Would you mind providing the exact code for this please? That would help very much.

Thank you!!!

Scott

many thanks for the great coding

Steve

I may be able to help you though, I did some code modifications that fixed it for me in Windows 7 (32-bit). The reason this bug happens is because of the logic in the CacheShellIcon function. Basically it does not handle drive icons at all, but a folder icon is cached for a drive, because a drive is also a folder and so it satisfies the conditional statement.

To fix this, I modified the CacheShellIcon function to check if the path is a drive BEFORE assuming it is a folder (which would always equal true):

    Function CacheShellIcon(ByVal argPath As String) As String
        Dim mKey As String = Nothing
        ' determine the icon key for the file/folder specified in argPath
        If IO.Directory.Exists(argPath) = True Then
            If argPath = IO.Directory.GetDirectoryRoot(argPath) Then
                mKey = "drive"
            Else
                mKey = "folder"
            End If
        ElseIf IO.File.Exists(argPath) = True Then
            mKey = IO.Path.GetExtension(argPath)
        End If
        ' check if an icon for this key has already been added to the collection
        If ImageList1.Images.ContainsKey(mKey) = False Then
            ImageList1.Images.Add(mKey, GetShellIconAsImage(argPath))
            If mKey = "folder" Then ImageList1.Images.Add(mKey & "-open", GetShellOpenIconAsImage(argPath))
        End If
        Return mKey
    End Function

Special thanks to Rick who posted this fix much sooner!

First check: In the Properties for the TreeView control, make sure the ImageList property is set to ImageList1 (or whatever your ImageList is named).

When you create the TreeView UserControl per the tutorial, it encapsulates the ColorDialog and the ImageList for you, so all you need is to add the TreeView UserControl to a Windows form. Perhaps you were trying to copy the code from the UserControl’s code file into a Form’s code file, or building the TreeView directly in a Windows form, which is sort of reverse engineering the usefulness of the UserControl! I recommend that you try the UserControl because it’s re-usable.

Here’s how it works…

I added a Windows form to the TreeView project and opened it in the designer. From the Toolbox I was able to drag the TreeView UserControl straight into the Windows form and it appeared immediately (with icons) in the designer.

If you have a separate project and you wish to use the TreeView UserControl, you can add it to that project. With your new Windows form project open, in the Toolbox, right click anywhere and select “Choose Items…”, click “Browse…”, locate your TreeView UserControl’s DLL file (usually in your TreeView project’s bin/debug folder), then click “OK”. This will add “UserControl1″ to the Toolbox and you may drag it onto your Windows form.

Though, that won’t allow you to modify the internal code of the TreeView UserControl. If you want to modify it while developing a separate project without hassle, you can always add the TreeView UserControl project to your current project (via File -> Add -> Existing Project…). This will give you direct access to using the TreeView UserControl in your project from the Toolbox, as well as the ability to change your TreeView UserControl code and rebuild it. Therefore when you change your TreeView UserControl, Visual Studio will rebuild the control for you and the new one is automatically used in your current project. I have found this to be the most useful way to manage solutions with more than one custom control.

Please write back if that doesn’t help.

I’ve added Form1.vb to your project. Copied usercontrol content into Form1.vb, and in designer I added the textbox, button, treeview, imagelist, and colordialog.
The Form1 filebrowser works, but the ICONS does not show. I just have the standard + signs in the treeview.

I’m probably missing something here, Could you point me in the right direction, on using your code it in another windows form?
Thank you very much.
Per

Thanks for posting this i found it very useful as I am a beginner with VB. I found Jerrold’s post extremely useful as well. I modified the code slightly also to add each sub folder file as a node to allow everything to be seen in one viewing pane.

Thanks again,

Chris

Big thanks for the tutorial I’m building a self serve portal for users to an easier view ACL’s on folder and it’s work beautifully using DirectorySecurity and AuthorizationRuleCollection.

However in my TreeView all my icons disaply correctly for files! but for folders then all show up as the “Drive” icon…

I’m on windows 7 but issue seems different dans Oscars?

any ideas?

thanks

In your example, you can double-click to open a file… I need my program to control what happens onclick or doubleclick. Is there a way to do that? Thanks again!