/// <summary>
 /// 获取所有的现货_交易商品品种_持仓限制
 /// </summary>
 /// <returns></returns>
 private IList <XH_SpotPosition> GetAllSpotPositionFromWCF()
 {
     try
     {
         using (SpotTradeRulesClient client = GetClient())
             return(client.GetAllSpotPosition());
     }
     catch (Exception ex)
     {
         string errCode = "GT-8108";
         string errMsg  = "无法从管理中心获取现货品种持仓限制列表。";
         throw new VTException(errCode, errMsg, ex);
     }
 }