RadTreeView.PreviewDragStarted Event
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RadTreeViewPreviewDragStarted Event

Note: This API is now obsolete.

Occurs before the drag is started.

Namespace: Telerik.Windows.Controls
Assembly: Telerik.Windows.Controls.Navigation (in Telerik.Windows.Controls.Navigation.dll) Version: 2018.2.515.40 (2018.2.515.40)
[ObsoleteAttribute("This event will be removed. Use DragDropManager API to customize drag drop operations.", 
public event RadTreeViewDragEventHandler PreviewDragStarted


Type: Telerik.Windows.ControlsRadTreeViewDragEventHandler
Following code fragment shows the basic usage.
void private void RadTreeView1_PreviewDragStarted(object sender, RadTreeViewDragEventArgs e)
    // get a reference to the items that has been dragged
    Collection<object> draggedItems = e.DraggedItems;

    // if the action should be canceled set Handled property to true
    e.Handled = true;
See Also