Prevent Auto-Expand of Nodes during Drag and Drop?

[Brendan]

I want to disable treenode auto-expansion for certain nodes when I drag a treenode .  I tried the DragOverEvent but it did not do what I wanted.  I know the Animation property was not correct, but couldn't find anything else.

     'disable expansion for nodes with values < 100
     If e.TargetNode.Value < 100 Then tvwSetup.ExpandAnimation = ExpandAnimation.None
End Sub

I've seen a solution for ASP using the "OnClientNodeExpanding" event.  Can such a thing be done in the Winforms treeview?

[Stefan]

Hi Brendan,

Thank you for writing.

You can do that by using the NodeExpandedChanging event of RadTreeView, where you can cancel the expansion if a drag operation is working:

void radTreeView1_NodeExpandedChanging(object sender, RadTreeViewCancelEventArgs e)
{
    e.Cancel = radTreeView1.TreeViewElement.DragDropService.State == RadServiceState.Working;
}

I hope that this works for you.
 
Regards,
Stefan
Telerik

[Brendan]

Thanks Stefan.  You guys are the best!