Revit 2025 API
Parameter |
Sets the categories admitted by this filter.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax
public void SetCategories( ICollection<ElementId> categories )
Public Sub SetCategories ( categories As ICollection(Of ElementId) )
public: void SetCategories( ICollection<ElementId^>^ categories )
member SetCategories : categories : ICollection<ElementId> -> unit
Parameters
- categories ICollectionElementId

Exception | Condition |
---|---|
ArgumentNullException | A non-optional argument was null |

Testing that an element's category is a member of this set is, essentially, the first rule of the filter.
Changing the set of categories will clear any rules that use parameters that are not applicable for the new set of categories.
See Also