<authorizeview>在 Visual Studio 中本地运行但在 IIS 上运行时不起作用？</authorizeview>

Question

I created a new Blazor server side application using Visual Studio 2019. I selected Windows authentication.

The following component ( \BlazorApp1\BlazorApp1\Shared\LoginDisplay.razor ) displays "Hello, Domain\Username." on the top right of the page in the browser in the application.

<AuthorizeView>
    Hello, @context.User.Identity.Name!
</AuthorizeView>

Then I publish it to IIS on Windows Server 2019 R2 in the same Windows domain (Company intranet network). However, browsing the page doesn't show the message in?

How is the client authentication information passed to the Blazer server?

Answer 1

There is good example on Microsoft docs for getting authentication user details:

@page "/"
@using Microsoft.AspNetCore.Components.Authorization
@inject AuthenticationStateProvider AuthenticationStateProvider

<button @onclick="@LogUsername">Write user info to console</button>

@code {
    private async Task LogUsername()
    {
        var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
        var user = authState.User;

        if (user.Identity.IsAuthenticated)
        {
            Console.WriteLine($"{user.Identity.Name} is authenticated.");
        }
        else
        {
            Console.WriteLine("The user is NOT authenticated.");
        }
    }
}

To answer

How is the client authentication information passed to the Blazer server?

If authentication state data is required for procedural logic, such as when performing an action triggered by the user, obtain the authentication state data by defining a cascading parameter of type Task:

@page "/"

<button @onclick="@LogUsername">Log username</button>

@code {
    [CascadingParameter]
    private Task<AuthenticationState> authenticationStateTask { get; set; }

    private async Task LogUsername()
    {
        var authState = await authenticationStateTask;
        var user = authState.User;

        if (user.Identity.IsAuthenticated)
        {
            Console.WriteLine($"{user.Identity.Name} is authenticated.");
        }
        else
        {
            Console.WriteLine("The user is NOT authenticated.");
        }
    }
}

for details refer:

https://learn.microsoft.com/en-us/aspnet/core/security/blazor/?view=aspnetcore-3.0&tabs=visual-studio