System.Web.Mvc.ActionFilterAttribute vs System.Web.Http.Filters.ActionFilterAttribute

Question

i see that there are two version of ActionFilterAttribute class.
System.Web.Mvc.ActionFilterAttribute and System.Web.Http.Filters.ActionFilterAttribute

what is different?

McGarnagle · Accepted Answer · 2012-09-26 20:22:23Z

41

The System.Web.Http one is for Web API; the System.Web.Mvc one is for previous MVC versions.

You can see from the source that the Web API version has several differences.

It has OnResultExecuting and OnResultExecuted handlers ("Called by the ASP.NET MVC framework before/after the action result executes.")
It can be executed asynchronously
It does not let you specify an order of execution

edited Sep 26, 2012 at 20:22

answered Sep 26, 2012 at 16:37

McGarnagle

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1 Comment

Filip W Over a year ago

Actually, it's the Mvc filter that can have an order specified and Web API one can't

MushinNoShin · Accepted Answer · 2012-09-26 18:15:10Z

6

System.Web.Mvc.ActionFilterAttribute is intended for use with ASP.NET MVC. System.Web.Http.Filters.ActionFilterAttribute is intended for use with ASP.NET Web API.

MVC is web applications, Web API is HTTP services.

Their msdn pages are System.Web.Mvc.ActionFilterAttribute and System.Web.Http.Filters.ActionFilterAttribute

edited Sep 26, 2012 at 18:15

answered Sep 26, 2012 at 16:35

MushinNoShin

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