ListBoxDragDropBehavior-Identify Approach

[Kishorekumar]

Hi All,

Any Idea to Notify in Drop(DragDropState state) of which Parent Class is ListBoxDragDropBehavior. I am Doing Drag and Drop operation in Rad:ListBox Control. Need to identify whether I am Dragging the ListBoxItem from top to down or down to top in Drop(DragDropState state  method of the behavior. I have attached a sample image(dragvisual.jpg) for reference.

Thanks in Advance!

Regards,

Kishore Kumar

[Dinko | Tech Support Engineer]

Hi Kishorekumar,

Thank you for the attached image.

To check if you are going down or up, you can subscribe to the DragOver event of the DragDropManager. You can get the current possible drop point in the event handler and check if it is above the center of the RadListBox or below. You can check the attached project for further reference.

Regards,
Dinko
Progress Telerik

[Kishorekumar]

Hi Dinko,

The above sample which you attached determines the dragging-approach whether top to bottom or bottom to top in View(code-behind). I need it in Drop(DragDropState state) method of Custom(ListBoxbehaviour-dragDrop) behavior for further Validation/restrictions. Can you provide solution  for this problem.

[Dinko | Tech Support Engineer]

Hi Kishorekumar,

You can create a property in the business object that will hold the current drag state. To get the drag object in the DragOver event, you can use the DragDropPayloadManager.GetDataFromObject() method. I have modified the project to demonstrate this approach.

I hope this approach will work for you.

Regards,
Dinko
Progress Telerik