LINQ 到 SQL - 分组依据

Question

我有以下 LINQ-to-SQL 代码

var customerList = from cm in dc.ConsignmentMarginBreakdowns
                   join tm in dc.ConsignmentTripBreakdowns on new { Depot = cm.Depot, TripNumber = cm.TripNumber, TripDate = cm.TripDate } equals new { Depot = tm.Depot, TripNumber = tm.TripNumber, TripDate = tm.TripDate }
                   join sl in dc.SageAccounts on new { LegacyID = cm.Customer, Customer = true } equals new { LegacyID = sl.LegacyID, Customer = sl.Customer }
                   join ss in dc.SageAccounts on sl.ParentAccount equals ss.ID
                   where (tm.DeliveryDate >= dateRange1.FromDate && tm.DeliveryDate <= dateRange1.ToDate) || (dateRange2.FromDate != null && (tm.DeliveryDate >= dateRange2.FromDate && tm.DeliveryDate <= dateRange2.ToDate))
                   where tm.Depot == depotLetter
                   group cm by new { ss.Name, ss.ID } into cmg
                   select new
                   {
                       CustomerID = cmg.Key.ID,
                       CustomerName = cmg.Key.Name,
                       Sales1 = cmg.Where(a => a.DeliveryDate >= dateRange1.FromDate && a.DeliveryDate <= dateRange1.ToDate).Sum(a => a.TripSalesTotal),
                       Sales2 = dateRange2.FromDate != null ? tmg.Where(a => a.DeliveryDate >= dateRange2.FromDate && a.DeliveryDate <= dateRange2.ToDate).Sum(a => a.TripSalesTotal) : 0.00m
                   };

我遇到的问题是，当我选择时，“tm”中的“DeliveryDate”不在查询范围内。有什么想法可以在我的查询中获取这个值吗？

谢谢

Answer 1

只需创建另一个匿名类型

 group new { cm, tm } by new { ss.Name, ss.ID } into cmg

，这样您的查询将如下所示：

var customerList = from cm in dc.ConsignmentMarginBreakdowns
                   join tm in dc.ConsignmentTripBreakdowns on new { Depot = cm.Depot, TripNumber = cm.TripNumber, TripDate = cm.TripDate } equals new { Depot = tm.Depot, TripNumber = tm.TripNumber, TripDate = tm.TripDate }
                   join sl in dc.SageAccounts on new { LegacyID = cm.Customer, Customer = true } equals new { LegacyID = sl.LegacyID, Customer = sl.Customer }
                   join ss in dc.SageAccounts on sl.ParentAccount equals ss.ID
                   where (tm.DeliveryDate >= dateRange1.FromDate && tm.DeliveryDate <= dateRange1.ToDate) || (dateRange2.FromDate != null && (tm.DeliveryDate >= dateRange2.FromDate && tm.DeliveryDate <= dateRange2.ToDate))
                   where tm.Depot == depotLetter
                   group new { cm, tm } by new { ss.Name, ss.ID } into cmg
                   select new
                   {
                       CustomerID = cmg.Key.ID,
                       CustomerName = cmg.Key.Name,
                       Sales1 = cmg.Where(a => a.tm.DeliveryDate >= dateRange1.FromDate && a.tm.DeliveryDate <= dateRange1.ToDate).Sum(a => a.cm.TripSalesTotal),
                       Sales2 = dateRange2.FromDate != null ? tmg.Where(a => a.tm.DeliveryDate >= dateRange2.FromDate && a.tm.DeliveryDate <= dateRange2.ToDate).Sum(a => a.cm.TripSalesTotal) : 0.00m
                   };