Hi Optimizely team,

I'm trying implement custom PartialRouter follow this Developer guide - Routing and seem it's not  working.

I created CustomPartialRouter as bellow:

namespace OptimizelyAlloy
{
    public class RegisteredStartPagePartialRouter : IPartialRouter<StartPage, StartPage>
    {
        public object RoutePartial(StartPage content, UrlResolverContext segmentContext)
        {
            // Get the next URL part
            var nextSegment = segmentContext.GetNextSegment(segmentContext.RemainingSegments);
            if (string.IsNullOrEmpty(nextSegment.Next.ToString()))
            {
                return content;
            }

            Console.WriteLine("Set route id : " + nextSegment.Next);
            
            // Put it in the 'id' parameter
            segmentContext.RouteValues.Add("id", nextSegment.Next.ToString());

            // And anything extra in the remaining path, which will 404 as this URL is then not valid
            segmentContext.RemainingSegments = nextSegment.Remaining;

            return content;
        }

        public PartialRouteData GetPartialVirtualPath(StartPage content, UrlGeneratorContext urlGeneratorContext)
        {
            return null;
        }
    }
}

Registed in DI and called UseTemplate as bellow

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddSingleton<IPartialRouter, RegisteredStartPagePartialRouter>();
}

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        // Required by Wangkanai.Detection
        app.UseDetection();
        app.UseSession();

        app.UseStaticFiles();
        app.UseRouting();
        app.UseAuthentication();
        app.UseAuthorization();
        
        app.UseEndpoints(endpoints =>
        {
            // endpoints.MapControllerRoute(name: "Default", pattern: "{controller}/{action}/{id?}");
            // endpoints.MapControllers();
            // endpoints.MapRazorPages();
            
            endpoints.MapContent()
                .MapTemplate<StartPageController>("{id:string}");
        });
    }

Updated StartPageController to pass string parameter named "id" as bellow

public class StartPageController : PageController<StartPage>
{
    public IActionResult Index(StartPage currentPage, string id = "")
    {
        Console.WriteLine("id param from controller : " + id);
        
        var model = PageViewModel.Create(currentPage);

        // Check if it is the StartPage or just a page of the StartPage type.
        if (SiteDefinition.Current.StartPage.CompareToIgnoreWorkID(currentPage.ContentLink))
        {
            // Connect the view models logotype property to the start page's to make it editable
            var editHints = ViewData.GetEditHints<PageViewModel<StartPage>, StartPage>();
            editHints.AddConnection(m => m.Layout.Logotype, p => p.SiteLogotype);
            editHints.AddConnection(m => m.Layout.ProductPages, p => p.ProductPageLinks);
            editHints.AddConnection(m => m.Layout.CompanyInformationPages, p => p.CompanyInformationPageLinks);
            editHints.AddConnection(m => m.Layout.NewsPages, p => p.NewsPageLinks);
            editHints.AddConnection(m => m.Layout.CustomerZonePages, p => p.CustomerZonePageLinks);
        }

        return View(model);
    }
}

And when debug, I saw custom PartialRouter setted routesValues before go to StartPageController, but parameter still empty as image bellow: