vb.net how to check if a network drive is mapped persistently

Question

I use the following code to layout network drives on a system. I want to add a third column for persistence but in vb.net I do not know how to check if a drive has a persistent map or not. Any suggestions?

For Each drive_info As DriveInfo In DriveInfo.GetDrives()
        If drive_info.DriveType().ToString = "Network" Then
            With maps.Items.Add(drive_info.Name)
                .SubItems.Add(drive_info.DriveType().ToString)
            End With
        End If
    Next drive_info

score 3 · Accepted Answer · answered Oct 18 '09 at 22:11

You could have always done it in WMI without any (well okay fewer) nasty cludges.

e.g.

Imports System
Imports System.Management

Public Module modmain
   Sub Main()
    Dim searcher As New ManagementObjectSearcher("SELECT * FROM Win32_NetworkConnection WHERE LocalName = 'Z:'")
    Dim obj As ManagementObject
    For Each obj In searcher.Get
        Console.WriteLine("{0} {1}", obj.Item("LocalName").ToString, obj.Item("Persistent"))
    Next
   End Sub
End Module

Obviously you need to add a reference to System.Management.dll and change Z: to the drive you are checking, or you could probably replace all your code with just that snippet as removing the WHERE clause will return all mapped drives.

This does what I'm looking for, thanks. It also gives me the option to add more data in my list using the win32_NetworkConnection class, which I'm reading up on right now. — MaQleod, Oct 18 '09 at 22:51

Robert Harvey · Answer 2 · 2009-10-18T22:12:08.217

This might help you. It is a C# class that enumerates network resources, and has the ability to distinguish persistent connections:

http://www.codeproject.com/KB/cs/csenumnetworkresources.aspx?msg=964694

I apologize that it is in C#, but it does some things like marshaling memory that I don't know how to do in VB.

Constants are passed to the EnumerateServers function to provide fine control of the output. The constant you would find of interest is:

RESOURCE_REMEMBERED

Enumerates remembered (persistent) connections.

vb.net how to check if a network drive is mapped persistently

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