GetElementsByCategories
IEnumerable<Element> GetElementsByCategories(this RevitLinkInstance link, IEnumerable<BuiltInCategory> categories)Gets elements by multiple categories from the linked document (instances only).
Parameters
- linkRevitLinkInstance
The link instance.
- categoriesIEnumerable<BuiltInCategory>
Categories to collect.
Returns: Elements from the linked document (empty if link not loaded).
Example
var els = link.GetElementsByCategories(new[]{ BuiltInCategory.OST_Walls, BuiltInCategory.OST_Floors });