public async Task <IActionResult> Reply(QuestionReplyViewModel webModel)
        {
            if (ModelState.IsValid)
            {
                bool flag;
                if (string.IsNullOrEmpty(webModel.Id))
                {
                    return(Json(new
                    {
                        success = false,
                        msg = "回复学生疑问信息失败,问题编号为空"
                    }));
                }
                else
                {
                    //Update Question
                    flag = await _service.ReplyQuestionAsync(webModel, _context);
                }

                return(Json(new
                {
                    success = flag,
                    msg = flag ? "回复学生疑问信息成功" : "回复学生疑问信息失败"
                }));
            }

            return(Json(new
            {
                success = false,
                msg = this.ModelState.Keys.SelectMany(key => this.ModelState[key].Errors).FirstOrDefault().ErrorMessage
            }));
        }