Injecting Services into Filters

i followed the tutorial on the Ninject-Wiki It is driving me insane, the service inside the filter is null and won't change to an object instance. I tried property Injection and decorated the interface with the [Inject]-attribute - no results. I tried injection via constructor injection (as seen below) - the filter isn't even hit! I want to use this pattern :-(

Please for the love of god (and my sanity) help me resolve this problem!

Best regards

I have got a "BaseController", that serves as a central Baseclass for all my controllers. It is decorated with the "MyExceptionLog"-Attribute.

[MyExceptionLog] public class BaseController : Controller { //omitted for brevity }

The "MyExceptionLog" is just a empty class to mark controllers. It inherits from FilterAttribute. The filter i want to have my service injected looks as follows:

public class MyExceptionLogFilter:ActionFilterAttribute { private readonly ILogger Logger; public MyExceptionLogFilter(ILogger logger) { Logger = logger; } public override void OnActionExecuted(ActionExecutedContext filterContext) { if (filterContext.Exception != null) { Logger.Log(nameof(filterContext.Controller), filterContext.Exception, null); if (filterContext.Exception.InnerException != null) { Logger.Log(nameof(filterContext.Controller), filterContext.Exception.InnerException, null); } } } }

I use a customControllerFactory to inject services into my controllers:

public class NinjectControllerFactory : DefaultControllerFactory { public IKernel kernel; public NinjectControllerFactory() { kernel = new StandardKernel(); AddBindings(); } private void AddBindings() { kernel.Bind<IDbRepository>().To<DbRepository>(); kernel.Bind<ILogger>().To<EntLibLogger>(); kernel.BindFilter<MyExceptionLogFilter>(FilterScope.Action, 0).WhenControllerHas<MyExceptionLogAttribute>(); } protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType) { return controllerType == null ? null : (IController)kernel.Get(controllerType); } }

And finally i register the controllerFactory in my Global.Asax.cs

protected void Application_Start() { AreaRegistration.RegisterAllAreas(); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); ControllerBuilder.Current.SetControllerFactory(new NinjectControllerFactory()); }

Category:c# Views:3 Time:2019-01-06

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