C＃Linq To Entities（SkipWhile not working）

Question

我正在計算基於股票交易的庫存，但我想排除那些發票未標記爲的股票交易IsStocked這是Nullable布爾值，我試圖通過使用SkipWhile這是行不通的，它簡單地計算所有交易的無論是發票IsStocked屬性爲true或false：

這裏是我的嘗試：

public double GetInStockQuantity(Warehouse warehouse, Entities db) 
{ 
    double res; 
    try 
    { 
     res = db.Stocks.AsNoTracking().Where(c => c.Product.ID == ID && c.WarehouseID == warehouse.ID). 
      AsNoTracking().AsEnumerable(). 
      SkipWhile(c => c.InvoiceItems.Any(q => q.Invoice.IsStocked == false)).Sum(q => q.Quantity); 
    } 
    catch (Exception) 
    { 
     res = 0; 
    } 
    return res; 
} 

Answer 1

您可以試試其中條款。

public double GetInStockQuantity(Warehouse warehouse, Entities db) 
    { 
     double res; 
     try 
     { 
      res = db.Stocks.AsNoTracking().Where(c => c.Product.ID == ID &&  c.WarehouseID == warehouse.ID). 
      AsNoTracking().AsEnumerable(). 
      Where(c => c.InvoiceItems.Any(q => q.Invoice.IsStocked == true)).Sum(q => q.Quantity); 
     } 
     catch (Exception) 
     { 
      res = 0; 
     } 
      return res; 
    }