Exception Filters MVC - Dependency Injection - asp.net-mvc

Question

I am not getting logger instance in OnException method. I am using IunityContainer and have initialized in Global.asax
Please help me to correct the code.
Thanks
public class InjectIntoActionInvoker : ControllerActionInvoker
{
private IUnityContainer _container;
public InjectIntoActionInvoker(IUnityContainer container)
{
_container = container;
}
protected override ActionExecutedContext InvokeActionMethodWithFilters(
ControllerContext controllerContext,
IList<IActionFilter> filters,
ActionDescriptor actionDescriptor,
IDictionary<string, object> parameters)
{
foreach (IActionFilter filter in filters)
{
_container.BuildUp(filter.GetType(), filter);
}
return base.InvokeActionMethodWithFilters(controllerContext, filters, actionDescriptor, parameters);
}
}
private ILogger logger;
[Dependency]
public ILogger _logger
{
get
{
return this.logger;
}
set
{
if (value != null)
{
this.logger = value;
}
}
}
public void OnException(ExceptionContext filterContext)
{
if (filterContext != null && filterContext.Exception!=null)
{
_logger.LogError(filterContext.Exception.Message, filterContext.Exception);
}
}
}
public static class Bootstrapper
{
public static IUnityContainer Initialise()
{
var container = BuildUnityContainer();
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
return container;
}
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
RegisterTypes(container);
return container;
}
public static void RegisterTypes(IUnityContainer container)
{
container.RegisterInstance<ILogger>(new Logger());
container.RegisterType<IActionInvoker, InjectIntoActionInvoker>();
}
}

Answer 1

Try injecting the logger in constructor...
public InjectIntoActionInvoker(IUnityContainer container, ILogger lo)
{
_container = container;
this._logger = lo;
}

Answer 2

I'm really not convinced this is going to work for you without using a controller factory. I'm stealing the code example from here, but this gives you a good idea on how to create a customer controller factory, which also configures a custom action invoker:
public class MyControllerFactory : DefaultControllerFactory
{
public override IController CreateController(RequestContext context, string controllerName)
{
var controller = base.CreateController(context, controllerName);
return ReplaceActionInvoker(controller);
}
private IController ReplaceActionInvoker(IController controller)
{
var mvcController = controller as Controller;
if (mvcController != null)
mvcController.ActionInvoker = new ControllerActionInvokerWithDefaultJsonResult();
return controller;
}
}
public class ControllerActionInvokerWithDefaultJsonResult : ControllerActionInvoker
{
public const string JsonContentType = "application/json";
protected override ActionResult CreateActionResult(ControllerContext controllerContext, ActionDescriptor actionDescriptor, object actionReturnValue)
{
if (actionReturnValue == null)
return new EmptyResult();
return (actionReturnValue as ActionResult) ?? new ContentResult()
{
ContentType = JsonContentType,
Content = JsonConvert.SerializeObject(actionReturnValue)
};
}
}
You could still have the custom action invoker, and controller factory for that matter, in a different assembly if you want.