using System;

using System.Collections.Generic;

using System.Configuration;

using System.Linq;

using System.Web;

using System.Web.Http.Controllers;

using System.Web.Mvc;  

namespace MvcApplication3

{

    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]

    public class IDAndPriceFilterAttribute : ActionFilterAttribute

    {

        public override void OnActionExecuting(ActionExecutingContext filterContext)

        {

            base.OnActionExecuting(filterContext);

            var parameters = filterContext.ActionParameters;

            if (parameters.Keys.Contains("price"))

            {

                var price = Convert.ToInt32(parameters["price"]);

                price += ;

                parameters["price"] = price;

            }

            parameters["id"] = ;

        }

    }

}

    [IDAndPriceFilter]

    public class HomeController : Controller

    {

        public ActionResult Index(string stuName, int price,int id)

        {

            return View();

        }

    }