如何在类库.net Core 5中访问会话

Question

是否有办法在类库中访问HttpContext.session?(我用的是。net Core 5)我有configuration全部设置，也使用microsoft.AspNetCore.Http，但我仍然无法访问会话变量。如果没有办法做到这一点，那么执行需要当前用户ID/标识的操作的最佳方法是什么?

Answer 1

正如@King King回答的那样，你可以将IHttpContextAccessor注入到类中。

步骤1添加会话服务

public void ConfigureServices(IServiceCollection services)
{
services.AddControllersWithViews();
services.AddSession();
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>(); 
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
...
app.UseAuthorization();
app.UseSession();
app.UseEndpoints(endpoints =>
...
}

步骤2在自定义类中访问Session

public class SessionTest
{
private readonly IHttpContextAccessor _httpContextAccessor;
private ISession _session => _httpContextAccessor.HttpContext.Session;
public SessionTest(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public void setSession()
{
_session.SetString("Test", "Hello World!");
}
public void getSession()
{
var message = _session.GetString("Test");
...
}
}

step3通过自定义类访问会话

public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
private readonly IHttpContextAccessor _httpContextAccessor;
private readonly ISession _session;
public HomeController(IHttpContextAccessor httpContextAccessor,ILogger<HomeController> logger)
{
_logger = logger;
_httpContextAccessor = httpContextAccessor;
_session = _httpContextAccessor.HttpContext.Session;
}
public IActionResult Index()
{
SessionTest session = new SessionTest(_httpContextAccessor);
session.setSession();
session.getSession();
return View();
}
}