Tests whether an element's parameter doesn't have a value.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.0.0.377)
Since: 2020

Syntax

C#
`public class HasNoValueFilterRule : ParameterValuePresenceRule`

Visual Basic
`Public Class HasNoValueFilterRule _ Inherits ParameterValuePresenceRule`

Visual C++
`public ref class HasNoValueFilterRule : public ParameterValuePresenceRule`

Inheritance Hierarchy