Help! Treeview Error

lbob · September 3rd, 2003, 05:51 AM

Thanks pgtips
Its just slow when creating the tree to start with
Lbob

pgtips · September 3rd, 2003, 06:03 AM

Hmm, probably not much you can do about it. You are creating a lot of nodes, so a With statement would speed things up by keeping a reference to the treeview nodes collection rather than having to look it up over and over again. What I mean is that instead of each line (of client-side vbs) being TreeView1.Nodes.Add(...), change it to either

Code:

With TreeView1.Nodes
   Call .Add(...)
   ...
End With

Beware though, that with isn't supported on older vbs versions, so if you're not sure what version your users have then you may be safer seeting an explicit object reference like this:

Code:

Dim xNodes
Set xNodes = Treeview1.Nodes
xNodes.Add(...)
xNodes.Add(...)
...

this will make your code run quicker, but whether you'll actually notice it is anyone's guess.

hth
Phil

lbob · September 3rd, 2003, 07:18 AM

Thanks for that.
Another question though! In VB when you use this control you have node_click. I take it, the same applies in ASP, but how?!
Sorry to be a pain
lbob

pgtips · September 3rd, 2003, 07:27 AM

Strictly speaking the events such as click have nothing to do with your asp. The treeview is running in the browser, so you must have client-side vbs to handle the click event. I don't know the exact syntax as I've never used the treeview control, but as an example, if you added this code to your client-side <script> section you'll get a message every time you click a node

Code:

Sub TreeView1_click
    MsgBox "got the click!"
End Sub

hth
Phil

lbob · September 3rd, 2003, 07:43 AM

Thanks
I've done the following to expand it and get the info out so I can process it display the node details.
Sub Treeview1_NodeClick(Node)
Treeview1.SelectedItem.Expanded = true
msgbox Treeview1.SelectedItem.Index
End Sub
Thanks for all your help, its most appeciated.
Lbob