How do I access HttpContext in Server-side Blazor?

问题

I need to access HttpContext in a page (.cshtml) and in particular a request and then a cookie. Despite available, HttpContextAccessor always has a null value stored in its HttpContext property.

Any ideas would be much appreciated.

Thanks in advance.

EDIT: the Blazor version I use is: 0.7.0.

回答1:

Add the following to Blazor.Web.App.Startup.cs:

services.AddHttpContextAccessor();

You also need this in <component-name>.cshtml

@using Microsoft.AspNetCore.Http
@inject IHttpContextAccessor httpContextAccessor

回答2:

blazor.Sever to Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddServerSideBlazor<Client.Startup>();

    // HttpContextAccessor
    services.AddHttpContextAccessor();
    services.AddScoped<HttpContextAccessor>();
}

blazor.Shared

public class HttpContextAccessor
{
   private readonly IHttpContextAccessor _httpContextAccessor;

   public HttpContextAccessor(IHttpContextAccessor httpContextAccessor)
   {
        _httpContextAccessor = httpContextAccessor;
   }

   public HttpContext Context => _httpContextAccessor.HttpContext;
}

blazor.Client to App.cshtml

@inject blazor.Shared.HttpContextAccessor HttpContext
<Router AppAssembly=typeof(Program).Assembly />

@functions 
{      
    protected override void OnInit()
    {
       HttpContext.Context.Request.Cookies.**

       // Or data passed through middleware in blazor.Server
       HttpContext.Context.Features.Get<T>()
    }
}

Credits: https://github.com/aspnet/Blazor/issues/1554

来源：https://stackoverflow.com/questions/53817373/how-do-i-access-httpcontext-in-server-side-blazor

标签

httpcontext

blazor