routing for asp.net web api along with odata

Question

My asp.net web application is hybrid which can have all different types of controllers -

1. asp.net MVC controllers (derived from System.Web.Mvc.Controller)
2. asp.ner Web API controllers (derived from System.Web.Http.ApiController) and
3. asp.net based OData controllers (derived from System.Web.Http.OData.ODataController)

I am trying to configure routing in WebApiConfig.cs for Web API and OData controllers and it looks something like this -

public static void Register(HttpConfiguration config)
{
    config.Routes.MapODataRoute("OData", "odata", CreateEdmModel());

    config.Routes.MapHttpRoute(
         name: "DefaultApi",
         routeTemplate: "api/{controller}/{action}/{id}",
         defaults: new { id = RouteParameter.Optional });
}

public static IEdmModel CreateEdmModel()
{
    ODataConventionModelBuilder modelBuilder = new ODataConventionModelBuilder();
    modelBuilder.EntitySet<Detail>("Details");
            return modelBuilder.GetEdmModel();
}

routes that work -

1. api/Values/GetSummary (for ASP.Net Web API based ValuesController with GetSummary aciton method)
2. Home (for regular asp.net MVC HomeController)

routes that doesnt work-

1. odata/Summary
2. odata/Summary/GetSummary

My regular MVC controllers execute fine, Web API controllers also work fine, but somehow routing is not working for OData controllers. Has anyone tried mix and match in a single application and able to make it work? I will also need to specify action method name in the route, since all action method are mostly GET since it is a reporting application.

Answer 1

Yes, it is possible to mix all these controllers. If MVC's routing was activated first in Global.asax.cs then MVC's default route may not allow to reach OData controllers. Changing the order of lines in Global.asax.cs as shown below will solve the issue. MVC controllers routing is usually setup in RouteConfig.cs , Web API and OData routing in WebAPIConfig.cs if project templates were used.

    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

        GlobalConfiguration.Configure(WebApiConfig.Register); // moved up before MVC's setup
        RouteConfig.RegisterRoutes(RouteTable.Routes);

        BundleConfig.RegisterBundles(BundleTable.Bundles);

    }