Question

I am trying to get dependency injection working on my action filters with property injection. I can’t figure out how to automatically set dependencies on the filters. Here is the code I have so far.

public class UnityActionInvoker : ControllerActionInvoker {     IUnityContainer container;      public UnityActionInvoker(IUnityContainer container) {         this.container = container;     }      protected override ActionExecutedContext InvokeActionMethodWithFilters(ControllerContext controllerContext, IList<IActionFilter> filters, ActionDescriptor actionDescriptor, IDictionary<string, object> parameters) {         foreach (var filter in filters) {             // HELP: dependency injection on all marked filter properties         }          return base.InvokeActionMethodWithFilters(controllerContext, filters, actionDescriptor, parameters);     } }  public class UnityControllerFactory : DefaultControllerFactory {     IUnityContainer container;      public UnityControllerFactory(IUnityContainer container) {         this.container = container;     }      protected override IController GetControllerInstance(Type controllerType) {         Controller controller = null;          if (controllerType != null) {             if (!typeof(IController).IsAssignableFrom(controllerType)) {                 throw new ArgumentException(string.Format('Type requested is not a controller: {0}', controllerType.Name), 'controllerType');             }              controller = container.Resolve(controllerType) as Controller;             controller.ActionInvoker = new UnityActionInvoker(container);         }          return controller;     } }  public class AccessFilterAttribute : FilterAttribute, IActionFilter {     [Dependency]     public IUserRepository UserRepository { get; set; }      public void OnActionExecuting(ActionExecutingContext filterContext) {         throw new NotImplementedException();     }      public void OnActionExecuted(ActionExecutedContext filterContext) {         throw new NotImplementedException();     } } 

Answer 1

The answer is:

public class UnityActionInvoker : ControllerActionInvoker {     IUnityContainer container;      public UnityActionInvoker(IUnityContainer container) {         this.container = container;     }      protected override ActionExecutedContext InvokeActionMethodWithFilters(ControllerContext controllerContext, IList<IActionFilter> filters, ActionDescriptor actionDescriptor, IDictionary<string, object> parameters) {         foreach (var filter in filters) {             container.BuildUp(filter.GetType(), filter);         }          return base.InvokeActionMethodWithFilters(controllerContext, filters, actionDescriptor, parameters);     } }