LINQ从子列表中选择
如何使Linq查询从类别中获取所有Productpricediscounts?
public class ProductCategory { public List categoryProducts; } public class Product { public List productPrices; } public class Productprice { public List priceDiscounts; }
我的查询必须看起来像:
categoryProducts.Select(p => p.productPrices).Select(x => x.?!?!
问题是我本来期望x。 – intellisense建议priceDiscounts
,但我得到“list” – 值(如:“Any”,“Select”,“Distinct”等等。)
您需要使用SelectMany
才能访问priceDiscounts
:
var query = categoryProducts .SelectMany(x => x.productPrices) .SelectMany(y => y.priceDiscounts);
你需要Enumerable.SelectMany
var result = categoryProducts.SelectMany(x => x.productPrices) .SelectMany(x => x.priceDiscounts);