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ElementClassFilter Class

Element Class Filter Class

A filter used to match elements by their class.
Inheritance Hierarchy
System Object
Autodesk.Revit.DB ElementFilter
Autodesk.Revit.DB ElementQuickFilter
Autodesk.Revit.DB ElementClassFilter

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax 
public class ElementClassFilter : ElementQuickFilter

The ElementClassFilter type exposes the following members.

Constructors
Name Description
Public method ElementClassFilter(Type) Constructs a new instance of a filter to match elements by class.
Public method ElementClassFilter(Type, Boolean) Constructs a new instance of a filter to match elements by class, with the option to match all elements which are not of the given class.
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Properties
Name Description
Public property Inverted True if the results of the filter are inverted; elements that would normally be accepted by this filter will be rejected, and elements that would normally be rejected will be accepted.
(Inherited from ElementFilter )
Public property IsValidObject Specifies whether the .NET object represents a valid Revit entity.
(Inherited from ElementFilter )
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Methods
Name Description
Public method Dispose
(Inherited from ElementFilter )
Public method Equals Determines whether the specified object is equal to the current object.
(Inherited from Object )
Public method GetElementClass The class for the filter.
Public method GetHashCode Serves as the default hash function.
(Inherited from Object )
Public method GetType Gets the Type of the current instance.
(Inherited from Object )
Public method PassesFilter(Element) Applies the filter to a given element.
(Inherited from ElementFilter )
Public method PassesFilter(Document, ElementId) Applies the filter to a given element.
(Inherited from ElementFilter )
Public method ToString Returns a string that represents the current object.
(Inherited from Object )
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Remarks
This filter is a quick filter. Quick filters operate only on the ElementRecord, a low-memory class which has a limited interface to read element properties. Elements which are rejected by a quick filter will not be expanded in memory.

This filter will match elements whose class is an exact match to the input class, or elements whose class is derived from the input class.

There is a small subset of Element subclasses in the API which are not supported by this filter. These types exist in the API, but not in Revit's native object model, which means that this filter doesn't support them. In order to use a class filter to find elements of these types, it is necessary to use a higher level class and then process the results further to find elements matching only the subtype. The following types are affected by this restriction:

  • Subclasses of Autodesk.Revit.DB.Material
  • Subclasses of Autodesk.Revit.DB.CurveElement
  • Subclasses of Autodesk.Revit.DB.ConnectorElement
  • Subclasses of Autodesk.Revit.DB.HostedSweep
  • Autodesk.Revit.DB.Architecture.Room
  • Autodesk.Revit.DB.Mechanical.Space
  • Autodesk.Revit.DB.Area
  • Autodesk.Revit.DB.Architecture.RoomTag
  • Autodesk.Revit.DB.Mechanical.SpaceTag
  • Autodesk.Revit.DB.AreaTag
  • Autodesk.Revit.DB.CombinableElement
  • Autodesk.Revit.DB.Mullion
  • Autodesk.Revit.DB.Panel
  • Autodesk.Revit.DB.AnnotationSymbol
  • Autodesk.Revit.DB.Structure.AreaReinforcementType
  • Autodesk.Revit.DB.Structure.PathReinforcementType
  • Autodesk.Revit.DB.AnnotationSymbolType
  • Autodesk.Revit.DB.Architecture.RoomTagType
  • Autodesk.Revit.DB.Mechanical.SpaceTagType
  • Autodesk.Revit.DB.AreaTagType
  • Autodesk.Revit.DB.Structure.TrussType

See Also