CODEWITHSUNDEEP
asp.net-core.net-core
Melon NG
Melon NG

Reputation: 2994

How can I return 404 page view in controller?

My project has a 404 page already. I set it by the app.UseStatusCodePages() in startup.cs and it works well.

Now I have a controller:

[Route("{id:int}.html")]
public IActionResult Test(int id)
{
      var A=///some logic;
      if(A!=null)
      {
       return View(A);
      }
      else
      {
       return NotFound();
      }
}

Well, if the A is null, the browser only returns a This localhost page can’t be found page while not the 404 pages.

I don't want to use something redirect method, for it will return a 302 code while not only a 404 code.

How can I solve this? Thank you.

Upvotes: 1

Views: 3733

Answers (1)

Shoejep
Shoejep

Reputation: 4839

You could specify the path to your 404 page when returning a View.

e.g. return View("~/Views/Error/404.cshtml");

If you want to use it multiple times, I would suggest putting it in a function in a base class.

protected IActionResult 404View() {
    return View("~/Views/Error/404.cshtml");
}

NotFound returns a status code rather than a view, as explained in the summary

Creates an Microsoft.AspNetCore.Mvc.NotFoundResult that produces a Microsoft.AspNetCore.Http.StatusCodes.Status404NotFound

If you want to return a 404 status code and a View, you can just set the status code on the response before returning the View as described in How to return 404 with asp.net mvc view.

Response.StatusCode = 404;
return View("~/Views/Error/404.cshtml");

Upvotes: 3

Related Questions