LINQ JOIN + GROUP BY + SUM

Question

我有两个LINQ语句，我想将它们合并为一个，但对于我的生活，我无法实现它。我不能让分组在第一个语句中工作。 它抱怨TotalBuy和TotalSell属性不存在，虽然不抱怨AmountTC和AmountAUD。

这应该很简单。有什么想法吗？

var itineraryItems = 
    from ii in this.ItineraryItemRecords 
    join t in this.TransactionRecords on ii.OperatorID equals t. 
    TransactionActor.OperatorID into g select new { 
    OperatorID = ii.OperatorID, TotalBuy = g.Sum(i = >ii.TotalBuy) 
     , TotalSell = g.Sum(i = >ii.TotalSell) 
     , PaidTC = (0 - (g.Sum(t = >t.AmountTC))) 
     , PaidAUD = (0 - (g.Sum(t = >t.AmountAUD))) 
}; 

var itineraryItemz = 
    from i in itineraryItems group i by i.OperatorID into g select new { 
    OperatorID = g.Key, TotalBuy = g.Sum(i = >i.TotalBuy) 
     , TotalSell = g.Sum(i = >i.TotalSell) 
     , PaidTC = (0 - (g.Sum(i = >i.PaidTC))) 
     , PaidAUD = (0 - (g.Sum(i = >i.PaidAUD))) 
}; 

作为边注，ItineraryItemRecords和TransactionRecords是由SubSonic处理类类别。

这真的应该很简单，所以任何帮助，将不胜感激。

问候， 约翰

Answer 1

，稍有差错，更正为：

var itineraryItems = from ii in this.ItineraryItemRecords 
    join t in this.TransactionRecords on ii.OperatorID equals t.TransactionActor.OperatorID 
    into g 
    select new 
    { 
     OperatorID = ii.OperatorID 
     //, TotalBuy = g.Sum(i => ii.TotalBuy) 
     , TotalBuy = g.Sum(i => i.TotalBuy) 
     //, TotalSell = g.Sum(i => ii.TotalSell) 
     , TotalSell = g.Sum(i => i.TotalSell) 
     , PaidTC = (0 - (g.Sum(t => t.AmountTC))) 
     , PaidAUD = (0 - (g.Sum(t => t.AmountAUD))) 
    }; 

我建议不要使用重新标识 - 将有助于避免在未来这些错误。