Checking Node of a TreView Control (1 Viewer)

[gblack]

So I have a Treeview control.

When the user clicks a node, I want to check to see if that's the last child in the hierarchy (i.e. the node has a parent, but is not a parent of any other node).

Is there any easy way to do this? I still haven't wrapped my pea-brain around this recursive logic.

I've read some online articles about iterating through TV Controls, but I just want a simple check to see if the node is the last child in the hierarchy...

Any ideas?

Respectfully,
Gary

PS. A little additional wrench to throw in here is that my hierarchy isn't uniform. Meaning some hierarchical threads might only go 5 levels down, whereas some might go 7 levels deep, some 8...

 

[MarkK]

Check out the Children property of the MSComctlLib.Node, which...

Returns the number of child nodes a Node object has.

 

[Minty]

You would need to query the current tree to see if the current node has a child record. It depends how your node values are stored / calculated?

 

[gblack]

MarkK... I think that's what I need... so if MSComctlLib.Node returns zero... then it would be the last node in the hierarchy... I guess...?

 

[MarkK]

When the user clicks a node, I want to check to see if that's the last child in the hierarchy

No, you need to check the Node.Children property of the clicked node, so I would expect to see code that handles a Treeview.NodeClick event, like...

private withevents m_tvw as mscomctllib.treeview

private sub form_open(cancel as integer)
[COLOR="Green"]   'get a withevents object reference to the treeview in the control
   'so we can handle its events directly
[/COLOR]   set m_tvw = me.treeview0.object
[COLOR="Green"]   'presumably you run some kind of node creation routine here[/COLOR]
end sub

private sub m_tvw_NodeClick(nd as mscomctllib.node)
[COLOR="Green"]   'this event is raised by the treeview and gives us a reference
   'to the node that was clicked.[/COLOR]
   msgbox "the clicked node '" & nd.text & "' has " & nd.children & " children"
end sub

...so if we handle the Treeview.NodeClick() event, our handler is passed a reference to that clicked node. Then, we can very easily take a look at its properties, one of which is Children.

For tons more detailed info about these objects check them out in your object browser.