C#-等待AuthenticationManager.GetExternalLoginInfoAsync()返回null

当我第一次尝试使用外部提供程序登录时,此返回null,然后我再次按提供程序,一切都很好.我认为Cookie有点问题,因为删除所有Cookie并重试时会发生错误.

如果我删除所有Session和TempData,一切正常,那为什么呢？

public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
{
    var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
    if (loginInfo == null)
    {
        Elmah.ErrorSignal.FromCurrentContext().Raise(new NotImplementedException("Error ExternalLoginCallback"));
        TempData["_Error"] = "El incio de sesión con redes sociales no está disponible en este moemento, intente con su usuario y clave";
        return RedirectToAction("Login");
    }
}

解决方法:

我必须创建一个过滤器以下

 public class FilterBase : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
                if (!filterContext.IsChildAction && !filterContext.HttpContext.Request.IsAjaxRequest())
                {
                    /*
                     * MICROSOFT BUG
                     * https://stackoverflow.com/questions/20737578/asp-net-sessionid-owin-cookies-do-not-send-to-browser/21234614#21234614
                     * https://katanaproject.codeplex.com/workitem/197
                     */
                    filterContext.HttpContext.Session["Workaround"] = 0;

                }

        }
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {

        }
    }

标签：owin,asp-net-mvc-5,c
来源： https://codeday.me/bug/20191122/2057355.html