Use Parameters to Routes 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 this folder, create new controller named DemoController.cs as below:

using Microsoft.AspNetCore.Mvc;

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

        [Route("demo2/{id}")]
        public IActionResult Demo2(int id)
        {
            ViewBag.id = id;
            return View("Demo2");
        }

        [Route("demo3/{id1}/{id2}")]
        public IActionResult Demo3(int id1, string id2)
        {
            ViewBag.id1 = id1;
            ViewBag.id2 = id2;
            return View("Demo3");
        }

    }
}




Create new folder named Views. In this folder, create new folder named Demo and add new views as below:

In Demo folder, create new view named Index.cshtml as below:

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

    <h3>Index View</h3>
    <a asp-controller="demo" asp-action="demo2" asp-route-id="123">Demo 2</a>
    <br />
    <a asp-controller="demo" asp-action="demo3" asp-route-id1="123" asp-route-id2="p01">Demo 3</a>

</body>
</html>

In Demo folder, create new view named Demo2.cshtml as below:

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Demo 2</title>
</head>
<body>

    <h3>Demo 2 View</h3>
    Id: @ViewBag.id

</body>
</html>

In Demo folder, create new view named Demo3.cshtml as below:

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Demo 2</title>
</head>
<body>

    <h3>Demo 3 View</h3>
    Id 1: @ViewBag.id1
    <br />
    Id 2: @ViewBag.id2

</body>
</html>




Select Views folder and right click to select Add\New Item Menu

Select Web\ASP.NET in left side. Select Razor View Imports item and click Add button to Finish

In _ViewImports.cshtml file and TagHelpers library as below:

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers




Access Index action in Demo controller with following url: http://localhost:48982

Output

Access Demo2 action in Demo controller with following url: http://localhost:48982/demo/demo2/123

Output

Access Demo3 action in Demo controller with following url: http://localhost:48982/demo/demo3/123/p01

Output