How to Integrate Autofac and Log4Net with ASP.NET Web API 2 Application

Question

I have been moving in circles for the last few hours trying to integrate Autofac and ASP.NET Web API 2 Application. I have been following the Autofac and and its wiki at Integrating with ASP.NET Web API.

But clearly, this wiki is outdated for Web API 2. Does anyone have a way i could configure my application to work with Autofac? I am just about giving up and going back to Ninject.

I have installed Autofac, Autofac.WebApi2 and Autofac.Mvc5

I can't call the following

containerBuilder.RegisterApiControllers(Assembly.GetExecutingAssembly());

.InstancePerApiRequest(); not reachable. In fact, anything i try to call with Api in the name is not defined. (Such as RegisterApiControllers, AsWebApiActionFilterFor, RegisterWebApiFilterProvider, InstancePerApiRequest, InstancePerApiControllerType)

Also, i am trying to use Log4Net and i have implemented the Module as per wiki, now in the LoggingActionFilter shown in the wiki, what do i replace this line with as Log4Net does not contain a definition for Write

_logger.Write(actionContext.ActionDescriptor.ActionName);

Yaakov Ellis · Accepted Answer · 2013-12-17 07:16:49Z

2

Try using the Autofac.WebApi5 nuget (be sure to use the syntax for installing the release candidate package) instead of the Autofac.WebApi2 package. Then initialize it using code like this in Global.asax.cs:

IocContainer container = // code to create your container GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);

This setup is working for me on an MVC5/API2 project.

answered Dec 17, 2013 at 7:16

Yaakov Ellis

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4 Comments

Komengem Over a year ago

It really doesn't make a difference. What i need is an updated wiki or instructions that works with web api 2

Yaakov Ellis Over a year ago

@KomengeMwandila According to alexmg (creator of autofac), the WebApi5 nuget is the one to use. You can read more about the web api packages in these two blog posts. The above setup in my answer is working for me. What is happening when you try it? Can you post code or error messages?

Komengem Over a year ago

Looks like everything will work now, for some reason i wasn't getting Autofac.Integration.WebApi; namespace. Also, note that Web API 2 is the latest package compared to web api 5 package you mentioned. I compared the release dates.

sky-dev Over a year ago

Worked for me when .NET could not find GlobalConfiguration.Configuration.DependencyResolver. Thanks! +1

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