public IActionResult EditExamModel(long id, [FromForm] ExamModel examModel) { if (!ModelState.IsValid) { ModelState.AddModelError(string.Empty, "修改错误"); return(View(examModel)); } var exam = _ExamService.GetExamModelById(id); exam.QClassId = examModel.QClassId; exam.Question = examModel.Question; exam.AnswerA = examModel.AnswerA; exam.AnswerB = examModel.AnswerB; exam.AnswerC = examModel.AnswerC; exam.AnswerD = examModel.AnswerD; exam.Explain = examModel.Explain; exam.Difficulty = examModel.Difficulty; _ExamService.EditExamModel(exam); return(RedirectToAction(nameof(GetAllExamModelsByQ), exam.QClassId)); }