P

SchedulableField.ParameterId

Description:
The ID of the parameter displayed by the field.

Remarks:
Most non-calculated field types require a parameter ID. The Count field doesn't have a parameter ID.

public ElementId ParameterId { get; set; }

Public Property ParameterId As ElementId
Get
Set

public:
property ElementId^ ParameterId {
	ElementId^ get ();
	void set (ElementId^ value);
}

Autodesk.Revit.Exceptions.ArgumentNullException

When setting this property: A non-optional argument was null