Include WebAPI to an existent project with ASP.NET MVC - TechNet Articles - United States (English) - TechNet Wiki

If you have a new project and want to create a project with MVC and WebAPI together, you just need to>

1. Add reference to System.Web.Http.WebHost.
2. Add App_Start\WebApiConfig.cs (see code snippet below).
3. Import namespace System.Web.Http in Global.asax.cs.
4. Call WebApiConfig.Register(GlobalConfiguration.Configuration) in MvcApplication.Application_Start() (in file Global.asax.cs), before registering the default Web Application route as that would otherwise take precedence.
5. Add a controller deriving from System.Web.Http.ApiController.

You could then learn enough from the tutorial (Your First ASP.NET Web API) to define the API controller.

App_Start\WebApiConfig.cs:

using System.Web.Http;

class WebApiConfig

{

public static


void

Register(HttpConfiguration configuration)

{

configuration.Routes.MapHttpRoute("API Default"

"api/{controller}/{id}",

new { id = RouteParameter.Optional });

}

Global.asax.cs:

using System.Web.Http;

...

}




Global.asax.cs:

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

RegisterGlobalFilters(GlobalFilters.Filters);

WebApiConfig.Register(GlobalConfiguration.Configuration);

RegisterRoutes(RouteTable.Routes);

BundleConfig.RegisterBundles(BundleTable.Bundles);

}

The NuGet package Microsoft.AspNet.WebApi must be installed for the above to work.