Return NotFound() or unhandled exception with a 404 page

Question

I'm currently using ASP.NET Core, how do I set a 404 default page for unhandled exceptions or NotFound()?

IActionResult Foo()
{
    throw new Exception("Message!");
}

IActionResult Bar()
{
    return NotFound("Message!");
}

I think there is a IApplicationBuilder.UseExceptionHandler method to set an error page, but I don't know how to configure it.

Please check here https://stackoverflow.com/questions/37690114/asp-net-core-how-to-return-a-specific-status-code-and-no-contents-from-control — Carlos Ferreira, May 29 '17 at 15:39

score 2 · Accepted Answer · edited May 29 '17 at 15:46

2

This is explained here under Configuring status code pages

app.UseStatusCodePagesWithRedirects("/error/{0}");

You'll need an ErrorController which could look like:

public class ErrorController : Controller 
{
    public IActionResult Index(string errorCode)
    {
        return View(errorCode);
    }
}

Your views (in the Error folder) would need to be called:

...etc

edited May 29 '17 at 15:46

Camilo Terevinto

answered May 29 '17 at 15:42

Alex

After I make these pages, if I `return NotFound("MyError!")` how do I catch the error string? – MiP May 29 '17 at 16:12
1

Using this method, you can't... It just redirects based on status code – Alex May 29 '17 at 16:13

1 Answers1