Creates a filter rule that determines whether an element's parameter does not have a value.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2020

Syntax

C#
`public static FilterRule CreateHasNoValueParameterRule( ElementId parameter )`

Visual Basic
`Public Shared Function CreateHasNoValueParameterRule ( _ parameter As ElementId _ ) As FilterRule`

Visual C++
`public: static FilterRule^ CreateHasNoValueParameterRule( ElementId^ parameter )`

parameter: Type: Autodesk.Revit.DBElementId
The parameter to be evaluated by the filter.

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsArgumentNullException	A non-optional argument was null