro.com)
Date: 10/26/04 

Date: Tue, 26 Oct 2004 17:04:23 +0200

Dharani Babu S wrote:

> Hi all
> I am trying to find out whether a system is connected to network or not . So
> I thought ConnectionState property of Win32_NetworkConnection will give me
> the status of the system . But when I executed the ExecQuery( "select * from
> Win32_NetworkConnection " or "select ConnectionState from
> Win32_NetworkConnection ") it returns with no values . It does not return
> NULL also . Could anyone point tome the problem ? and is
> Win32_NetworkConnection the right class to find out the presence of a system
> in a network ?
Hi

Note that Win32_NetworkConnection only represents mapped drives, and
not if your system is connected to a network or not.

Some alternatives maybe:

Windows XP and beyond:

'--------------------8<----------------------
sComputerName = "." ' Use "." for local computer
Set oWMIService = GetObject("winmgmts:\\" & sComputerName & "\root\cimv2")

For Each oAdapter In oWMIService.InstancesOf("Win32_NetworkAdapter")
   If oAdapter.NetConnectionStatus = 2 Then
     WScript.Echo "Network connection """ & oAdapter.NetConnectionID _
                & """ is connected"
   End If
Next
'--------------------8<----------------------

Windows 2000 and beyond:

'--------------------8<----------------------
sComputerName = "." ' Use "." for local computer

Set oWMIService = GetObject("winmgmts:\\" & sComputerName & "\root\wmi")
Set oNicCollection = oWMIService.InstancesOf("MSNdis_MediaConnectStatus")

For Each oNic In oNicCollection
   If oNic.NdisMediaConnectStatus = 0 Then
     sNicStatus = "connected"
   Elseif oNic.NdisMediaConnectStatus = 1 Then
     sNicStatus = "disconnected"
   Else
     sNicStatus = "unknown"
   End If

   WScript.Echo "Status of " & oNic.InstanceName & ": " & sNicStatus
Next
'--------------------8<---------------------- 

-- 
torgeir, Microsoft MVP Scripting and WMI, Porsgrunn Norway
Administration scripting examples and an ONLINE version of
the 1328 page Scripting Guide:
http://www.microsoft.com/technet/scriptcenter/default.mspx

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