string kjid="0001";


 if (Cache[kjid] == null)

   {

     S_space sp = Lib.S_spaceLib.SelectOne(kjid);

     Cache.Add(kjid, sp, null, DateTime.Now.AddHours(3), TimeSpan.Zero, CacheItemPriority.Normal, null);

   }

          S_space  spW = (S_space)Cache[kjid];


Cache.Remove(kjid);

        S_space spp = Lib.S_spaceLib.SelectOne(kjid);

        Cache.Add(kjid, spp, null, DateTime.Now.AddHours(3), TimeSpan.Zero, CacheItemPriority.Normal, null);