I created a new project using a .NET 9 Blazor Web App template. And followed the documentation for adding the authentication state provider.
My understanding from the documentation is that the all I need to do is add builder.Services.AddCascadingAuthenticationState(); to my Program.cs which I did.
I am not using a custom AuthenticationStateProvider.
Then I should simply be able to cascade the authentication state into my page. [CascadingParameter] private Task<AuthenticationState>? authenticationState { get; set; }
Then await during my OnInitializedAsync() to receive my current users identity.
protected override async Task OnInitializedAsync() { if (authenticationState is null) { authMessage = "Unable to determine authentication state."; return; } var authState = await authenticationState; var user = authState?.User; if (user?.Identity is not null && user.Identity.IsAuthenticated) { authMessage = $"{user.Identity.Name} is authenticated."; } else { authMessage = "The user is NOT authenticated."; } } However IsAuthenticated always equals false. This is problematic because I have a two .NET 7 Blazor Server apps that were upgraded to .NET 8 that use cascading authentication. And they are able to receive the authenticated user via the authentication state.
What I have tried is adding more services to in my Program.cs
builder.Services.AddAuthorization(); builder.Services.AddAuthorizationCore(); builder.Services.AddCascadingAuthenticationState(); This had no effect.
I ensured the launchSettings.json Windows authentication is true and anonymous is false to match my other projects.
"iisSettings": { "windowsAuthentication": true, "anonymousAuthentication": false, "iisExpress": { "applicationUrl": "http://localhost:50496", "sslPort": 44397 } I tried wrapping the Routes.razor with the cascading authentication state. Which if my understanding of the documentation is correct. Shouldn't be necessary.
<Microsoft.AspNetCore.Components.Authorization.CascadingAuthenticationState> <Router AppAssembly="typeof(Program).Assembly"> <Found Context="routeData"> <RouteView RouteData="routeData" DefaultLayout="typeof(Layout.MainLayout)" /> <FocusOnNavigate RouteData="routeData" Selector="h1" /> </Found> </Router> </Microsoft.AspNetCore.Components.Authorization.CascadingAuthenticationState> I then also tried wrapping the App.razor in the cascading authentication state. I tried this because this is where in my other functional apps the cascading authentication state is located.
<Microsoft.AspNetCore.Components.Authorization.CascadingAuthenticationState> <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <base href="/" /> <HeadOutlet @rendermode="@InteractiveServer" /> </head> <body class="k-body"> <Routes @rendermode="@InteractiveServer" /> <script src="_framework/blazor.web.js" autostart="false"></script> <script> document.addEventListener("DOMContentLoaded", function() { Blazor.start(); }); </script> </body> </html> </Microsoft.AspNetCore.Components.Authorization.CascadingAuthenticationState> I expected that one of these changes would lead to user.Identity.IsAuthenticated to be true. But I am still unable to successfully configure my projects authentication state.
However I can retrieve the Name value if I use this method. var userName = System.Security.Principal.WindowsIdentity.GetCurrent().Name; This variation works albeit only for Windows systems.
