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  • Container<ImplementerOfIInterface> is not Container<IInterface>. Why not?

    - by Chris Simmons
    Why wouldn't DoesntWork() work below? The error is: Cannot implicitly convert type 'List' to 'IEnumerable'. An explicit conversion exists (are you missing a cast?). I know this is something about generic/templates I'm not getting, but List is IEnumerable and Implementer is an IInterface. I don't see why this needs to be casted (or if it really can be). public interface IInterface { // ... } public class Implementer : IInterface { // ... } IEnumerable<IInterface> DoesntWork() { List<Implementer> result = new List<Implementer>(); return result; }

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  • jQuery ajax.load div, then have parent container access property

    - by Brett
    So I have a tabbed ui "form", each tab is quiet complicated so it is loaded via the .load('item.html'); command. All good, when the user clicks to a different tab, I want to read a property, maybe execute a function from within the ajax loaded div. What is the best way to get to these properties and methods from outsite the ajax loaded div?

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  • Using an iterator without its container

    - by User1
    I am mixing some C and C++ libraries and have only a single pointer available to do some work in a callback function. All I need to do is iterate through a vector. Here's a simplified, untested example: bool call_back(void* data){ done=... if (!done) cout << *data++ << endl; return done; } Note that this function is in an extern "C" block in C++. call_back will be called until true is returned. I want it to cout the next element each time it's called. data is a pointer to something that I can pass from elsewhere in the code (an iterator in the above example, but can be anything). Something from data will likely be used to calculate done. I see two obvious options to give to data: Have data point to my vector. Have data point to an iterator of my vector. I can't use an iterator without having the .end() method available, right? I can't use a vector alone (unless maybe I start removing its data). I could make a struct with both vector and iterator, but is there a better way? What would you do?

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  • Unknown Space between 2 Container Divs

    - by Paul
    Im trying to determine why there would be space between 2 Containing Divs as shown, and I would appreciate any insight as to why this is occurring: The unknown space occurs between the mid-feature div (olive) and bottom-wrap div (orange) I have no heights set anywhere. I would like to see the orange div up against the olive div just above it. I can post all of the CSS, or you can FireBug this: www.davincispainting.com Here is all of the CSS: *{ margin:0; padding:0 } body { /*background: url("/images/blueback5.jpg") repeat-x scroll 0 0 transparent;*/ background-color: #9EB0C8; font-family: Arial,Helvetica,sans-serif; font-size: 62.5%; } #top-wrap { height: 126px; width: 940px; /*background-color: Yellow;*/ margin: 5px 0 0 0; } #head-logo { background: url("/images/logo3.png") no-repeat scroll 0 0 transparent; /*background-color: Green;*/ height: 126px; width: 214px; margin: 0px 0 0 58px; position: absolute; z-index: 100; } #submenu1 { border: 0 solid #000000; color: #FFFFFF; /*background-color:Green;*/ font-family: Arial,Impact,Impact5,Charcoal6,sans-serif; font-size: 1.6em; height: 35px; width: 155px; /*padding: 10px 0 0;*/ margin: 7px 0 0 774px; position: absolute; } #submenu2 { /*border: 0 solid #000000;*/ color: #FFFFFF; /*background-color:Blue;*/ font-family: Arial,Impact,Impact5,Charcoal6,sans-serif; font-size: 1.8em; text-align: right; height: 20px; width: 114px; margin: 30px 0 0 818px; /*padding: 5px 0 0;*/ } a.contact { background-image: url("/images/RapidButton2.png"); /*border: 1px solid #CCCCCC;*/ /*clear: both;*/ /*color: #FFFFFF;*/ display: block; font-size: 11px; /*margin-bottom: 1px;*/ /*padding: 3px 5px;*/ text-align: center; width: 165px; height: 27px; } a.contact:hover { background-image: url("/images/RapidButtonHov2.png"); } #navigation-primary { margin: 12px 0 0 276px; position: absolute; } #global-wrap { margin: 0 auto; text-align: left; width: 880px; overflow: hidden; } #global-inner { background: url("/images/main_bg.gif") repeat-y scroll 0 0 #E4EAEF; font-family: Arial; font-size: 1.2em; margin: 15px 0 55px 0; overflow: hidden; text-align: left; width: 880px; } #global-inner .topleft { background: url("/images/main_left_top_corner2.jpg") no-repeat scroll left top transparent; float: left; height: 9px; width: 9px; } #global-inner .topright { background: url("/images/main_right_top_corner2.jpg") no-repeat scroll right top transparent; float: right; height: 9px; width: 9px; } #global-inner .bottomleft { background: url("/images/main_left_bottom_corner.jpg") no-repeat scroll left bottom transparent; float: left; height: 9px; margin-top: -8px; /*margin: 776px 0 0 0;*/ width: 9px; } #global-inner .bottomright { background: url("/images/main_right_bottom_corner.jpg") no-repeat scroll right bottom transparent; float: right; height: 9px; margin-top: -8px; /*margin: 776px 0 0 0;*/ width: 9px; } #top-feature { height:330px; width: 848px; margin: 12px 0 0 16px; background: #E4EAEF; /*background: orange;*/ /*padding: 10px 0 0 10px;*/ position: absolute; text-align: left; } .slideshow { height: 330px; width: 848px; margin: 0 0 0 0; /*background: blue;*/ position: absolute; } #mid-feature { margin:350px 0 0 16px; width:848px; height:318px; background-color:Olive; position:relative; overflow:hidden; } #mid-featureleft { height:318px; width:552px; /*background-color:Purple;*/ float:left; position:relative; } #mid-featureright { height:318px; width:296px; background-color:#B9C1CC; /*background-color: red;*/ float:left; position: relative; } #mid-featureleft h1 { color: #FF0000; font-family: Arial,Helvetica,sans-serif; font-size: 2.1em; } #mid-featureleft .contentbox { padding:7px 7px 7px 7px; } #mid-featureleft p { color: #0C2A55; margin:0px 0 11px 0px; /*font-style:normal;*/ /*width: 97%;*/ /*font-size: .5em;*/ font-size: 12px; } #bottom-wrap { height:60px; width: 868px; margin: auto 0 0 6px; background:orange; position: relative; } #copyright { float: left; /*background-color:Teal;*/ width: 260px; height: 60px; text-align: left; position: absolute; margin:0 0 0 6px; } #bottom-logos { height:60px; width:596px; margin:0 0 0 267px; background: url("/images/logos2.png") no-repeat scroll 0 0 transparent; /*background-color:red;*/ position:absolute; }

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  • Container of Generic Types in java

    - by Cyker
    I have a generic class Foo<T> and parameterized types Foo<String> and Foo<Integer>. Now I want to put different parameterized types into a single ArrayList. What is the correct way of doing this? Candidate 1: public class MMM { public static void main(String[] args) { Foo<String> fooString = new Foo<String>(); Foo<Integer> fooInteger = new Foo<Integer>(); ArrayList<Foo<?> > list = new ArrayList<Foo<?> >(); list.add(fooString); list.add(fooInteger); for (Foo<?> foo : list) { // Do something on foo. } } } class Foo<T> {} Candidate 2: public class MMM { public static void main(String[] args) { Foo<String> fooString = new Foo<String>(); Foo<Integer> fooInteger = new Foo<Integer>(); ArrayList<Foo> list = new ArrayList<Foo>(); list.add(fooString); list.add(fooInteger); for (Foo foo : list) { // Do something on foo. } } } class Foo<T> {} In a word, it is related to the difference between Foo<?> and the raw type Foo. Update: Grep What is the difference between the unbounded wildcard parameterized type and the raw type? on this link may be helpful.

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  • Use a table as container or not?

    - by Camran
    I have created my entire website by using a main table, and having the content inside the table. Some ppl suggest this is wrong, and I would like to know what to do specifically in my situation. On my index.html I have a <table align="center"> and then all content in it. Now the content is in form of DIVS and they all have relative positioning, so they are relative to the table. For example: <table align="center"> <tr> <td> <div style="position:relative; left:14px; top:50px;"> CONTENT HERE... (Form, divs, images) </div> </td> </tr> </table> I have just gotten to the stage of browser compatibility. Without making any changes whatsoever, my website works perfect in FF, SAFARI, Chrome and Opera. Only trouble with IE. So for my Q, if you where me, would you change my layout and remove the tables, and instead use alot more css and alot more DIVS, or would you go with what I have? And please if you answer me, don't just provide me with the answer, but also a "why" that is... in other words, give me arguments and facts... Thanks

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  • Loop through children and display each, as3

    - by VideoDnd
    How do I loop through all of my children, and display each? I would like to know the best way to do this. my children and containerfive children, one plays every sec, 1,2,3, etc. var square1:Square1 = new Square1; var square2:Square2 = new Square2; var square3:Square3 = new Square3; var square4:Square4 = new Square4; var square5:Square5 = new Square5; var container:Sprite = new Sprite; addChild(container); container.addChild(square1) container.addChild(square2) container.addChild(square3) container.addChild(square4) container.addChild(square5) my timer var timly:Timer = new Timer(1000, 5); timly.start(); timly.addEventListener(TimerEvent.TIMER, onLoop); Note: Tried for loop, numChildren -1, and visibility ERROR 'access of undefined property' //Thomas's idea var timly:Timer = new Timer(1000, 10); timly.start(); timly.addEventListener(TimerEvent.TIMER, onLoop, false, 0, true); // var square1:Square1 = new Square1; square1.visible = false container.addChild(square2) var square2:Square2 = new Square2; square2.visible = false container.addChild(square3) var square3:Square3 = new Square3; square3.visible = false container.addChild(square3) var square4:Square4 = new Square4; square4.visible = false container.addChild(square4) var square5:Square5 = new Square5; square5.visible = false container.addChild(square5) var container:Sprite = new Sprite; this.addChild(container); var curCount:Number = 100; // function collectChildren(container:DisplayObjectContainer):Array { var len:int = container.numChildren; var mySquaresArray:Array = []; for (var i:int = 0; i < len; i++) { mySquaresArray.push(container.getChildAt(i).name); } return mySquaresArray; } // function onLoop( e:Event ) { curCount = e.target.currentCount; if( curCount > 1 ) { var previous_square = curCount -2; mySquaresArray[previous_square].visible = false; } var current_square = curCount - 1; mySquaresArray[current_square].visible = true; }

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  • CompositionHost.Initialize() can not execute twice.

    - by Khoa
    I am currently try to integrate MEF and PRISM to work with each other. Everything is working fine so far. Now i would like to use MEF runtime module discovery (DeploymentCatalog) which will be used to download XAPs from server directory and then plug it into one of the Region inside my MAIN UI. I am using UnityBootStrapper and inside this class i also integrated MEF container. This sample application is based on Glenn Block (http://codebetter.com/glennblock/2010/01/03/mef-and-prism-exploration-mef-module-loading/). The following code is used to initialize CompositionContainer inside my Bootstrapper: // This is the host catalog which contains all parts of running assembly. var catalog = GetHostCatalog(); // Create MEF container which initial catalog var container = new CompositionContainer(catalog); // here we explicitly map a part to make it available on imports elsewhere, using // Unity to resolve the export so dependencies are resolved // We do this because region manager is third-party ... therefore, we need to // export explicitly because the implementation doesn't have its own [export] tag container.ComposeExportedValue<IRegionManager>(Container.Resolve<IRegionManager>()); container.ComposeExportedValue<IEventAggregator>(Container.Resolve<IEventAggregator>()); // Obtain CatalogService as a singleton // All dynamic modules will use this service to add its parts. Container.RegisterInstance<ICatalogService>(new CatalogService(catalog)); // Initialize the container CompositionHost.Initialize(container); Now i have another class called DeploymentCatalogService which is used to download the XAP from server. The current problem i am facing is that inside DeploymentCatalogService Initialize method, CompositionHost container is try to initialize its container with aggregateCatalog again. _aggregateCatalog = new AggregateCatalog(); _aggregateCatalog.Catalogs.Add(new DeploymentCatalog()); CompositionHost.Initialize(_aggregateCatalog); This causes an Exception which stated that The container has already been initialized. Is there a way to use the existing container and update it with the new aggregateCatalog? Hope this is not too confusing. Please be nice i am still new to MEF. Cheers,

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  • vector iterator not dereferencable at runtime on a vector<vector<vector<A*>*>*>

    - by marouanebj
    Hi, I have this destructor that create error at runtime "vector iterator not dereferencable". The gridMatrix is a std::vector<std::vector<std::vector<AtomsCell< Atom<T> * > * > * > * > I added the typename and also the typedef but I still have the error. I will move for this idea of vect of vect* of vect* to use boost::multi_array I think, but still I want to understand were this is wrong. /// @brief destructor ~AtomsGrid(void) { // free all the memory for all the pointers inside gridMatrix (all except the Atom<T>* ) //typedef typename ::value_type value_type; typedef std::vector<AtomsCell< Atom<T>* >*> std_vectorOfAtomsCell; typedef std::vector<std_vectorOfAtomsCell*> std_vectorOfVectorOfAtomsCell; std_vectorOfAtomsCell* vectorOfAtomsCell; std_vectorOfVectorOfAtomsCell* vectorOfVecOfAtomsCell; typename std_vectorOfVectorOfAtomsCell::iterator itSecond; typename std_vectorOfVectorOfAtomsCell::reverse_iterator reverseItSecond; typename std::vector<std_vectorOfVectorOfAtomsCell*>::iterator itFirst; //typename std::vector<AtomsCell< Atom<T>* >*>* vectorOfAtomsCell; //typename std::vector<std::vector<AtomsCell< Atom<T>* >*>*>* vectorOfVecOfAtomsCell; //typename std::vector<std::vector<AtomsCell< Atom<T>* >*>*>::iterator itSecond; //typename std::vector<std::vector<AtomsCell< Atom<T>* >*>*>::reverse_iterator reverseItSecond; //typename std::vector<std::vector<std::vector<AtomsCell< Atom<T>* >*>*>*>::iterator itFirst; for (itFirst = gridMatrix.begin(); itFirst != gridMatrix.end(); ++itFirst) { vectorOfVecOfAtomsCell = (*itFirst); while (!vectorOfVecOfAtomsCell->empty()) { reverseItSecond = vectorOfVecOfAtomsCell->rbegin(); itSecond = vectorOfVecOfAtomsCell->rbegin().base(); vectorOfAtomsCell = (*itSecond); // ERROR during run: "vector iterator not dereferencable" // I think the ERROR is because I need some typedef typename or template ???!!! // the error seems here event at itFirst //fr_Myit_Utils::vectorElementDeleter(*vectorOfAtomsCell); //vectorOfVecOfAtomsCell->pop_back(); } } fr_Myit_Utils::vectorElementDeleter(gridMatrix); } If someone want the full code that create the error I'm happy to give it but I do not think we can attach file in the forum. BUT still its is not very big so if you want it I can copy past it here. Thanks

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  • MEF Property Export with PartCreationPolicy

    - by Daniel Skinner
    When I try to do this: [Export(typeof(IMyService))] [PartCreationPolicy(CreationPolicy.Shared)] private MyService Service { get { var service = new MyService(); service.Configure(); return service; } } I get a compile error: Attribute 'PartCreationPolicy' is not valid on this declaration type. It is only valid on 'class' declarations. Is this a bug? I don't see why MEF would allow property exports but not allow one to specify the part lifetime. Using VS2010 RC.

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  • Issue with Autofac 2 and MVC2 using HttpRequestScoped

    - by Page Brooks
    I'm running into an issue with Autofac2 and MVC2. The problem is that I am trying to resolve a series of dependencies where the root dependency is HttpRequestScoped. When I try to resolve my UnitOfWork (which is Disposable), Autofac fails because the internal disposer is trying to add the UnitOfWork object to an internal disposal list which is null. Maybe I'm registering my dependencies with the wrong lifetimes, but I've tried many different combinations with no luck. The only requirement I have is that MyDataContext lasts for the entire HttpRequest. I've posted a demo version of the code for download here. Autofac modules are set up in web.config Global.asax.cs protected void Application_Start() { string connectionString = "something"; var builder = new ContainerBuilder(); builder.Register(c => new MyDataContext(connectionString)).As<IDatabase>().HttpRequestScoped(); builder.RegisterType<UnitOfWork>().As<IUnitOfWork>().InstancePerDependency(); builder.RegisterType<MyService>().As<IMyService>().InstancePerDependency(); builder.RegisterControllers(Assembly.GetExecutingAssembly()); _containerProvider = new ContainerProvider(builder.Build()); IoCHelper.InitializeWith(new AutofacDependencyResolver(_containerProvider.RequestLifetime)); ControllerBuilder.Current.SetControllerFactory(new AutofacControllerFactory(ContainerProvider)); AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); } AutofacDependencyResolver.cs public class AutofacDependencyResolver { private readonly ILifetimeScope _scope; public AutofacDependencyResolver(ILifetimeScope scope) { _scope = scope; } public T Resolve<T>() { return _scope.Resolve<T>(); } } IoCHelper.cs public static class IoCHelper { private static AutofacDependencyResolver _resolver; public static void InitializeWith(AutofacDependencyResolver resolver) { _resolver = resolver; } public static T Resolve<T>() { return _resolver.Resolve<T>(); } } UnitOfWork.cs public interface IUnitOfWork : IDisposable { void Commit(); } public class UnitOfWork : IUnitOfWork { private readonly IDatabase _database; public UnitOfWork(IDatabase database) { _database = database; } public static IUnitOfWork Begin() { return IoCHelper.Resolve<IUnitOfWork>(); } public void Commit() { System.Diagnostics.Debug.WriteLine("Commiting"); _database.SubmitChanges(); } public void Dispose() { System.Diagnostics.Debug.WriteLine("Disposing"); } } MyDataContext.cs public interface IDatabase { void SubmitChanges(); } public class MyDataContext : IDatabase { private readonly string _connectionString; public MyDataContext(string connectionString) { _connectionString = connectionString; } public void SubmitChanges() { System.Diagnostics.Debug.WriteLine("Submiting Changes"); } } MyService.cs public interface IMyService { void Add(); } public class MyService : IMyService { private readonly IDatabase _database; public MyService(IDatabase database) { _database = database; } public void Add() { // Use _database. } } HomeController.cs public class HomeController : Controller { private readonly IMyService _myService; public HomeController(IMyService myService) { _myService = myService; } public ActionResult Index() { // NullReferenceException is thrown when trying to // resolve UnitOfWork here. // Doesn't always happen on the first attempt. using(var unitOfWork = UnitOfWork.Begin()) { _myService.Add(); unitOfWork.Commit(); } return View(); } public ActionResult About() { return View(); } }

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  • Get Instance from StructureMap by Type Name

    - by JC Grubbs
    Is there any way to request an instance from the StructureMap ObjectFactory by the string name of the type? For example, it would be nice to do something like this: var thing = ObjectFactory.GetInstance("Thing"); The use case here is a messaging scenario in which the message is very generic and contains only the name of a task. The handler receives the message, gets the task name from the message and retrieves the Type of task runner from a configuration database. StructureMap scans all the assemblies in a directory and one of them will contain the Type returned from the config database which then needs to be instantiated. The other possibility is to grab a Type instance by doing the following: var type = Type.GetType("Thing"); But the problem there is the assembly may or may/not be loaded in the AppDomain so that reflection call isn't always possible.

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  • Configuring Unity with a closed generic constructor parmater

    - by fearofawhackplanet
    I've been trying to read the article here but I still can't understand it. I have a constructor resembling the following: IOrderStore orders = new OrderStore(new Repository<Order>(new OrdersDataContext())); The constructor for OrderStore: public OrderStore(IRepository<Order> orderRepository) Constructor for Repository<T>: public Repository(DataContext dataContext) How do I set this up in the Unity config file? UPDATE: I've spent the last few hours banging my head against this, and although I'm not really any closer to getting it right I think at least I can be a little more specific about the problem. I've got my IRespository<T> working ok: <typeAlias alias="IRepository" type="MyAssembly.IRepository`1, MyAssembly" /> <typeAlias alias="Repository" type="MyAssembly.Repository`1, MyAssembly" /> <typeAlias alias="OrdersDataContext" type="MyAssembly.OrdersDataContext, MyAssembly" /> <types> <type type="OrdersDataContext"> <typeConfig> <constructor /> <!-- ensures paramaterless constructor used --> </typeConfig> </type> <type type="IRepository" mapTo="Repository"> <typeConfig> <constructor> <param name="dataContext" parameterType="OrdersDataContext"> <dependency /> </param> </constructor> </typeConfig> </type> </types> So now I can get an IRepository like so: IRepository rep = _container.Resolve(); and that all works fine. The problem now is when trying to add the configuration for IOrderStore <type type="IOrderStore" mapTo="OrderStore"> <typeConfig> <constructor> <param name="ordersRepository" parameterType="IRepository"> <dependency /> </param> </constructor> </typeConfig> </type> When I add this, Unity blows up when trying to load the config file. The error message is OrderStore does not have a constructor that takes the parameters (IRepository`1). What I think this is complaining about is because the OrderStore constructor takes a closed IRepository generic type, ie OrderStore(IRepository<Order>) and not OrderStore(IRepository<T>) I don't have any idea how to resolve this.

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  • Why are IOC containers unnecessary with dynamic languages

    - by mikemay
    Someone on the Herding Code podcast No. 68, http://herdingcode.com/?p=231, stated that IOC containers had no place with Python or Javascript, or words to that effect. I'm assuming this is conventional wisdom and that it applies to all dynamic languages. Why? What is it about dynamic languages that makes IOC containers unnecessary?

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  • overwhelmed by IOC choices

    - by Steve
    There are so many IOC choices, that I don't know where to begin. I've looked at Spring.NET, Unity, Ninject, Windsor, and StructureMap so far, and I have no idea what makes one better than the other. So, what is your favorite IOC, and what feature(s) makes you use it over any other?

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  • Microsoft.Practices.ServiceLocation and TryGetInstance

    - by Feryt
    Why Microsoft.Practices.ServiceLocation.IServiceLocator does not offer TryGetInstance()? I need to get generic validator instance ServiceLocator.Current.GetInstance<IEntityValidator<TEntity>>() but not all Entities has registered validator. The only solution i found is to use try{}catch{} block, but i dont like this approach.

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  • Howto set my IServiceLocator implementation as ServiceLocator.Current?

    - by stiank81
    I'm working on replacing Unity with Ninject in the Prism framework. This requires me to implement a Ninject specific IServiceLocator. From what I've understood I can inherit the ServiceLocatorImplBase instead, so that's what I do. Now how can I set this to be the Current ServiceLocator? I need this in order to have e.g. the RegionManager get it when it creates regions, and calls: IServiceLocator locator = ServiceLocator.Current; This is a static property, but it doesn't have a setter.. There is a function: void ServiceLocator.SetLocatorProvider(ServiceLocatorProvider newProvider); ..but the argument doesn't match my ServiceLocatorImplBase. Any ideas?

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  • IoC - Dynamic Composition of object instances

    - by Joshua Starner
    Is there a way using IoC, MEF [Imports], or another DI solution to compose dependencies on the fly at object creation time instead of during composition time? Here's my current thought. If you have an instance of an object that raises events, but you are not creating the object once and saving it in memory, you have to register the event handlers every time the object is created. As far as I can tell, most IoC containers require you to register all of the classes used in composition and call Compose() to make it hook up all the dependencies. I think this may be horrible design (I'm dealing with a legacy system here) to do this due to the overhead of object creation, dependency injection, etc... but I was wondering if it was possible using one of the emergent IoC technologies. Maybe I have some terminology mixed up, but my goal is to avoid writing a framework to "hook up all the events" on an instance of an object, and use something like MEF to [Export] handlers (dependencies) that adhere to a very specific interface and [ImportMany] them into an object instance so my exports get called if the assemblies are there when the application starts. So maybe all of the objects could still be composed when the application starts, but I want the system to find and call all of them as the object is created and destroyed.

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  • Specifying type when resolving objects through Ninject

    - by stiank81
    Given the class Ninja, with a specified binding in the Ninject kernel I can resolve an object doing this: var ninja = ninject.Get<Ninja>(); But why can't I do this: Type ninjaType = typeof(Ninja); var ninja = ninject.Get<ninjaType>(); What's the correct way of specifying the type outside the call to Get?

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  • Examples of IOC/DI over Singleton

    - by Amitd
    Hi, Just started learning/reading about DI and IOC frameworks. Also I read many articles on SO and internet that say that one should prefer DI/IOC over singleton. Can anyone give/link examples of exactly how DI/IOC eliminates/solves the various issues regarding the Singleton pattern? (hopefully code and explanation for better understanding) Also given a system has already implemented Singleton pattern, how to refactor/implement DI/IOC for the same? (any examples for the same?) (Language/Framework no bars..C# would be helpful) Thanks

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  • Resolution Problem with HttpRequestScoped in Autofac

    - by Page Brooks
    I'm trying to resolve the AccountController in my application, but it seems that I have a lifetime scoping issue. builder.Register(c => new MyDataContext(connectionString)).As<IDatabase>().HttpRequestScoped(); builder.Register(c => new UnitOfWork(c.Resolve<IDatabase>())).As<IUnitOfWork>().HttpRequestScoped(); builder.Register(c => new AccountService(c.Resolve<IDatabase>())).As<IAccountService>().InstancePerLifetimeScope(); builder.Register(c => new AccountController(c.Resolve<IAccountService>())).InstancePerDependency(); I need MyDataContext and UnitOfWork to be scoped at the HttpRequestLevel. When I try to resolve the AccountController, I get the following error: No scope matching the expression 'value(Autofac.Builder.RegistrationBuilder`3+<c__DisplayClass0[...]).lifetimeScopeTag.Equals(scope.Tag)' is visible from the scope in which the instance was requested. Do I have my dependency lifetimes set up incorrectly?

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