DataSourceActionAttribute Class

This is an attribute class, which extends the mvc FilterAttribute. It should be put on top of a controller's method, which should return JSON (even though in the user code it will return Action Result). If that attribute is used for FunnelChart or Sparkline, then only fields used by those charts are passed to client. Otherwise, all data are passed to client: similar to Controller.Json(data)

'Declaration
 
Public Class DataSourceActionAttribute 
   Inherits System.Web.Mvc.FilterAttribute

public class DataSourceActionAttribute : System.Web.Mvc.FilterAttribute