How to select all instances of family in Revit?

Question

I am creating a plugin for Revit 2019 and want to select all the instances of specific family and type through API. "ElementClassFilter" is available in Revit sdk to filter the elements but I want to display all instances of same type in blue lines. I have filtered the specific type through "ElementClassFilter" but looking for how to select them in revit through API.

The following code is for filtering elements of specific family and type.

ElementClassFilter filter = new ElementClassFilter(typeof(FamilyInstance));
FilteredElementCollector collector = new FilteredElementCollector(document);
collector.WherePasses(filter);
var query = from element in collector where element.Name == "Single-Standard" select element;

List<FamilyInstance> familyInstances = query.Cast<FamilyInstance>().ToList<FamilyInstance>();

But I want to show all instances of same family and type in the following image

"Window: Single-Standard" image

as I understand, you want to have the selection in the revit interface, once you press your plugin button? like an automatic selection plugin? — DomCR
– DomCR, Commented Apr 24, 2019 at 6:13

DomCR · Accepted Answer · 2019-04-24 07:09:31Z

1

UIApplication UIapp = commandData.Application;
UIDocument UIdoc = UIapp.ActiveUIDocument;
Document doc = UIdoc.Document;

FilteredElementCollector elementCollector = new FilteredElementCollector(doc);
elementCollector.OfClass(typeof(FamilyInstance));

Selection sel = UIdoc.Selection;
sel.SetElementIds(elementCollector.ToList().Select(o => o.Id).ToList()); //User selection

This is a simple example to how to set the user selection. For mor info of revit Selection class you can visit this link.

answered Apr 24, 2019 at 7:09

DomCR

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