Autofac.WebApi.Owin

OWIN support for the ASP.NET Web API integration for Autofac.

Please file issues and pull requests for this package in this repository rather than in the Autofac core repo.

• Documentation
• NuGet
• Contributing
• Open in Visual Studio Code

Quick Start

If you are using Web API as part of an OWIN application, you need to:

• Do all the stuff for standard Web API integration - register controllers, set the dependency resolver, etc.
• Set up your app with the base Autofac OWIN integration.
• Add a reference to the Autofac.WebApi2.Owin NuGet package.
• In your application startup class, register the Autofac Web API middleware after registering the base Autofac middleware.

public class Startup
{
  public void Configuration(IAppBuilder app)
  {
    var builder = new ContainerBuilder();

    // STANDARD WEB API SETUP:

    // Get your HttpConfiguration. In OWIN, you'll create one
    // rather than using GlobalConfiguration.
    var config = new HttpConfiguration();

    // Register your Web API controllers.
    builder.RegisterApiControllers(Assembly.GetExecutingAssembly());

    // Run other optional steps, like registering filters,
    // per-controller-type services, etc., then set the dependency resolver
    // to be Autofac.
    var container = builder.Build();
    config.DependencyResolver = new AutofacWebApiDependencyResolver(container);

    // OWIN WEB API SETUP:

    // Register the Autofac middleware FIRST, then the Autofac Web API middleware,
    // and finally the standard Web API middleware.
    app.UseAutofacMiddleware(container);
    app.UseAutofacWebApi(config);
    app.UseWebApi(config);
  }
}

A common error in OWIN integration is use of the GlobalConfiguration.Configuration. In OWIN you create the configuration from scratch. You should not reference GlobalConfiguration.Configuration anywhere when using the OWIN integration.

Check out the documentation for more usage details.

Get Help

Need help with Autofac? We have a documentation site as well as API documentation. We're ready to answer your questions on Stack Overflow or check out the discussion forum.