Indicates whether an event may be cancelled by an event delegate.
Namespace:
Autodesk.Revit.DB.Events
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Syntax
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Remarks
If 'Cancellable' is true, event delegates may cancel the command that
was announced by the event. To do so, a delegate would set the 'Cancel' property to True.
Typically, post-events (e.g. DocumentPrinted) are not cancellable,
while most pre-events (e.g. DocumentPrinting) are cancellable, except for special
conditions and situations, such as when the Revit application is being closed
or if an event is raised during another event.