AcitveDocument.Elements v. ActiveDocument.ActiveView.Elements

[rkitect]

I'm trying to get an element set from the active view using a some code from th DevTV tutorials. This works to grab an element set from the entire model:

ElementSet elems = revitApp.Create.NewElementSet();
ElementIterator iter = revitApp.ActiveDocument.Elements;
while (iter.MoveNext())



So I assumed that changing it to

ElementSet elems = revitApp.Create.NewElementSet();
ElementIterator iter = revitApp.ActiveDocument.ActiveView.Elements;
while (iter.MoveNext())



Would allow me to work from the active view element set however, I'm getting the error:

"Cannot implicitly convert type 'Autodesk.Revit.ElementSet' to 'Autodesk.Revit.ElementIterator'"

Any insight into why this happens and what the type difference between the Elements object in ActiveDocument is compared to ActiveView?



TIA,

[david.bartliff]

Because the ActiveDocument property is of type ElementIterator
From the ElementSet returned from the ActiveView, you can use ForwardIterator which returns an ElementSetIterator (note the subtle difference there as well)

[rkitect]

Thanks David. I'm slowly beginning to understand these subtle differences but your response helped complete my understanding.

[Danny Polkinhorn]

This is one of the inconsistencies with the API that drives me nuts.