c# - WebApi Filter Unity -

environement : unity , asp.net mvc webapi follow sample webpage http://www.asp.net/mvc/tutorials/hands-on-labs/aspnet-mvc-4-dependency-injection , after modifications, find way inject filter controler.

i used code in boostrapper.cs

var container = new unitycontainer(); container.registerinstance<ifilterprovider>("filterprovider", new    filterprovider(container)); container.registerinstance<iactionfilter>("logactionfilter", new traceactionfilter()); 

i add class filterprovider

public class filterprovider : ifilterprovider {     private iunitycontainer container;      public filterprovider(iunitycontainer container)     {         this.container = container;     }      public ienumerable<filter> getfilters(controllercontext controllercontext, actiondescriptor actiondescriptor)     {         foreach (iactionfilter actionfilter in this.container.resolveall<iactionfilter>())         {             yield return new filter(actionfilter, filterscope.first, null);         }     } } 

so each time method called called class implemented controller, can see code called in class traceactionfilter.

public class traceactionfilter : iactionfilter {     public void onactionexecuted(actionexecutedcontext filtercontext)     {         filtercontext.httpcontext.trace.write("onactionexecuted");         filtercontext.httpcontext.trace.write("action " + filtercontext.actiondescriptor.actionname);         filtercontext.httpcontext.trace.write("controller " + filtercontext.actiondescriptor.controllerdescriptor.controllername);     }      public void onactionexecuting(actionexecutingcontext filtercontext)     {                 filtercontext.httpcontext.trace.write("onactionexecuting");                 filtercontext.httpcontext.trace.write("action " + filtercontext.actiondescriptor.actionname);                 filtercontext.httpcontext.trace.write("controller " + filtercontext.actiondescriptor.controllerdescriptor.controllername);     } }  

but don't find on web, sample or right way permitting same thing : inject filter add same behavior webapi. way find add manually filter using tag, not used dependency injection. can provide help?

best regards, alexandre

[update after first answer] launch command install-package unity.aspnet.webapi permit access unityconfig. add in global.asax

    protected void application_start()     {         bootstrapper.initialise();         unitywebapiactivator.start();         configureapi(globalconfiguration.configuration); //line added          arearegistration.registerallareas();         webapiconfig.register(globalconfiguration.configuration);         filterconfig.registerglobalfilters(globalfilters.filters);         routeconfig.registerroutes(routetable.routes);         bundleconfig.registerbundles(bundletable.bundles);     } 

i add in method configureapi()

    void configureapi(httpconfiguration config)     {         var unity = new unitycontainer();         unity.registertype<productsapicontroller>();         unity.registertype<categoriesapicontroller>();          unity.registertype<iproductservice, productservice>(             new hierarchicallifetimemanager());         unity.registertype<iproductsdatabase, productsdatabase>(              new hierarchicallifetimemanager());          unity.registertype<icategorieservice, categorieservice>(             new hierarchicallifetimemanager());         unity.registertype<icategoriesdatabase, categoriesdatabase>(              new hierarchicallifetimemanager());          unity.registertype<ilogprovider, elmahprovider>(              new hierarchicallifetimemanager());          unity.registertype<irootcontroller, rootcontroller>(             new hierarchicallifetimemanager());          config.dependencyresolver = new ioccontainer(unity);          //added parts         var providers = globalconfiguration.configuration.services.getfilterproviders().tolist();         config.services.add(             typeof(system.web.http.filters.ifilterprovider),             new filter2provider(unityconfig.getconfiguredcontainer()));          var defaultprovider = providers.first(p => p system.web.http.filters.actiondescriptorfilterprovider);         config.services.remove(typeof(system.web.http.filters.ifilterprovider), defaultprovider);                 } 

when call method ...api/categoriesapi/getall breakpoint in traceactionfilter not called.

any idea? continu search.

you need create custom system.web.http.filters.filterprovider (be aware mvc has classes same names in different namespace):

public class unityactionfilterprovider      : system.web.http.filters.actiondescriptorfilterprovider,        system.web.http.filters.ifilterprovider {     private readonly iunitycontainer container;      public unityactionfilterprovider(iunitycontainer container)     {         this.container = container;     }      public new ienumerable<filterinfo> getfilters(httpconfiguration configuration,          httpactiondescriptor actiondescriptor)     {         foreach (iactionfilter actionfilter in container.resolveall<iactionfilter>())         {             // todo: determine correct filterscope             yield return new filterinfo(actionfilter, filterscope.global);         }     } } 

then need set filter provider @ startup:

var providers =      globalconfiguration.configuration.services.getfilterproviders().tolist();  globalconfiguration.configuration.services.add(     typeof(system.web.http.filters.ifilterprovider),     new unityactionfilterprovider(unityconfig.getconfiguredcontainer()));  var defaultprovider = providers.first(p => p actiondescriptorfilterprovider);  globalconfiguration.configuration.services.remove(     typeof(system.web.http.filters.ifilterprovider),      defaultprovider); 

you should use above unity bootstrapper asp.net web api

a similar question using attributes: asp.net web api - inject dependencies actionfilterattribute

since using container maintain list of filters register filterinfo directly instead of iactionfilter.