拼接xml时出现内存溢出解决办法

来源：互联网发布：方块音乐软件编辑：程序博客网时间：2024/06/18 09:53
/// designed by Alex                /// 解决内存溢出问题，不可使用迭代器和foreach                /// 循环遍历List, 别生成xml，一边释放                /// 反向遍历，相当于出栈，避免索引顺序乱的问题                /// 反转List.                if (zrate.RateList != null && zrate.RateList.Count != 0)                {                    log.Debug("反转list");                    zrate.RateList.Reverse();                    log.Debug("循环遍历Zrate List 生成xml");                    int policySize = zrate.RateList.Count;                    for (int index = policySize - 1; index > -1; index--)                    {                        SplitPolicy item = zrate.RateList[index];                        string strChangePnr = item.IsChangePnr ? "1" : "0";                        string strCabin = item.Cabin;                        try                        {                            strCabin = strCabin.Replace("/", "");                        }                        catch { }                        decimal c = item.Rate + item.RuleRate;                        string d = item.IsAutoTicket ? "1" : "0";                        string strWeekNum = item.WeekNum;                        if (strWeekNum != "")                        {                            strWeekNum = strWeekNum.Replace("/", ",");                        }                        string ZtFlightNumber = "";                        try                        {                            ZtFlightNumber = item.ApplyFlightNumber.Replace('/', ',');                        }                        catch { }                        string ZtNoFlightNumber = "";                        try                        {                            ZtNoFlightNumber = item.NotApplyFlightNumber.Replace('/', ',');                        }                        catch { }                        string WorkTimeWeekDay = "";                        string RefundWorkTimeWeekDay = "";                        //工作时间                        for (int i = 0; i < 5; i++)                        {                            WorkTimeWeekDay = WorkTimeWeekDay + item.WorkTimeWeekDay + ",";                            RefundWorkTimeWeekDay = RefundWorkTimeWeekDay + item.RefundTimeWeekDay + ",";                        }                        //休息日                        for (int i = 0; i < 2; i++)                        {                            WorkTimeWeekDay = WorkTimeWeekDay + item.WorkTimePlayDay + ",";                            RefundWorkTimeWeekDay = RefundWorkTimeWeekDay + item.RefundTimePlayDay + ",";                        }                        info.Append("<Item Id='" + item.ID + "' State='" + item.Status + "' IsChangePnr='" + strChangePnr + "' ");                        info.Append("ProviderWorkTime='" + WorkTimeWeekDay.Trim(',') + "' PorviderVWorkTime='" + RefundWorkTimeWeekDay.Trim(',') + "'>");                        info.Append(item.DepartCode.Replace("/", ",") + "|" + item.ArriveCode.Replace("/", ",") + "|" + item.AirCompany + "|" + item.TripType + "|");                        info.Append(ZtFlightNumber + "|" + ZtNoFlightNumber + "|" + strWeekNum + "|" + item.TicketType + "|");                        info.Append(strCabin + "|" + c.ToString("0.000") + "|" + item.SaleBeginTime.ToString("yyyy-MM-dd") + ",");                        info.Append(item.SaleEndTime.ToString("yyyy-MM-dd") + "|" + item.TravelBeginTime.ToString("yyyy-MM-dd") + ",");                        info.Append(item.TravelEndTime.ToString("yyyy-MM-dd") + "|" + item.OfficeID + "|");                        info.Append(item.AddTime.ToString("yyyy-MM-ddTHH:mm:ss.fff") + "|" + item.ModifyTime.ToString("yyyy-MM-ddTHH:mm:ss.fff") + "|");                        info.Append(item.SupplierCode + "|" + item.Remark + "|" + d);                        info.Append("</Item>");                        //同时remove item                        zrate.RateList.RemoveAt(index);                        //每10000条调用一次gc，回收前一百条被remove的数据                        if (0 == index % 10000)                        {                            GC.Collect();                        }                    }                }                else                {                    log.Error("zrate里的RateList为空！");                }            }            else            {                info.Append("<OTA_Alter_AirFareRS>");                info.Append("<Error Code=\"" + zrate.Msg + "\" ShortText=\"" + zrate.Msg + "\" />");            }            info.Append("</OTA_Alter_AirFareRS>");            //WriteLog.WriteErrorLogDataInteraction(info.ToString(), "变动政策返回信息");            log.Debug("返回xml成功");            return info.ToString();
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