M

FamilyManager.SetFormula

Description:
Set the formula of a family parameter.

public void SetFormula(
	FamilyParameter familyParameter,
	string formula
)

Public Sub SetFormula ( _
	familyParameter As FamilyParameter, _
	formula As String _
)

public:
void SetFormula(
	FamilyParameter^ familyParameter, 
	String^ formula
)

Autodesk.Revit.DB.FamilyParameter

familyParameter

The family parameter.
System.String

formula

The formula string, input nulla null reference (Nothing in Visual Basic) to clean the formula of the parameter.

Autodesk.Revit.Exceptions.ArgumentNullException

Thrown when the input argument-"familyParameter"-isnullNothingnullptra null reference (Nothingin Visual Basic).
Autodesk.Revit.Exceptions.InvalidOperationException

Thrown when there is no valid family type, or the parameter cannot be assigned a formula, or the operation make a circular chain of references among the formulas.