Exception when requesting the first view about autofac.mvc

[alistairjevans]

Is your entire project going through OWIN, or are you running OWIN on top of the normal ASP.NET stack just for SignalR?

I ask because you appear to have the normal Autofac MVC registration, as well as the OWIN registration.

[cervengoc]

I'm using Owin only for SignalR. As far as I know the classic MVC5 cannot work on top of Owin, and requires the classic System.Web hosting environment and IIS.

I know this is not a fortunate setup, however I could not find a better way back then.

[cervengoc]

FYI I tried removing the OWIN-based two lines

app.UseAutofacMiddleware(container);
app.UseAutofacMvc();

The issue is still the same.

[alistairjevans]

Does the error still happen if you comment out the view page property injection?

    // OPTIONAL: Enable property injection in view pages.
    builder.RegisterSource(new ViewRegistrationSource());

[cervengoc]

Yes, that was the point. After commenting it out, everything seems to work fine at first glance. And also, it seems like those two lines in my previous comment are really not needed in this setup.

[alistairjevans]

I suspect you may still need the app.UseAutofacMiddleware to allow SignalR hubs to be loaded from your container (or at least, I have it in my app that does the same thing as yours).

You shouldn't need the app.UseAutofacMvc though, because you aren't serving MVC content over OWIN.

I still feel that there's something up here, adding the ViewRegistrationSource shouldn't cause everything to break like that.

Do your Views derive from a custom type, or directly from WebViewPage?

[cervengoc]

I don't have anything special as far as I can tell. This is my Views\Web.config.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
      <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.Mvc.WebViewPage">
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Routing" />
        <add namespace="ZbOriflame.Web" />
        <add namespace="Vertesz.Web"/>
      </namespaces>
    </pages>
  </system.web.webPages.razor>
  <appSettings>
    <add key="webpages:Enabled" value="false" />
  </appSettings>
  <system.web>
    <httpHandlers>
      <add path="*" verb="*" type="System.Web.HttpNotFoundHandler" />
    </httpHandlers>
    <!--
        Enabling request validation in view pages would cause validation to occur
        after the input has already been processed by the controller. By default
        MVC performs request validation before a controller processes the input.
        To change this behavior apply the ValidateInputAttribute to a
        controller or action.
    -->
    <pages validateRequest="false" pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <controls>
        <add assembly="System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
      </controls>
    </pages>
    <globalization requestEncoding="utf-8" responseEncoding="utf-8" />
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <handlers>
      <remove name="BlockViewHandler" />
      <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler" />
    </handlers>
  </system.webServer>
</configuration>

[alistairjevans]

Ok, thanks; I wonder if there may actually be a defect with the ViewRegistrationSource, in that it doesn't support AjaxHelper properly.

Do you have a recreating project you can upload?

[alistairjevans]

Just to update; I've had a go at re-creating this issue myself, but I can't get the error you're seeing when you have the ViewRegistrationSource in place.

If you are able to provide a sample project that would be great, because I still feel like there's something going on here; until then though I'm going to park this.

[cervengoc]

Sorry for the delay. Unfortunately I don't have too much time for creating a repro project. However, I can try to reduce this project and remove all private information to reproduce the issue. Give me a few days to prepare it.

[alistairjevans]

Thanks @cervengoc, I appreciate the effort.

[lars-nielsen]

@cervengoc

Do you by any chance use builder.RegisterSource(new AnyConcreteTypeNotAlreadyRegisteredSource())

I just ran into the same problem you described when migrating from Unity to Autofac and enabling AnyConcreteTypeNotAlreadyRegisteredSource

[cervengoc]

@lars-nielsen Yes indeed I do use this special source. Unfortunately I still don't have the time to prepare a repro project, so I hope this additional information can help investigating the issue.

[tillig]

It's been a little over two years and we don't have a repro here. Given the limited time of the owners team to address core Autofac and all the integration libraries, without a repro we won't be able to pursue this. I'm going to close the issue and if a repro becomes available we can investigate.

[dwillbarron]

Hi all!

I'm two years late to the party, but I wanted to chime in since I also had this issue and found an appropriate workaround for it. Like some of the others here, I was migrating an MVC project from Unity to Autofac, and needed to use AnyConcreteTypeNotAlreadyRegisteredSource due to the amount of code that depends on this behavior. I ran into the same exception as mentioned in the original issue.

While I don't fully understand the mechanisms involved here, it looks like the cause is that MVC is, for some reason, trying to use Autofac to resolve dependencies in some internal framework code. The workaround here is to provide a predicate that prevents Autofac from trying to resolve these objects:

_builder.RegisterSource(new AnyConcreteTypeNotAlreadyRegisteredSource(type => !type.IsInNamespace("System")));
// Alternatively, you can check to see if types *do* belong to your project's namespace--for us, this wasn't an option due to legacy spaghetti.