Logic Filters

Overview

Logic filters allow joining several fast and/or slow filters to be considered together or individually.

Types

1. LogicalAndFilter

   • Elements must pass all existing filters.
   • Example:

   categoryFilter = ElementCategoryFilter(BuiltInCategory.OST_StructuralColumns)
   classFilter = ElementClassFilter(FamilyInstance)
   Filter = LogicalAndFilter(categoryFilter, classFilter)
   Columns = FilteredElementCollector(doc).WherePasses(Filter).ToElements()

2. LogicalOrFilter

   • Elements must pass at least one of the existing filters.
   • Example:

   Columns = ElementCategoryFilter(BuiltInCategory.OST_StructuralColumns)
   Foundations = ElementCategoryFilter(BuiltInCategory.OST_StructuralFoundation)
   Filter = LogicalOrFilter(Columns, Foundations)
   Foundat = FilteredElementCollector(doc).WherePasses(Filter).ToElements()