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

Answer 1

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")]