CODEWITHSUNDEEP
asp.netasp.net-mvcfilterselector
Xin
Xin

Reputation: 36490

Difference between asp.net mvc Selector and Filter?

I am confused about asp.net mvc seletor & filter.

As we know, there are 5 types of filters: authentication, authorization, action, result, exception.

However, there is another 'filter': action selector.

Base classes are different as well: ActionMethodSelectorAttribute and FilterAttribute

Can anyone tell me what is the difference between selector & common filter?

thanks.

Upvotes: 2

Views: 917

Answers (2)

Xin
Xin

Reputation: 36490

Today i just red a material which illustrate this related question.

Inside the mvc framework, it goes something like this:
----ControllerFactory
----Controller selected and instantiated (With the help of Dependency Resolver)
----Call controller.Execute(RequestContext)
--------ActionInvoker (default: ControllerActionInvoker)
--------this.ActionInvoker.InvokeAction(ControllerContext, actionName)
------------Choose the action method (action selectors involved)
------------authentication & authorization filters
------------model binding
------------invoke action with action filters
------------authentication challenge (IAuthenticationFilter)
------------Execute result with result filters
----Controller dispose

See, the selector and filter are totally in different scope, even though they both are used in actionInvoker.

Upvotes: 0

BornToCode
BornToCode

Reputation: 10213

Action selectors simply determine which action to run (e.g. by the HTTP verb used for the request).

Filters some different goals - Action Filters run code before or after an action, exception filters runs code on exception, authentication filters are used for code realted to authentication, etc.

Upvotes: 1

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