umb 704 plus autofac = failed to retrieve data for application tree content - Installing umbraco

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Bouy 7 posts 27 karma points

Apr 02, 2014 @ 01:13
0

Umb. 7.0.4 + Autofac = "Failed to retrieve data for application tree content"
Hello,I have a class "DependecyConfig" which is called from Global.asax on OnApplicationStarting.

DependecyConfig.cs

public static IContainer RegisterDependencies(Assembly currentAssembly)
        {

            var builder = new ContainerBuilder();

            // Register the controllers.
            builder.RegisterControllers(currentAssembly);
            builder.RegisterApiControllers(currentAssembly);

            builder.RegisterFilterProvider();

            var container = builder.Build();

            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
            GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);

            return container;
        }

So there is an error while parsing Umbraco Nodes

Failed to retreive data for application tree content

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

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

Stack Trace:
```
at Umbraco.Web.Trees.ApplicationTreeExtensions.TryLoadFromControllerTree(ApplicationTree appTree, String id, FormDataCollection formCollection, HttpControllerContext controllerContext)

   at Umbraco.Web.Trees.ApplicationTreeController.<GetRootForSingleAppTree>d__17.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

   at Umbraco.Web.Trees.ApplicationTreeController.<GetApplicationTrees>d__4.MoveNext()
```
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Bouy 7 posts 27 karma points

Apr 02, 2014 @ 01:14

0

I have sql 2008 r2 server. So i dont think this is MySQL.

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Dave Woestenborghs 3504 posts 12135 karma points MVP 9x admin c-trib

Apr 02, 2014 @ 08:50

0

Can you have a look at the last post on this page : http://our.umbraco.org/forum/developers/api-questions/41794-Web-API-UmbracoApiController-does-not-use-DependencyResolver?p=1

Maybe this code can help you out

Dave

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Tom Hall 4 posts 29 karma points

Apr 16, 2014 @ 15:32

0

@Bouy - did you resolve the problem?

I've just run into the problem, I'm using Umbraco 7.1.1 with Autofac 3.3.1. I've followed the steps in this post (http://our.umbraco.org/forum/developers/api-questions/41794-Web-API-UmbracoApiController-does-not-use-DependencyResolver?p=1), but still the back office is throwing the same exception.

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Tom Hall 4 posts 29 karma points

Apr 17, 2014 @ 02:21

Update:

I've solved my problems with Umbraco 7.1.1 and Autofac 3.3.1. Here's what I did:

```
Install-Package Autofac.Mvc4
```
```
Install-Package Autofac.WebApi
```

Then, initialize Autofac as follows:

        public static void Initialize()
        {
            var builder = new ContainerBuilder();

            // Register umbraco context, mvc controllers and api controllers
            builder.Register(c => UmbracoContext.Current).AsSelf();
            builder.RegisterControllers(Assembly.GetExecutingAssembly());
            builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);

            // Register application specific types 
            RegisterTypes(builder);

            var container = builder.Build();
            var resolver = new AutofacWebApiDependencyResolver(container);
            GlobalConfiguration.Configuration.DependencyResolver = resolver;
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
        }

I hope that helps others solve this problem.

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Simon Dingley 1474 posts 3431 karma points c-trib

Oct 20, 2016 @ 14:20
0
Lifesaver - thanks! The key to resolving the issue for me was this line:
```
builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);
```
UmbracoCms 7.5.2 & Autofac.Mvc5 & Autofac.WebApi2
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mark firth 32 posts 75 karma points

Aug 03, 2014 @ 14:29

0

Helped me. Had the exact same error.

Thanks Tom for posting the fix.

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Bart Plasmeijer 5 posts 25 karma points

Nov 01, 2014 @ 23:40

0

Same here!

Thanks Tom.

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alper 8 posts 55 karma points

Feb 24, 2015 @ 09:58

0

check out this video : https://www.youtube.com/watch?v=sDQwu_DzYyc

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Matt Cheale 8 posts 33 karma points

Jan 05, 2016 @ 17:06
2
This fixed my issue too, with the slight difference that my controllers are in a separate project. I added the following line to resolve this:
```
builder.RegisterApiControllers(typeof(UmbracoContext).Assembly);
```
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Nguyen Hien 52 posts 133 karma points

Jan 17, 2016 @ 16:15

0

This is exactly I need

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Matthew Hunt 13 posts 35 karma points

Apr 03, 2017 @ 22:52
0
bit late to this party, but had this issue and fixed with
```
builder.RegisterApiControllers(typeof(Umbraco.Forms.Web.Trees.FormTreeController).Assembly)
```
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James Drever 118 posts 149 karma points

May 23, 2017 @ 10:13

1

This also saved me! Thanks for posting Tom! Proves how many people a post can help out over the years!

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Umb. 7.0.4 + Autofac = "Failed to retrieve data for application tree content"

Failed to retreive data for application tree content

Object reference not set to an instance of an object.