The 404 page works with problems in .NET7

Question

i make 404page IN .NET 7 with this code

app.UseStatusCodePagesWithReExecute("/Error404");

My problem is that when I enter the URL example.com/contactus/form/gdhsgdg, which does not exist, the 404 page does not show up. However, when I enter the URL example.com/contactus/formdsjhdshg, which also does not exist, the 404 page shows up.

I want the 404 page to be displayed by entering an address like example.com/contactus/form/gdhsgdg.

Answer 1

Do you want below?

In controller:

        [Route("Error/404")]
        public IActionResult Error404(int code)
        {

            return View("Error404");
        }

Error404 view:

this  is error 404

Program.cs:

app.UseStatusCodePagesWithReExecute("/Error/{0}");

Update:

Try to add a route attribute:

       [Route("/contactus/form/")]
        public IActionResult form()
        {
            return View();
        }

result: