ich eine sehr seltsame Sache gefunden:Warum die Variable immer Null
var PerformanceSingleList = TradePositionList//Compute the data for each stock everyday
.SelectMany((o, idx) => o.Select(p =>
{
//default variable
double CloseYesterday = TradePositionList.ElementAt(0).Where(q => q.Stock.Symbol == p.Stock.Symbol).Select(q => (double)q.Stock.Close).First();
int PositionYesterday = TradePositionList.ElementAt(0).Where(q => q.Stock.Symbol == p.Stock.Symbol).Select(q => q.Position).First();
int TradePositionToday = 0;
if (idx != 0) //idx cann't be 0 otherwise, idx - 1 throw a error
{
PositionYesterday = TradePositionList.ElementAt(idx - 1).Where(q => q.Stock.Symbol == p.Stock.Symbol).Select(q => q.Position).First();
CloseYesterday = TradePositionList.ElementAt(idx - 1).Where(q => q.Stock.Symbol == p.Stock.Symbol).Select(q => (double)q.Stock.Close).First();
TradePositionToday = TradePositionList.ElementAt(idx - 1).Where(q => q.Stock.Symbol == p.Stock.Symbol).Select(q => q.RealDesignTradeShare).First();
}
double Commission = Math.Abs(TradePositionToday) * (double)p.Stock.Close * C;
return new
{
p.Stock,
p.Position,
p.RealDesignPosition,
p.RealDesignTradeShare,
TradePositionToday,
Commission,
PLN = ((double)p.Stock.Close - CloseYesterday) * PositionYesterday + TradePositionToday * (double)p.Stock.Close - Math.Abs(TradePositionToday) * (double)p.Stock.Close * SA,
NAV = (double)p.Stock.Close * p.Position - Math.Abs(p.Position) * (double)p.Stock.Close * SA - Commission
};
}
).ToList()
).ToList();
Aber alle Commision in PerformanceSingleList
Null sind sogar TradePositionToday
nicht Null ist. Außerdem gibt es kein Problem, wenn ich meine kleinen Beispieldaten verwende, nur wenn ich echte Big Data verwende.
[61] { Stock = {{ Symbol = 1088 HK, Close = 12.860000000, Date = 3/7/2016 12:00:00 AM, Vol = 0.0490939300240106 }}, Position = -562, RealDesignPosition = 67, RealDesignTradeShare = 629, TradePositionToday = -562, Commission = 0, PLN = -7227.32, NAV = -7227.32 } <Anonymous Type>
Commission 0 double
NAV -7227.32 double
PLN -7227.32 double
Position -562 int
RealDesignPosition 67 int
RealDesignTradeShare 629 int
Stock { Symbol = "1088 HK", Close = 12.860000000, Date = {3/7/2016 12:00:00 AM}, Vol = 0.049093930024010565 } <Anonymous Type>
TradePositionToday -562 int
Setzen Sie einen Haltepunkt (F9) und debuggen Sie ihn. – Arshad
Vielleicht ist dein mysteriöses 'C' dann null? – ForNeVeR
@ ForNeVeR 'const doppelt C = 10/10000' nie sein 0 – user6703592