private void WeiTuoCallBack(IAsyncResult ar) { GetOrdersDelete god = ar.AsyncState as GetOrdersDelete; JObject jomsg = god.EndInvoke(ar); if (jomsg != null) { double time = System.Convert.ToDouble(jomsg["OrderUpdateTimeStamp"].ToString()); string code = jomsg["code"].ToString(); if (time > OrderUpdateTimeStamp[code]) { OrderUpdateTimeStamp[code] = time; QueryWeiTuo(jomsg); } } }