Linq的使用

//1 Linq GroupBy
 //采购单明细数据，根据门店加条码分组，作为生成调拨单的明细

            var dataGroup = data.GroupBy(s => new { s.Tem_Store, s.Tem_Sku })
                .Select(s => new PH_generateTranBillFormModel 
                {
                    Tem_Sku = s.Key.Tem_Sku,
                    Tem_Store = s.Key.Tem_Store,
                    Tem_Qty = s.Sum(a => a.Tem_Qty),
                    Tem_Cummulation = s.Sum(a => a.Tem_Cummulation)
                }
            ).ToList();