GridDataSourceActionAttribute Class

this is an attribute class which extends the mvc FilterAttribute. It should be put on top of the controller method that should return JSON (even though in the user code it will return Action Result). The idea of this filter is to transform the ActionResult into a JsonResult instance, taking into account all Request params such as paging, sorting, and filtering. Since MVC doesn't have ViewState, we will need to infer all the features from the request itself, that's the only information we have regarding any previous state.

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

public class GridDataSourceActionAttribute : System.Web.Mvc.FilterAttribute