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AddParameter Method (String, ForgeTypeId, Category, Boolean)

Family Manager Add Parameter(String, Forge Type Id, Category, Boolean) Method

Add a new family type parameter to control the type of a nested family within another family.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax 
public FamilyParameter AddParameter(
	string parameterName,
	ForgeTypeId groupTypeId,
	Category familyCategory,
	bool isInstance
)

Parameters

parameterName String
The name of the new family parameter.
groupTypeId ForgeTypeId
The identifier of the group to which the family parameter belongs.
familyCategory Category
The category to which the new family parameter binds.
isInstance Boolean
Indicates if the new family parameter is instance or type.

Return Value

FamilyParameter
If creation was successful the new parameter is returned, otherwise an exception with failure information will be thrown.
Exceptions
Exception Condition
ArgumentNullException Thrown when the input argument-"parameterName"-is .
ArgumentException Thrown when the input argument-"parameterName"-is already in use, or the input parameter group cannot be assigned to the new parameter, or the input argument-"familyCategory"-is illegal to bind with parameter.
InvalidOperationException Thrown when the required family of familyCategory is not existing in current document, , or when the creation failed. Or trying to add an instance parameter of image type.
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.
See Also