populating treeview with dir and files..

any method to do this in an extrememly fast way ?

with no impact on a user waiting for it to fill?

You might need to do that on different thread than the UI Thread .

A quick demo . If you have any questions , post here .

VB Code:

Public Sub FILLTreeV(ByVal path As String)
        Dim FitN As TreeNode
        Dim DitN As TreeNode
 
        For Each file As String In IO.Directory.GetFiles(path)
            FitN = New TreeNode(file)
            Me.TreeView1.Nodes.Add(FitN)
        Next
 
        For Each dir As String In IO.Directory.GetDirectories(path)
            DitN = New TreeNode(dir)
            Me.TreeView1.Nodes.Add(DitN)
            FILLTreeV(dir)
        Next
 
    End Sub
 
 
'Use 
 
FILLTreeV("c:\data")

and also had a thought - what if i just populated all the directories -

i reworked your code to populate the tree with the directories only and that is fast ! and looks like the whole file structure is there - just what i want - but

then if a user clicks on the node to see the insides of the directory then i would populate that on the fly -

how would i do that? is there an event so i can fill in the files or (subdirectories) under the correct node of the tree?

That's easy I think . I'll give you the idea , if you still can't get it to work then let me know (I'm just little busy now) . Ok , use a counter that increments folders found then use this counter as index in the treenode index value . I remember I did it this way and worked well . Sorry as I said I can't give you the full code right now but if you're stuck , then I'll help you .

Just what I was looking for.