执行异步操作asp.net mvc的动作之外(Perform Async operation asp

我希望能够从每个请求云数据库加载用户，并具有可在使用asp.net的MVC控制器的请求。问题是，目前的框架不支持从操作筛选做异步操作。所以OnActionExecuting，OnAuthorization方法不允许我这样做。例如，我有以下的代码不工作（所以不要尝试）..你得到一个异常：“异步模块或处理程序，同时异步完成操作仍然悬而未决“。

protected async override void OnAuthorization(AuthorizationContext filterContext)
{
  var user = filterContext.HttpContext.User;
  if (!user.Identity.IsAuthenticated)
  {
    HandleUnauthorizedRequest(filterContext);
    return;
  }

  using (var session = MvcApplication.DocumentStore.OpenAsyncSession())
  {
    User currentUser = await session.LoadAsync<User>(user.Identity.Name);
    if (currentUser == null)
    {
      HandleUnauthorizedRequest(filterContext);
      return;
    }

    filterContext.HttpContext.Items["User"] = currentUser;
  }
}

那么，有没有是能够做到这一点任何其他方式？我注意到有在基座控制器一个开始执行方法：

protected override IAsyncResult BeginExecute(RequestContext requestContext, AsyncCallback callback, object state)
{
  return base.BeginExecute(requestContext, callback, state);
}

我能做到这一点有可能？

现在的问题是三个月大的，所以我想你已经设法解决这个问题。无论如何，我会在这里我的解决方案，因为我必须做同样的事情。

我曾经从一些方法ParallelExtensionsExtras库。这是我的课：

public class AsyncControllerBase : Controller
{
    protected override IAsyncResult BeginExecute(System.Web.Routing.RequestContext requestContext, AsyncCallback callback, object state)
    {
        return ExecuteCoreAsync(requestContext, state).ToAsync(callback, state);
    }

    protected override void EndExecute(IAsyncResult asyncResult)
    {
        IAsyncResult baseAsyncResult = ((Task<IAsyncResult>)asyncResult).Result;
        base.EndExecute(baseAsyncResult);
    }

    protected virtual async Task<IAsyncResult> ExecuteCoreAsync(System.Web.Routing.RequestContext requestContext, object state)
    {
        await DoStuffHereOrInDerivedClassAsync();

        var baseBeginExecuteCompletion = new TaskCompletionSource<IAsyncResult>();

        AsyncCallback callback = ar =>
        {
            baseBeginExecuteCompletion.SetResult(ar);
        };

        // OnActionExecuting will be called at this point
        var baseAsyncResult = base.BeginExecute(requestContext, callback, state);

        await baseBeginExecuteCompletion.Task;

        return baseAsyncResult;
    }

    protected override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        base.OnActionExecuting(filterContext);
    }
}