I want to drag 3 TextBlock from one user control and want to create textblock with same content in other user control.
So i am adding drag event is different textblocks of first user control and drop events in a grid of second user control.
First time when i am dropping an item it is working fine.
From next item onwards it is showing me arrow line which it has drawn while dropping first item.
My code is:
//UserControl2
private void OnDropInfo(object sender, DragDropEventArgs e)
{
if ( e.Options.Status==DragStatus.DropComplete)
{
//Code for custom processing
}
}
void OnDropQuery(object sender, DragDropQueryEventArgs e)
{
e.QueryResult =
true;
}
//UserControl1
void OnDragInfo(object sender, DragDropEventArgs e)
{
}
protected virtual void OnDragQuery(object sender, DragDropQueryEventArgs e)
{
TextBlock labelItem = e.Options.Source as TextBlock;
e.Options.Payload = labelItem;
ContentControl cue = new ContentControl();
StackPanel spanel = new StackPanel();
spanel.Children.Add(
new TextBlock(){Text =labelItem.Text});
cue.Content =spanel;
e.Options.DragCue = cue;
e.Options.ArrowCue =
RadDragAndDropManager.GenerateArrowCue();
e.QueryResult =
true;
}
Please provide me some sample code to fix this.
2 Answers, 1 is accepted
i noticed that you are generating an ArrowCue each time the OnDragQuery() fires, can you try generating it only when the status of the drag/drop operation is DragQuery instead, like so:
protected virtual void OnDragQuery(object sender, DragDropQueryEventArgs e){ if (e.Options.Status == DragStatus.DragQuery) { TextBlock labelItem = e.Options.Source as TextBlock; e.Options.Payload = labelItem; ContentControl cue = new ContentControl(); StackPanel spanel = new StackPanel(); spanel.Children.Add(new TextBlock() { Text = labelItem.Text }); cue.Content = spanel; e.Options.DragCue = cue; e.Options.ArrowCue = RadDragAndDropManager.GenerateArrowCue(); } e.QueryResult = true;}Please give this approach a try and let me know if it works for you.
Best wishes,
Tina Stancheva
the Telerik team
Rank 1
It Works.