[ToolboxBitmap(typeof(FormulaExtender), "FormulaProviderV7.png")]
public class FormulaExtender : Control, IComponent, IDisposable, IParserAccessor, IUrlResolutionService, IDataBindingsAccessor, IControlBuilderAccessor, IControlDesignerAccessor, IExpressionsAccessor

<ToolboxBitmap(GetType(FormulaExtender), "FormulaProviderV7.png")>
Public Class FormulaExtender
    Inherits Control
    Implements IComponent, IDisposable, IParserAccessor, IUrlResolutionService, IDataBindingsAccessor, IControlBuilderAccessor, IControlDesignerAccessor, IExpressionsAccessor

Constructors

Name	Description
FormulaExtender()	Creates a new formula extender.

Properties

Name	Description
EnableAjaxCall	Gets or sets the automatic or manual post back when the source control value changes.
FormulaEntries	Stores the datasource of this survey.

Methods

Name	Description
AddFormula(string, string)	Adds or updates the control formula.
Calculate()	Calculates the value of all formula controls.
LoadViewState(object)	Loads the saved view state.
OnInit(EventArgs)	Adds resolvers and data providers.
OnLoad(EventArgs)	Calculates all formulas after Page_LoadComplete.
RemoveFormula(string)	Removes a control formula.
SaveViewState()	Saves the current state.
TrackViewState()	Tracks the view state.