/// <summary>
 /// 修改栏目
 /// </summary>
 /// <param name="c"></param>
 /// <returns></returns>
 public int UpdateClass(normal_classContract c)
 {
     return ClassDao.UpdateClass(c.ToPO<normal_class>());
 }
 /// <summary>
 /// 添加栏目
 /// </summary>
 /// <param name="c"></param>
 /// <returns></returns>
 public int InsertClass(normal_classContract c)
 {
     return ClassDao.InsertClass(c.ToPO<normal_class>());
 }