There is a problem with the Products/List string in _Layout. cshtml. When I launch the site and click on the Products tab, there is no redirection to the sheet section and it gives a 404 error.Instead of the address path specified in _Layout. cshtml (asp-action= "Products/List"), it outputs "Products%2FList". Is the problem related to the routing settings? However, if you enter the full address manually: https://localhost:44332/Products/List, then the controller finds it without any problems.
Layout:
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Products/List">Products</a>
</li>
ProductsController :
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace AppForPryaniki.Controllers
{
public class ProductsController : Controller
{
private ProductReader reader;
public ProductsController()
{
reader = new ProductReader();
}
// Products/List
public IActionResult List()
{
List<Product> products = reader.ReadFromFile();
return View(products);
}
// Products/Details/1
public IActionResult Details(int id)
{
List<Product> products = reader.ReadFromFile();
Product product = products.Where(x => x.Id == id).FirstOrDefault();
if (product != null)
{
return View(product);
}
else
{
return NotFound();
}
}
}
}
Settings routing:
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
}
HomeController
namespace AppForPryaniki.Controllers
{
public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
public HomeController(ILogger<HomeController> logger)
{
_logger = logger;
}
public IActionResult Index()
{
Product product = new Product();
product.Id = 1;
product.Name = "Test";
return View(product);
}
public IActionResult Privacy()
{
return View();
}
[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
public IActionResult Error()
{
return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
}
public IActionResult Products()
{
return View();
}
public IActionResult Test()
{
return View();
}
}
}
You have two mistakes here:
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Products/List">Products</a>
Firstly, you are wanting to route to an action on your ProductsController
, and so Home
is the wrong value to use for asp-controller
. Instead, you want to use Products
.
And secondly, the value for asp-action
is also wrong, because the action you're wanting is called List
, not Products/List
. The correct value is List
.
Here is what it looks like after the changes:
<a class="nav-link text-dark" asp-area="" asp-controller="Products" asp-action="List">Products</a>
You were halfway to solving this on your own when you checked https://localhost:44332/Products/List
to see if it worked. When you're able to navigate to something directly like that, it's always a sign the link you tried to generate in a view is where the problem lies.