How to check if user is authenticated in Razor pages of .Net Core 2.0

Question

I would like to check if a user is logged in in an ASP.NET Core 2.0 application in a Razor page. The following code worked in .NET 4.6.1:

@if (!Request.IsAuthenticated)
{
    <p><a href="@Url.Action("Login", "Account")" class="btn btn1-success btn-lg" role="button" area="">Sign In &raquo;</a></p>
}

How can I do this in Core 2.0?

Possible duplicate of [Check if user is logged in with Token Based Authentication in ASP.NET Core](https://stackoverflow.com/questions/41315903/check-if-user-is-logged-in-with-token-based-authentication-in-asp-net-core) — Vano Maisuradze, Feb 22 '19 at 07:49

Tseng · Accepted Answer · 2017-08-27T12:00:28.827

128

Edit: David is right of course.

Just check if User or HttpContext.User.Identity.IsAuthenticated is true or not.

@if(!User.Identity.IsAuthenticated) 
{
    ...
}

edited Aug 27 '17 at 12:00

answered Aug 25 '17 at 19:35

Tseng

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5

This isn't correct. The user isn't null even when you're not authenticated. – davidfowl Aug 27 '17 at 11:12
1

I just change mine to `@if (User.Identity.IsAuthenticated) { ... }` and it works as expected – saviour123 Jan 02 '18 at 16:16
It's works for on asp.Net Core 2.0 ~ @if (User.Identity.IsAuthenticated) {} ~ – PatsonLeaner May 07 '19 at 06:54
Works on .NET core 3.1 too – Charlie Oct 04 '22 at 05:30

score 1 · Answer 2 · answered Jun 15 '20 at 18:26

I've always used this option.

 private readonly SignInManager<IdentityUser> _signInManager;

        public HomeController(SignInManager<IdentityUser> signInManager)
        {
            _signInManager = signInManager;
        }

        public IActionResult Index()
        {
            if (_signInManager.IsSignedIn(User)) //verify if it's logged
            {
                return LocalRedirect("~/Page");
            }
            return View();
        }

Hope it helps someone!

How to check if user is authenticated in Razor pages of .Net Core 2.0

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