ASP.Net Core Nested Area

Question

I want to create area like the following structure

Areas
- Admin
  - FrontEnd
    - Controllers
      - HomeController.cs
    - Views
  - API
    - Controllers
      - HomeController.cs

Startup class

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            app.UseMvc(routes =>
            {
                routes.MapRoute(name: "areaRoute",
                  template: "{area:exists}/{controller=Home}/{action=Index}");

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }

I already marked [Area("Admin/FrontEnd")] to HomeController but it doesn't work. It return the following error

An unhandled exception occurred while processing the request.

InvalidOperationException: The view 'About' was not found. The following locations were searched: /Areas/Admin/Views/Home/About.cshtml

How can I do?

Project

and of course docs.asp.net/en/latest/mvc/controllers/areas.html — Gerardo Grignoli
– Gerardo Grignoli, Commented Aug 12, 2016 at 3:30
Your screenshot have misspeled "FrontEnd" -> "ForntEnd".. it could be that — Gerardo Grignoli
– Gerardo Grignoli, Commented Aug 12, 2016 at 3:31
Already changed but still not work. You provider link is not for nested area. I found the link (github.com/aspnet/Mvc/issues/1595) that it mention ASP.net core doesn't support nested area. is it really? — Eagle
– Eagle, Commented Aug 12, 2016 at 3:41
Ouch... Still you can do one thing. Put Controllers wherever you want (they match by class name, not by namespace). Put Views wherever you want but on each method return View("~/Full/Relative/Path/About.cshtml"); — Gerardo Grignoli
– Gerardo Grignoli, Commented Aug 12, 2016 at 3:43

Kiran · Accepted Answer · 2016-08-12 21:45:48Z

3

You can use the AreaViewLocationFormats on RazorViewEngineOptions to indicate what all paths you want MVC to look for views.

services.Configure<RazorViewEngineOptions>(o =>
{
    o.AreaViewLocationFormats.Insert(0, "/Areas/{2}/FrontEnd/Views/Shared/{0}.cshtml");
    o.AreaViewLocationFormats.Insert(0, "/Areas/{2}/FrontEnd/Views/{1}/{0}.cshtml");
});

You can read the detailed documentation on what AreaViewLocationFormats is over here: https://github.com/aspnet/Mvc/blob/1.0.0/src/Microsoft.AspNetCore.Mvc.Razor/RazorViewEngineOptions.cs#L92

Also you can just decorate your controllers to be just [Area("Admin")]

answered Aug 12, 2016 at 21:45

Kiran

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