Access HttpContext in a Blazor Razor Component

Before .NET 8, accessing the HttpContext in a Razor Component wasn’t possible. But that all changes in .NET 8.

Accessing HttpContext in .NET 8 Razor Components

HttpContext can now be accessed via a [CascadingParameter] in Razor Components.

@code {
    [CascadingParameter]
    public HttpContext? HttpContext { get; set; }
}

@if (HttpContext.User.Identity.IsAuthenticated) 
{
    <h2>Logged in user: @HttpContext.User.Identity.Name</h2>
}

This is handy if you need to access:

• User authentication info
• Session variables
• Headers

The catch:

The component must be statically rendered (SSR mode).

This will not work if your components render mode is WASM or Server (Websockets).