Indicates if this family parameter has an assigned value or not.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)

Syntax

C#
`public bool HasValue( FamilyParameter familyParameter )`

Visual Basic
`Public Function HasValue ( _ familyParameter As FamilyParameter _ ) As Boolean`

Visual C++
`public: bool HasValue( FamilyParameter^ familyParameter )`

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions ArgumentNullException	Thrown when the input argument-"familyParameter"-is a null reference ( Nothing in Visual Basic) .
Autodesk.Revit.Exceptions ArgumentException	Thrown if the input argument-"familyParameter"-is invalid.