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Namespace: Autodesk.Revit.DB Class: FamilyManager

FamilyManager.AddParameter(ExternalDefinition, ForgeTypeId, Boolean)

Method
Description:
Add a new shared parameter to the family.
Remarks:
This method can work even without any family type, but it cannot be assigned the value via FamilyManager.Set methods when there is no current type.
Syntax
public FamilyParameter AddParameter(
	ExternalDefinition familyDefinition,
	ForgeTypeId groupTypeId,
	bool isInstance
)
Parameters
Parameter Type Description
familyDefinition ExternalDefinition The definition of the loaded shared parameter.
groupTypeId ForgeTypeId The identifier of the parameter group to which the family parameter belongs.
isInstance Boolean Indicates if the new parameter is instance or type.
Return Value
Type Description
FamilyParameter If creation was successful the new shared parameter is returned, otherwise an exception with failure information will be thrown.
Exceptions
Exception Condition
ArgumentException Thrown when the input parameter group cannot be assigned to the new parameter.
InvalidOperationException Thrown when the shared family parameter creation is not supported. Or trying to add an instance parameter of image type.