base api controller get route c#

Question

[Route("api/advertisement/{brandID}/{advertisementID}")]
public class BaseApiController : ApiController
{
    public string AdvertisementID { get; private set; }
    public int BrandID { get; private set; }
    public BaseReportRepository ReportRepository { get; private set; }

    protected override void Initialize(HttpControllerContext controllerContext)
    {
        base.Initialize(controllerContext);

        var routeData = controllerContext.RouteData;

        this.AdvertisementID = routeData.Values["advertisementID"].ToString();
        this.BrandID = (int)routeData.Values["brandID"];

        this.ReportRepository = RepositoryFactory
            .CreateRepository(this.BrandID)
            .ReportRepository;
    }
}

why can not get the router data brandID

what do you have actually in that varaible null or empty string? — CodeNotFound
– CodeNotFound, Commented Jun 15, 2018 at 8:04
@Prashant Pretty sure ApiController's Initialize method doesn't have an override including brandID and advertismentID. — ProgrammingLlama
– ProgrammingLlama, Commented Jun 15, 2018 at 8:07

José Silva · Accepted Answer · 2018-06-15 10:17:06Z

Something like this should solve your problem:

IHttpRouteData requestRouteData = controllerContext.Request.GetRouteData();
IEnumerable<IHttpRouteData> subroutes = (IEnumerable<IHttpRouteData>)requestRouteData.Values["MS_SubRoutes"];
IHttpRouteData routeData = subroutes.FirstOrDefault();
if (routeData != null)
{
    this.AdvertisementID = routeData.Values["advertisementID"].ToString();
    this.BrandID = int.Parse(routeData.Values["brandID"].ToString());
}

You should also constrain your brandID parameter:

[Route("api/advertisement/{brandID:int}/{advertisementID}")]

If you’re traversing the route collection in any way (e.g. in a ControllerSelector) it is important to understand where these routes actually are. When you use attribute routing, all the route attributes get added to a common route without a name. This is a special route that is an instance of an internal class called RouteCollectionRoute. This route has a collection of sub-routes that you can query for that includes all the attribute routes.

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