public static DateTime Offset(MongoDataReader w, BaseDataItemClass SecItem, DateTime dt, int N, Cycle cyc)
{
DateTime begt = SecItem.Ipo_date;
if (SecItem.SecType == SecType.Index)
{
//指数不停牌，自然日按交易日*7/5，放大到10/2=2倍指定开始日
switch (cyc)
{
case Cycle.Day:
{
begt = dt.AddDays(-2 * N);
break;
}
case Cycle.Week:
{
begt = dt.AddDays(-7 * N);
break;
}
case Cycle.Month:
{
begt = dt.AddMonths(N);
break;
}
case Cycle.Year:
{
begt = dt.AddYears(N);
break;
}
}
}
if (begt.CompareTo(SecItem.Ipo_date) < 0)//任何情况（index的ipo日期为1899-12-31）如果开始日期小于ipo日期，开始日期设置为Ipo日期。
{
begt = SecItem.Ipo_date;
}
BaseDataTable tb = CommMGToolClass.GetBaseSerialData(
w,
SecItem.WindCode,
begt,
dt,
Cycle.Day,
PriceAdj.UnDo,
BaseDataPoint.trade_status, BaseDataPoint.sec_type);
BaseDataTable ttb = tb.AvaliableData;
if (ttb.Count == 0)
{
return(dt); //如果数据为空，返回回览日
}
if (ttb.Count > N)
{
return(((BaseDataItemClass)ttb[ttb.Count - N]).DateTime);
}
return(((BaseDataItemClass)ttb[0]).DateTime);
}
public static DateTime LastTradeDay(MongoDataReader w, string SecCode, DateTime dt)
{
BaseDataTable tb = CommMGToolClass.GetBaseSerialData(w, SecCode, dt.AddDays(-1000), dt, Cycle.Day, PriceAdj.UnDo, BaseDataPoint.trade_status, BaseDataPoint.sec_type, BaseDataPoint.close);
BaseDataTable ttb = tb.AvaliableData;
if (ttb.Count == 0)
{
return(DateTime.MinValue);
}
return(((BaseDataItemClass)ttb[ttb.Count - 1]).DateTime);
}
