Action filter in MVC

Hi,

1.An action filter is an attribute that we can apply to a controller action  or an entire controller
 that modifies the way in which the action is executed.

•OutputCache – This action filter caches the output of a controller action for a specified amount of time.

•HandleError – This action filter handles errors raised when a controller action executes.

•Authorize – This action filter enables you to restrict access to a particular user or role.

2.ASP.NET MVC Action Filter - Caching and Compression

Caching plays a major role in developing highly scalable web applications. We can cache any http get request in the user browser for a predefined time,
if the user request the same URL in that predefined time the response will be loaded from the browser cache instead of the server.

Another important thing is compression. Now a days, all modern browsers accept compressed contents and it saves huge bandwidth.

Please check below link.

http://www.asp.net/mvc/tutorials/older-versions/controllers-and-routing/understanding-action-filters-cs
http://weblogs.asp.net/rashid/archive/2008/03/28/asp-net-mvc-action-filter-caching-and-compression.aspx

Hope this will help you.

Thanks.