Finding Hidden Elements

[jmyr]

Hi all,

I'm trying to unhide elements (Unreferenced Callouts to be specific) but for some reason i cant find hidden elements using code below. Any idea what's wrong? Thanks

 IEnumerable<ElementId> refCallouts = new FilteredElementCollector(doc)
                .OfCategory(BuiltInCategory.OST_Viewers)
                .WhereElementIsNotElementType()
                .Where(x =>
                x.IsHidden(view) &&
                x.get_Parameter(BuiltInParameter.ID_PARAM).AsElementId() != view.Id &&
                GetViewFromMarker(x, doc).ViewType == ViewType.DraftingView &&
                x.get_Parameter(BuiltInParameter.VIEWER_SHEET_NUMBER).AsString() != "---")
                .Select(x => x.Id)
                .Cast<ElementId>();

                foreach (ElementId elementId in refCallouts)
                {
                    MessageBox.Show(elementId.ToString());
                }
              
            }
            public static View GetViewFromMarker(Element element, Document doc)
            {
                ElementId elementId = element.get_Parameter(BuiltInParameter.ID_PARAM).AsElementId();
                Element getElement = doc.GetElement(elementId);

                if (getElement is View view)
                {
                    return view;
                }
                else
                {
                    return null;
                }
            }

[stever66 · Accepted solution]

The code below seems to be enough to retrieve the hidden section views, so I'm not sure what all the other filters are for.  I'd suggest trying to get the code  below to work, and then adding the other items you want one at a time.  Start simple and work your way up to the more complex.

View view = uidoc.ActiveView ;
				IEnumerable<ElementId> refCallouts = new FilteredElementCollector(doc)
                .OfCategory(BuiltInCategory.OST_Viewers)
					.WhereElementIsNotElementType().Where(x =>x.IsHidden(view))
				.Select(x => x.Id)
                .Cast<ElementId>();
			
                foreach (ElementId elementId in refCallouts)
                {
                    TaskDialog.Show("Revit", elementId.ToString());
                }