是否可以解决这一个不使用.ToList()?
请参阅下面的代码。
下面的代码将产生此输出。
{ id = 1, name = "sample 1", list = {'a','f','d'}},
{ id = 5, name = "sample 1", list = {'a','f','c'}},
{ id = 2, name = "sample 1", list = {'g','b'}},
{ id = 4, name = "sample 1", list = {'i','e','h'}},
{ id = 6, name = "sample 1", list = {'d','b','c'}},
{ id = 3, name = "sample 1", list = {'h','i','c'}},
感谢
RJ
IEnumerable<extra> eList = new List<extra>()
{
new extra{ id = 1, text = "a"},
new extra{ id = 2, text = "g"},
new extra{ id = 3, text = "i"},
new extra{ id = 4, text = "e"},
new extra{ id = 5, text = "f"},
new extra{ id = 6, text = "d"},
new extra{ id = 7, text = "c"},
new extra{ id = 8, text = "h"},
new extra{ id = 9, text = "b"}
};
IEnumerable<sample> sam = new List<sample>()
{
new sample{ id = 1, name = "sample 1", list = new List<int>{1,5,6}},
new sample{ id = 2, name = "sample 2", list = new List<int>{2,9}},
new sample{ id = 3, name = "sample 3", list = new List<int>{8,3,7}},
new sample{ id = 4, name = "sample 4", list = new List<int>{3,4,8}},
new sample{ id = 5, name = "sample 5", list = new List<int>{1,5,7}},
new sample{ id = 6, name = "sample 6", list = new List<int>{6,9,7}}
};
var sorted = (from d1 in sam
select new
{
name = d1.name,
id = d1.id,
list =
(
from d2 in d1.list
join e in eList on d2 equals e.id
select e.text
).OrderBy(item => item).ToList()
}).OrderBy(item => item.list.FirstOrDefault());
BTW你的命名约定是痛苦的。 – Stilgar
这只是一个练习....命名不是我在这里的关注...谢谢 – user1120260
老实说,有一次,我想你想'ToList'在这里。否则,你的'list'成员包含一个'IEnumerable',而不是'List',并且每次枚举它时都会重新执行连接。如果您不介意这一点,您可以通过listerally删除“ToList”调用,并且顺序仍然相同。 – Rawling