Unable to use drag Drop in radtreeview - radtreeview

Question

I have binded all data to RadTreeView but unable to use drag-'n-drop. I used four properties as
IsDragDropEnabled="True"
IsDropPreviewLineEnabled="True"
AllowDrop="True"
IsDragPreviewEnabled="True"
and I want to drop an item within same tree. But it doesnt work.

Answer 1

There is quite a bit of info here : http://www.telerik.com/help/silverlight/raddraganddrop-events.html
But I'm also having trouble with the tree view.

Answer 2

After a quick read of this telerik article, drag-drop seems to be working quite well for me.
<telerik:RadTreeView ... EnableDragAndDrop="true" OnNodeDrop="MyTreeView_NodeDrop">
EnableDragAndDrop and OnNodeDrop seem to be the two vital pieces to getting it working, but weren't in your list of attributes you tried. HTH

Answer 3

<telerik:RadTreeView x:Name="treeView1" IsDragDropEnabled="True" Margin="2,0,0,0" ItemsSource="{Binding SelectedSectionList, Mode=TwoWay}" ItemTemplate="{StaticResource SectionTemplate}" IsEditable="True" SelectedItem="{Binding SelectedCustomSectionList, Mode=TwoWay}" Grid.Column="2">
Now in the code behind
You have to fire event
In Constructor
this.treeView1.AddHandler(RadDragAndDropManager.DropQueryEvent, new EventHandler<DragDropQueryEventArgs>(OnDropQuery), true);
Then
private void OnDropQuery(object sender, DragDropQueryEventArgs e)
{
RadTreeViewItem destinationItem = e.Options.Destination as RadTreeViewItem;
object source = this.GetItemFromPayload<object>(e.Options.Payload);
object target = destinationItem != null ? destinationItem.Item : null;
DropPosition position = destinationItem != null ? destinationItem.DropPosition : DropPosition.Inside;
if (source != null && target != null)
{
Section sourceSection = source as Section;
Section targetSection = target as Section;
Question sourceQuestion = source as Question;
Question targetQuestion = target as Question;
if (sourceQuestion != null)
{
try
{
if (sourceQuestion != null && targetQuestion != null && object.ReferenceEquals(sourceQuestion, targetQuestion))
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
if (targetQuestion != null && position == DropPosition.Inside)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
if (position != DropPosition.Inside && targetQuestion == null)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
}
catch (Exception ex)
{
}
}
}
else
{
e.QueryResult = false;
return;
}
e.QueryResult = true;
}
This is it. You will be able to drag and drop.