
<p>This blog shows how to setup Autofac at ASP.NET Web API 2 with Owin.</p>
<h3>packages.config</h3>
<p>
  Following is the package.config, you can use this nuget command to install all
  the these to your project.<code
    >Update-Package -ProjectName MyProject -reinstall</code
  >
</p>
<pre
  class="language-javascript"
><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;packages&gt;
  &lt;package id="Autofac" version="3.5.0" targetFramework="net452" /&gt;
  &lt;package id="Autofac.Owin" version="3.1.0" targetFramework="net452" /&gt;
  &lt;package id="Autofac.WebApi" version="3.1.0" targetFramework="net452" /&gt;
  &lt;package id="Autofac.WebApi2" version="3.4.0" targetFramework="net452" /&gt;
  &lt;package id="Autofac.WebApi2.Owin" version="3.3.0" targetFramework="net452" /&gt;
  &lt;package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" /&gt;
  &lt;package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" /&gt;
  &lt;package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net452" /&gt;
  &lt;package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net452" developmentDependency="true" /&gt;
  &lt;package id="Microsoft.Owin" version="3.0.1" targetFramework="net452" /&gt;
  &lt;package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net452" /&gt;
  &lt;package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" /&gt;
  &lt;package id="Owin" version="1.0" targetFramework="net452" /&gt;
&lt;/packages&gt;
</code>
</pre>
<h3>Startup class</h3>
<pre class="language-csharp">using Autofac;
using Autofac.Integration.WebApi;
using Microsoft.Owin;
using Owin;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Compilation;
using System.Web.Http;
using WebApplication2.Controllers;

[assembly: OwinStartup(typeof(WebApplication2.Startup))]
namespace WebApplication2
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            HttpConfiguration config = new HttpConfiguration();<br />            // register api routing.
            WebApiConfig.Register(config);
            app.UseWebApi(config);

            var builder = new ContainerBuilder();

            var assemblies = BuildManager.GetReferencedAssemblies().Cast().ToArray();<br />
            builder.RegisterAssemblyModules(assemblies);
            builder.RegisterApiControllers(assemblies);

            var container = builder.Build();
            config.DependencyResolver = new AutofacWebApiDependencyResolver(container);

            app.UseAutofacMiddleware(container);
            app.UseAutofacWebApi(config);
            app.UseWebApi(config);
        }
    }
}</pre>
<h3>API Controller class: TestController</h3>
<pre class="language-csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;

namespace WebApplication2.Controllers
{
    public class TestController : ApiController
    {
        Interface1 _i;
        public TestController(Interface1 i)
        {
            _i = i;
        }

        public IHttpActionResult Get()
        {
           
            return Ok&lt;IList&gt;(new List() { "Hi", "I", "'m", "Just", "testing" });
        }
    }
}
</pre>
<h3>Interface</h3>
<pre class="language-csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WebApplication2
{
    public interface Interface1
    {
        string Do();
    }
}

</pre>
<h3>class implement interface</h3>
<pre class="language-csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication2
{
    public class Class1 : Interface1
    {
        public string Do()
        {
            return Guid.NewGuid().ToString();
        }
    }
}</pre
>
<h3>Autofac Service Module</h3>
<pre class="language-csharp">
using Autofac;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication2
{
    public class ServiceModule : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.RegisterType().As().InstancePerDependency();
        }
    }
}
</pre>


How to setup ASP.NET Web API 2 with Autofac and Owin

Category Autofac

ASP.NET Web API 2 with Autofac Owin