Question

I use Asp.Net 4 and C#.

I would like to know how to change the default beahviour of Asp.Net customErrors.

In my Web.Config file I use this settings.

    <customErrors mode="On" defaultRedirect="/ErrorPages/Oops.aspx">
        <error statusCode="404" redirect="/ErrorPages/404.aspx" />
    </customErrors>

As you can expect if a page is not found a redirect occur to the custom page specified in Web.Config.

---

Requested page:

http://localhost:1372/nopagehere

---

Result page:

http://localhost:1372/ErrorPages/404.aspx?aspxerrorpath=/nopagehere

---

When I analyse the Http Header for the Result page I can see:

• a 404 Status when the page is not found
• a 302 Status for the new created url

I would like change this behavior in this way:

• when a request to a not found page has been made http://localhost:1372/nopagehere
• the result should be only http://localhost:1372/nopagehere (no 302 redirect) and with status code only on 404.

Any idea how to do it? Thanks for your time on this.

Answer 1

I guess you are looking for the redirectMode attribute on your <customErrors> section.

See: http://msdn.microsoft.com/en-us/library/h0hfz6fc.aspx

I think you want to set it to redirectMode="ResponseRewrite". This throws a 404 and shows the content of your 404 page, but without redirecting to the actual 404 page.