我想将复杂的对象映射到两个内部连接查询的简化结果中。我知道我们已经解决了映射内部连接的解决方案，但我想映射两个内部连接的结果。 8 [* Q: K$ s' e. O. h$ L这是场景： . v: u# T- a0 ?% G6 z, y我的课程是：4 `! {- w3 x* d
public class Order public int id { get; set; public string order_reference { get; set; public string order_status { get; set; public List OrderLines { get; set; }}public class OrderLine{ public int id { get; set; public int order_id { get; set; public string product_number { get; set; public List OrderLineSizes { get; set; }}public class OrderLineSize{ public int id { get; set; public int order_line_id { get; set; public string size_name { get; set; }}订单将OrderLines并将作为列表OrderLine作为OrderLineSizes作为列表。" h o9 h' ]7 ?4 s! s3 t: c 现在，这是我想要的List使用正确数据填充查询的基础：! x5 V6 T ~" ` O0 e( a
SELECT *FROM orders_mstr oINNER JOIN order_lines ol ON o.id = ol.order_idINNER JOIN order_line_size_relations ols ON ol.id = ols.order_line_id到目前为止，我已经尝试过这 , U! j* Q r1 q1 }* |+ `: P, r, TorderDetail = o); if (orderDetail.OrderLines == null) orderDetail.OrderLines = new List()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；orderDetail.OrderLines.Add(ol); return orderDetail; .AsQueryable()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；var resultList = lookup.Values;orderDetail = o); } if (orderDetail.OrderLines == null) orderDetail.OrderLines = new List(); orderDetail.OrderLines.Add(ol); return orderDetail; }).AsQueryable(); var resultList = lookup.Values;我可以成功地使用这种方法OrderLine映射订单对象，但我也想填写正确的数据OrderLineSizes。4 L. f4 y% z) ?! \ f1 K$ ^( j
* H! L" f9 D+ P解决方案: & p3 l& E- y' w# O* J/ b 我尽力解决。* q6 J* G! h2 a6 }
这是根据我的更简单，更准确的解决方案： o+ r2 Z# k0 v' Y
var lookup = new Dictionary<i>()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；var lookup2 = new Dictionary<i>()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；connection.Query(@" SELECT o.*,ol.*,ols.* FROM orders_mstr o INNER JOIN order_lines ol ON o.id = ol.order_id INNER JOIN order_line_size_relations ols ON ol.id = ols.order_line_id ",(o,ol,ols) => OrderDetail orderDetail; if (!lookup.TryGetValue(o.id,out orderDetail)) lookup.Add(o.id,orderDetail = o); OrderLine orderLine; if (!lookup2.TryGetValue(ol.id,out orderLine)) lookup2.Add(ol.id,orderLine = ol); orderDetail.OrderLines.Add(orderLine); orderLine.OrderLineSizes.Add(ols); return orderDetail; ).AsQueryable()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；var resultList = lookup.Values.ToList()；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；；
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2023-09-14
