I had similar problem with Unity and Umbraco 7.2.8. You can take a look at my implementation

https://our.umbraco.org/forum/developers/api-questions/72485-umbraco-728-and-unity-dependency-resolver

With this solution the back office breaks and does not work properly.

I asked for some help but I didn't get any help for now

Hi Alex,

Did you have any luck with this? I'm getting the same error when accessing the Umbraco backoffice.

Thanks,

Razvan

Dependecy Injection update:

I tried to follow the tutorial on Umbraco documentation at https://our.umbraco.org/documentation/reference/using-ioc

I started creating with Visual Studio 2012 a new project

With the Package Manager Console in Visual Studio 2012 I added Umbraco and Autofac

PM > Install-Package UmbracoCms
PM> Install-Package Autofac.Mvc5

Following the tutorial I created the class MyAwesomeContext

public class MyAwesomeContext
{
    public MyAwesomeContext()
    {
        MyId = Guid.NewGuid();
    }
    public Guid MyId { get; private set; }
}  

And after that I modified the global.asax following the second method suggested in the tutorial, because the first one was not working:

 public class MyApplication : IApplicationEventHandler
    {

        public void OnApplicationInitialized(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {

        }

        public void OnApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            var builder = new ContainerBuilder();

            //register all controllers found in this assembly
            builder.RegisterControllers(typeof(MyApplication).Assembly);

            //add custom class to the container as Transient instance
            builder.RegisterType<MyAwesomeContext>();

            var container = builder.Build();
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }

        public void OnApplicationStarting(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {

        }
    }

After compiling I got two errors : one on the back end and one in the fron end

Front End Error :

System.MissingMethodException: No parameterless constructor defined for this object.

Back End Error

Received an error from the server Failed to retrieve data for application tree content

Object reference not set to an instance of an object.

EXCEPTION DETAILS:

System.NullReferenceException: Object reference not set to an instance of an object.

*I think that Umbraco 7 is not fully compatible with IOC Container ( I tried with Unity, Ninject and Autofac) *

Obviosly, the tutorial on the documentation is not working

Hi Alex,

We have autofac working without any problem. But there are some Umbraco core things you need to register as well.

This what we have :

        // Register the UmbracoContext as a factory, the controllers require this in their constructor
    builder.Register(c => UmbracoContext.Current).AsSelf();


    builder.RegisterControllers(typeof(MyApplication).Assembly);
    builder.RegisterApiControllers(typeof(MyApplication).Assembly);
    builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);                 

    builder.RegisterType<ApplicationContext>().AsSelf();

        // register your own services here


    // create container 
    var container = builder.Build();

    // setup the mvc dependency resolver to user autofac
    var resolver = new AutofacWebApiDependencyResolver(container);
    GlobalConfiguration.Configuration.DependencyResolver = resolver;
    DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

Dave

It seems that one more constructor have been added to RenderMvcController in latest releases:

RenderMvcController(UmbracoContext umbracoContext, UmbracoHelper umbracoHelper)

so, by default Unity use this constructor with the most parameters and next try to resolve UmbracoHelper using the constructor:

public UmbracoHelper(UmbracoContext umbracoContext, IPublishedContent content, ITypedPublishedContentQuery typedQuery, IDynamicPublishedContentQuery dynamicQuery, ITagQuery tagQuery, IDataTypeService dataTypeService, UrlProvider urlProvider, ICultureDictionary cultureDictionary, IUmbracoComponentRenderer componentRenderer, MembershipHelper membershipHelper);

where IPublishedContent does not have any registered types. Try to register the RenderMvcController constructor explicitly to avoid that:

container.RegisterType<UmbracoContext>(
    new ContainerControlledLifetimeManager(),
    new InjectionFactory(c => UmbracoContext.Current))
.RegisterType<RenderMvcController>(
    new InjectionConstructor(new ResolvedParameter<UmbracoContext>()))

Thanks Alexey for sharing your solution!

I use StructureMap and had the same issue, this is the solution:

x.ForConcreteType<RenderMvcController>()
                .Configure.SelectConstructor(() => new RenderMvcController(UmbracoContext.Current));

We had same issue with unity and umbraco and Merchello, we solved the issue by registering types

        container.RegisterTypes(AppDomain.CurrentDomain.GetAssemblies().SelectMany(x => x.GetTypes()));
        container.RegisterTypes(AllClasses.FromLoadedAssemblies());


        container.RegisterInstance(typeof(UmbracoHelper), new UmbracoHelper(UmbracoContext.Current));
        container.RegisterInstance(typeof(UmbracoContext), UmbracoContext.Current);
        container.RegisterInstance(typeof(Merchello.Core.IMerchelloContext), MerchelloContext.Current);
        container.RegisterInstance(typeof(ApplicationContext), ApplicationContext.Current);
        container.RegisterInstance(typeof(ServiceContext), ApplicationContext.Current.Services);
        container.RegisterInstance(typeof(Umbraco.Core.Services.IMemberService), ApplicationContext.Current.Services.MemberService);

Add an empty controller with name of the document type (ex. ContentPageController) and inherit from Umbraco.Web.Mvc.RenderMvcController

public class ContentPageController : Umbraco.Web.Mvc.RenderMvcController
{
}

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