ElementIsCurveDrivenFilter Class

A filter used to match elements which are curve driven.

Inheritance Hierarchy

System.Object
  Autodesk.Revit.DB.ElementFilter
    Autodesk.Revit.DB.ElementQuickFilter
      Autodesk.Revit.DB.ElementIsCurveDrivenFilter

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)

Syntax

C#

public class ElementIsCurveDrivenFilter : ElementQuickFilter

The ElementIsCurveDrivenFilter type exposes the following members.

Constructors

	Name	Description
	ElementIsCurveDrivenFilter()	Constructs a new instance of a filter to match only curve driven elements.
	ElementIsCurveDrivenFilter(Boolean)	Constructs a new instance of a filter to match only curve driven elements, with the option to match all elements which are not curve driven elements.

Properties

	Name	Description
	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)
	IsValidObject	Specifies whether the .NET object represents a valid Revit entity. (Inherited from ElementFilter)

Methods

	Name	Description
	Dispose	(Inherited from ElementFilter)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	PassesFilter(Element)	Applies the filter to a given element. (Inherited from ElementFilter)
	PassesFilter(Document, ElementId)	Applies the filter to a given element. (Inherited from ElementFilter)
	ToString	Returns a string that represents the current object. (Inherited from Object)

Remarks

The term "curve driven" indicates that the element's Location property is a LocationCurve. Example elements found by this filter include walls, beams, and curve elements. 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.

Example

C#

// Create an ElementIsCurveDriven filter to find slanted columns(which is curve-driven) in the document,
// The term "curve driven" indicates that the element's Location property is a LocationCurve
ElementIsCurveDrivenFilter filter = new ElementIsCurveDrivenFilter();

// Apply the filter to the elements in the active document,
// Use the ElementIsCurveDrivenFilter on columns to find only slanted columns (vertical columns 
// are placed at a single point).
FilteredElementCollector collector = new FilteredElementCollector(document);
ICollection<Element> slantColumns = collector
    .WherePasses(filter).OfCategory(BuiltInCategory.OST_StructuralColumns).ToElements();

// Find elements of not curve driven: use inverted filter to match elements
ElementIsCurveDrivenFilter notCurveDrivenFilter = new ElementIsCurveDrivenFilter(true); // inverted filter
collector = new FilteredElementCollector(document);
ICollection<Element> notCurveDrivenFounds = collector.WherePasses(notCurveDrivenFilter).ToElements();

VB

' Create an ElementIsCurveDriven filter to find slanted columns(which is curve-driven) in the document,
' The term "curve driven" indicates that the element's Location property is a LocationCurve
Dim filter As New ElementIsCurveDrivenFilter()

' Apply the filter to the elements in the active document,
' Use the ElementIsCurveDrivenFilter on columns to find only slanted columns (vertical columns 
' are placed at a single point).
Dim collector As New FilteredElementCollector(document)
Dim slantColumns As ICollection(Of Element) = collector.WherePasses(filter).OfCategory(BuiltInCategory.OST_StructuralColumns).ToElements()

' Find elements of not curve driven: use inverted filter to match elements
Dim notCurveDrivenFilter As New ElementIsCurveDrivenFilter(True)
' inverted filter
collector = New FilteredElementCollector(document)
Dim notCurveDrivenFounds As ICollection(Of Element) = collector.WherePasses(notCurveDrivenFilter).ToElements()