Creating the Custom Action Filter Attribute

In this article we are going to see how to create a custom action filter attribute, For this we have to derive from the ActionFilterAttribute or its derived class. In this sample we are going to implement a Cache settings through the web.config and specify the cache profile name in the action filter to load for that particular action.


Filter :

    public class PartialCacheAttribute:OutputCacheAttribute

    {

        public PartialCacheAttribute(string cacheprofilename)

        {

            OutputCacheSettingsSection section = (OutputCacheSettingsSection)ConfigurationManager.GetSection("system.web/caching/outputCacheSettings");

            OutputCacheProfile profile =   section.OutputCacheProfiles["2Mcache"];

            Duration = profile.Duration;

            VaryByParam = profile.VaryByParam;

        }

    }

              

Controller:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using EFSample.Models;

using EFSample.Filters;

namespace EFSample.Controllers

{

    [Authorize]  

    [NoCache]

    public class EmployeeController : Controller

    {

        Models.EmpModel mod = new Models.EmpModel();

        public ActionResult Create()

        {

            return View();

        }

       

        public ActionResult Index()

        {

            List<EMPTABLE> result = mod.GetEmployees();

            return View(result);

        }

        [ChildActionOnly]

        [PartialCache("childprofile")]

        public ActionResult Child()

        {

            return View();

        }

       

        public ActionResult Details(int id)

        {

            EMPTABLE result = mod.GetEmployee(id);

            return View(result);

        }

    }

}

Web.Config

<system.web>

    <caching>

      <outputCacheSettings>

        <outputCacheProfiles>

          <add name="2Mcache" duration="120" varyByParam="None"/>

        </outputCacheProfiles>

      </outputCacheSettings>

    </caching>

</system.web>

   

Now from the code that the action child is cached to the system for 120 seconds, it takes the settings from the web.config.

From this article I hope you can learn how to implement the action filters in the ASP.NET MVC.