Linq select 结果集中嵌套子集合查询

1.0   select  结果集中嵌套子集合查询

var sResult = (from a in details
                           select new
                           {
                               a.item_no,
                               item_barcods = (from b in Repository.t_im_sheet_barcode_qty
                                               where b.sheet_no==a.sheet_no  && b.item_no==a.item_no
                                               select new
                                               {
                                                   b.item_no,
                                                   b.item_barcode,
                                                   b.qty
                                               })

                           }).ToList();

2.0  内联结，关联条件多个联合查询

          var rlt = (from a in Repository.t_im_sheet_barcode_qty
                           join ib in Repository.t_bd_item_barcode on new { a.item_no, a.item_barcode } equals new { ib.item_no, ib.item_barcode }
                           join c in Repository.t_bd_color_code on ib.color_id equals c.color_id
                           join s in Repository.t_bd_size_code on ib.size_id equals s.size_id
                           where a.item_no == item.item_no && a.sheet_no == item.sheet_no
                           select new
                           {
                               a.item_barcode,
                               ib.color_id,
                               c.color_name,
                               ib.size_id,
                               s.size_name,
                               qty = a.qty,
                               inPrice = item.item_price,
                               item_name = item.item_name,
                               item_no = a.item_no,
                           }).ToList();