/// <summary>
 /// 更新对象
 /// </summary>
 /// <param name="infos">实体</param>
 /// <returns>返回是否成功</returns>
 public bool Update_infos(infos _infos)
 {
     try
     {
         DbHelperSQL.Update(_infos);
         return(true);
     }
     catch { return(false); }
 }