IControllableDropHandler

Description:
An interface to be executed when custom data is dragged and dropped onto the Revit user interface. This interface is different from IDropHandler in that it allows the handler to verify whether the drop event can be executed on the given view.

Remarks:
Custom data is supported for drag and drop only during an invocation of the DoDragDrop method on Application.

public interface IControllableDropHandler : IDropHandler

Public Interface IControllableDropHandler
	Inherits IDropHandler

public interface class IControllableDropHandler : IDropHandler

type IControllableDropHandler = 
    interface
        interface IDropHandler
    end

Name	Return Type	Description	Inherited From
M CanExecute(UIDocument, Object, ElementId)	Boolean	Implement this method to inform Revit whether the drop event can be executed onto the given view.
M Execute(UIDocument, Object)	None	Implement this method to handle the drop event for your data. (Inherited from IDropHandler )	IDropHandler