Get Old and New Parent of a Task after Reordering via Drag and Drop
Environment
| Product Version | 2019.1 318 |
| Product | RadGanttView for WPF |
Description
How to acquire the old and new parent of a task after reorder via drag and drop.
Solution
For the purpose you can define a custom GanttDragDropBehavior and override its Drop method as follows:
protected override void Drop(SchedulingDragDropState state)
{
var task = state.DraggedItem as GanttTask;
var item = this.Gantt.ExpandCollapseService.HierarchicalCollectionAdapter.GetItemWrapperByItemKey(task);
var previousParent = item.Parent;
base.Drop(state);
var newItem = this.Gantt.ExpandCollapseService.HierarchicalCollectionAdapter.GetItemWrapperByItemKey(task);
var newParent = newItem.Parent;
}