public ActionResult SingleScoreList(int?id) { if (id == null) { if (TempData["id"] != null) { id = int.Parse(TempData["id"].ToString()); TempData["id"] = id; } return(View(_paper.SingleScoreInfoPaged(id, GetSingleScoreList(ClassID, SinglePaperID)))); } else { TempData["id"] = id; return(RedirectToAction("SingleExerciseScore")); } }