public ActionResult EditCourseUnit(Course_UnitDetail model)
        {
            Course_UnitDetailBLL bll = new Course_UnitDetailBLL();

            if (bll.Update(model))
            {
                return Json(new { Result = true, Msg = "修改成功!" }, JsonRequestBehavior.AllowGet);
            }
            else
            {
                return Json(new { Result = false, Msg = "修改失败!" }, JsonRequestBehavior.AllowGet);
            }
        }
        public ActionResult DisplayCourseUnit(int id)
        {
            Course_UnitDetailBLL bll = new Course_UnitDetailBLL();

            Course_UnitDetail model = bll.GetModel(id,"Delflag = 0");

            //设置是否显示
            if (model.Display)
            {
                model.Display = false;
            }
            else
            {
                model.Display = true;
            }

            if (bll.Update(model))
            {
                return Json(new { Result = true,  Display= model.Display}, JsonRequestBehavior.AllowGet);
            }
            else
            {
                return Json(new { Result = false, Display = model.Display}, JsonRequestBehavior.AllowGet);
            }
        }