Find Hidden View References

Not really sure where I found this, but it finds viewreferences that are hidden in the view.

public void FindSection()

{

UIDocument uidoc = this.ActiveUIDocument; //dont need this

Document doc = this.ActiveUIDocument.Document;

// Get the element selection of current document

Selection selection = uidoc.Selection;

//store element id's

ICollection<ElementId> selectedIds = uidoc.Selection.GetElementIds();

View view = uidoc.ActiveView ;

/*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>();

*/

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());

}

}

//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;

// }

//}

}