tehnomarket/TechMarket/Controllers/HomeController.cs

using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using TechMarket.Models;

namespace TechMarket.Controllers;

public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }

    [Route("catalog")]
    public IActionResult Catalog()
    {
        return View();
    }

    [Route("about")]
    public IActionResult About()
    {
        return View();
    }

    [Route("contacts")]
    public IActionResult Contacts()
    {
        return View();
    }

    [HttpPost]
    [Route("contacts")]
    public IActionResult Contacts(ContactViewModel model)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        TempData["Success"] = "Спасибо, " + model.Name + "! Ваше сообщение принято, мы скоро ответим";

        return RedirectToAction(nameof(Contacts));
    }

    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
    public IActionResult Error()
    {
        if (HttpContext.Response.StatusCode == 404)
        {
            return View("NotFound");
        }

        return View(new ErrorViewModel
        {
            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier
        });
    }
}