What are Filters in MVC?

Authorization filters: Performs authentication and authorizes before executing action method. Action filters : Performs some operation before and after an action method executes. Result filters : Performs some operation before or after the execution of view result. Exception filters : Performs some operation if there is an unhandled exception thrown during the execution of the ASP.NET MVC pipeline.

ASP.NET MVC framework supports the following action filters: Action Filters: Action filters are used to implement logic that gets executed before and after a controller action executes. We will look at Action Filters in detail in this chapter. Authorization Filters: Authorization filters are used to implement authentication and authorization for controller actions. Result Filters: Result filters contain logic that is executed before and after a view result is executed. For example, you might want to modify a view result right before the view is rendered to the browser. Exception Filters: Exception filters are the last type of filter to run. You can use an exception filter to handle errors raised by either your controller actions or controller action results. You can also use exception filters to log errors.