topic Re: Get FamilySymbol from Elements in ActiveView in Revit API Forum

Get FamilySymbol from Elements in ActiveView

luisdavid.mena — Wed, 29 Sep 2021 21:24:48 GMT

Hello
I'm trying to get FamilySymbol from an active 3D View using FilteredElementCollector. But I'm getting null values.

FilteredElementCollector elements = new FilteredElementCollector(doc, doc.ActiveView.Id).OfClass(typeof(FamilySymbol)).OfCategory(BuiltInCategory.OST_StructuralFoundation);

Attached is the screenshot of the elements(StructuralFoundation) that I'm trying to get.
Any help would be very appreciated.

Re: Get FamilySymbol from Elements in ActiveView

RPTHOMAS108 — Wed, 29 Sep 2021 21:37:51 GMT

FamilySymbols are an ElementType and as such don't appear in the view themselves.

Filter instead for FamilyInstances then from there use Element.GetTypeId on the resulting elements.

Could also use FamilyInstance.Symbol if you've cast the elements returned from the filter to FamilyInstance.

Re: Get FamilySymbol from Elements in ActiveView

ridaabderrahmane — Wed, 29 Sep 2021 21:50:48 GMT

FilteredElementCollector familySymbols = new FilteredElementCollector(doc, doc.ActiveView.Id).OfClass(typeof(FamilySymbol)).OfCategory(BuiltInCategory.OST_StructuralFoundation).Cast<FamilyInstance>().Select(e=>e.Symbol).ToList():;

Re: Get FamilySymbol from Elements in ActiveView

guillain.jolivet — Thu, 30 Sep 2021 09:25:21 GMT

I'm actually working on something like that and didn't find out how to do it with just a FilteredElementCollector...

So far, I find every single type name of structural foundation in the view, then i collect every StructuralFoundation element type in the document and iterate it and compare the ElementType name with type names i found in the view. And add it to a new list.

List<string> object_types_in_view = new FilteredElementCollector(doc, doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_StructuralFoundation).WhereElementIsNotElementType().ToElements().Select(el => el.Name).Distinct().ToList(); object_types_in_view.Sort(); ICollection<Element> object_types = new FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_StructuralFoundation).WhereElementIsElementType().ToElements(); List<ElementType> Types_in_view = new List<ElementType>(); foreach (ElementType el_ty in object_types) { if (object_types_in_view.Contains(el_ty.Name)) { Types_in_view.Add(el_ty); } }

It's maybe not the best way to achieve it but it works!

Re: Get FamilySymbol from Elements in ActiveView

RPTHOMAS108 — Thu, 30 Sep 2021 10:25:39 GMT

If you incorporate GetTypeId you can avoid dealing with strings:

IList<ElementId> object_typeIds_in_view = new FilteredElementCollector(IntDoc, IntDoc.ActiveView.Id) .OfCategory(BuiltInCategory.OST_StructuralFoundation) .WhereElementIsNotElementType() .ToElements().Select(el => el.GetTypeId()).Distinct().ToList(); IList<Element> object_types_in_view = new FilteredElementCollector(IntDoc, object_typeIds_in_view) .WhereElementIsElementType().ToElements();

Re: Get FamilySymbol from Elements in ActiveView

luisdavid.mena — Thu, 30 Sep 2021 16:48:17 GMT

Thank you !
But I don't want a list by every instance. What I need is a list of the existing types in the model. 😞

Re: Get FamilySymbol from Elements in ActiveView

guillain.jolivet — Thu, 30 Sep 2021 17:00:38 GMT

@luisdavid.menaI don't understand. Both solutions give you family types existing in the active view. It's not what you are looking for?

Re: Get FamilySymbol from Elements in ActiveView

luisdavid.mena — Thu, 30 Sep 2021 18:43:40 GMT

@ridaabderrahmane , @guillain.jolivet, @RPTHOMAS108 . Thank you for your help but I'm still getting null values.

This is what I'm trying inside a Macro:

//Get Document Document doc = this.ActiveUIDocument.Document; UIApplication uiapp = new UIApplication(Application); UIDocument uidoc = this.ActiveUIDocument; //FOUNDATION TYPES IList<ElementId> object_typeIds_in_view = new FilteredElementCollector(doc, doc.ActiveView.Id).OfCategory(BuiltInCategory.OST_StructuralFoundation).WhereElementIsNotElementType().ToElements().Select(el=>el.GetTypeId()).Distinct().ToList(); IList<Element> object_types_in_view = new FilteredElementCollector(doc, object_typeIds_in_view).WhereElementIsNotElementType().ToElements(); //Show result string message; message = "Name of Types : "; foreach(Element elem in object_types_in_view) message += "\n" + elem.Name; TaskDialog.Show("Result","Number of elements : " + object_types_in_view.Count() + "\n" + message);

Also the taskDialog within my model, which is a Central Model, not linked models.

Re: Get FamilySymbol from Elements in ActiveView

luisdavid.mena — Thu, 30 Sep 2021 19:35:56 GMT

Hello. I'm sorry. It was just that in the second collector I used WhereElementIsNotElementType() instead of WhereElementIsElementType() 😮
The topic is solved !

Thank you