public IActionResult Details(int?Id) { if (Id == null) { return(NotFound()); } else { if (HttpContext.Session.GetString("VaiTro") == "NguoiQuanTri") { ViewBag.Name = HttpContext.Session.GetString("Ten"); var chuDeViewDetails = new ChuDeViewDetails() { chuDe = chuDeService.GetChuDe(Id), baiHocs = chuDeService.GetBaiHocs(Id) }; return(View(chuDeViewDetails)); } return(Redirect(@"~/NguoiDung/Login")); } }