Where To Implement Common functionality In Asp.net MVC

Question

I am learning Asp.net MVC 3. Just wondering, is there any way to define a method that will be executed before executing any other methods of any controllers? That means it should work like the constructor of base "Controller" class.

This will include some common functionality like checking user session/if not logged in redirect to login page, otherwise set some common values from db that will be used everywhere in the application. I want to write them only once, don't want to call a method on each controller methods.

Regards

frennky · Accepted Answer · 2011-02-10 19:42:53Z

7

That's what action filters are for. There are some already build in framework, like AuthorizeAttribute:

        [Authorize(Roles = "Admins")]
        public ActionResult Index()
        {
            return View();
        }

Edit:

Filters can be set on actions, controllers or as global filters.

[Authorize(Roles = "Admins")]
public class LinkController : Controller
{
    //...
}

Inside Global.asax

    protected void Application_Start()
    {
        GlobalFilters.Filters.Add(new AuthorizeAttribute { Roles = "Admins" });
        //...
    }

edited Feb 10, 2011 at 19:42

answered Feb 10, 2011 at 18:55

frennky

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2 Comments

Rana Over a year ago

using this, I will have to use this filer on every methods of every controllers, right? I want to avoid these steps. Basically, If I extend the 'Controller' class as MyController and create all other controllers which extends 'MyController', it should work. Is it a good solution though(i myself tried it yet, looking for experts advice)?

tpeczek Over a year ago

You can use those attributes on controller level like this: [Authorize]public class ReportsController : Controller { }, or register in your Global.asax as global for every controller: protected void Application_Start() { GlobalFilters.Filters.Add(new AuthorizeAttribute()); ... }

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