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Asked: 2026-05-18T05:40:38+00:00

I have an ASP.NET MVC app and am using Forms auth. When going to

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I have an ASP.NET MVC app and am using Forms auth. When going to a page that requires authentication, meaning there is an [Authorize] attribute on the controller action, it redirects the user to the login page with a return url like http://localhost/Login?ReturnUrl=/MyAuthorizedUrl.

This is how my config is setup:

<authentication mode="Forms">
  <forms loginUrl="~/Login" timeout="2880" defaultUrl="~/" />
</authentication>

This is how I’m getting the redirect url:

var url = FormsAuthentication.GetRedirectUrl( model.Email, model.RememberMe );

This always returns the default url.

What is causing this?

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1 Answer

  1. Editorial Team

    I assume you would like to get “MyAuthorizedUrl” as the result of FormsAuthentication.GetRedirectUrl?

    You’ll need to insert a hidden input field that mirrors ReturnUrl=/MyAuthorizedUrl, e.g. name="ReturnUrl" value="/MyAuthorizedUrl".

    The reason is that the login page is requested via GET with the ReturnUrl, but the POST goes to /Login (without any parameters).

    Alternatively change the form action attribute to include the ReturnUrl parameter.

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