Use Area in ASP.NET Core MVC 5

On the Visual Studio, select Create a new project from Get Started

Select ASP.NET Core Web Application




Input Project Name and select Location for new project

Select ASP.NET Core 5.0 Version and select ASP.NET Core Empty Template. Click Create button to finish




Open Startup.cs file and add new configurations as below:

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace LearnASPNETCoreMVC5
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
        }

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

            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Demo}/{action=Index}/{id?}");
            });
        }
    }
}

Create new folder named Controllers. In Controllers folder, create new controller as below:

Create new controller named HomeController.cs as below:

using Microsoft.AspNetCore.Mvc;

namespace LearnASPNETCoreMVC5.Controllers
{
    [Route("home")]
    public class HomeController : Controller
    {
        [Route("")]
        [Route("index")]
        [Route("~/")]
        public IActionResult Index()
        {
            return View();
        }
    }
}




In Views folder, create new views as below:

In Views/Home folder, create new view named Index.cshtml as below:

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>

    <h3>Home Page</h3>
	<br />
	<a asp-area="admin" asp-controller="home" asp-action="index">Link 1</a> 
	<br />
	<a asp-area="admin" asp-controller="home" asp-action="index2" asp-route-id="123">Link 2</a>

</body>
</html>

In project, create new area named Admin. In this area, create new Controller and Views as below:

In Area\Admin\Controllers folder, create new controller named HomeController.cs as below:

using Microsoft.AspNetCore.Mvc;

namespace LearnASPNETCoreMVC5.Areas.Admin.Controllers
{
    [Area("admin")]
    [Route("admin/home")]
    public class HomeController : Controller
    {
        [Route("")]
        [Route("index")]
        public IActionResult Index()
        {
            return View();
        }

        [Route("index2/{id}")]
        public IActionResult Index2(int id)
        {
            Debug.WriteLine("id: " + id);
            return View("Index");
        }

    }
}




In Views/Home folder, create new view named Index.cshtml as below:

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>

    <h3>Home Admin Page</h3>

</body>
</html>




Access Index action in Home controller with following url: http://localhost:49328

Output

Access Index action in Home controller in Admin area with following url: http://localhost:49328/admin/home/index

Output