private void EditComment(UpdateWeekComment updateWeekComment) { using (var workContext = new DefaultContext()) { var comment = workContext.WeekComments.FirstOrDefault(x => x.ID == updateWeekComment.ID); if (comment.Null()) { Message = "修改的评价不存在"; return; } var weekComment = updateWeekComment.UpdateComment(comment); workContext.ModifiedModel(weekComment); workContext.SaveChanges(); Flag = true; } }