[英]LINQ grouping and selecting into properties
我仍在尝试摆脱LINQ的困扰,并为此遇到了麻烦。 我有一个List<Data>
像这样:
GroupId|SectionId|Content
-------------------------
1| 3|part1-2
1| 7|part1-1
3| 3|part3-2
1| 1|part1-3
3| 1|part3-3
3| 7|part3-1
我想将其转换为IEnumerable<AnonymousType>
,其中每个AnonymousType
代表一个GroupId
并且每个属性都链接到特定的SectionId
。 换句话说,您最终将得到如下结果:
{
{
GroupId = 1,
Part1 = "part1-1", // From SectionId == 7
Part2 = "part1-2", // From SectionId == 3
Part3 = "part1-3", // From SectionId == 1
},
{
GroupId = 3,
Part1 = "part3-1", // From SectionId == 7
Part2 = "part3-2", // From SectionId == 3
Part3 = "part3-3", // From SectionId == 1
}
}
像这样:
from r in something
group r by r.GroupId into g
select new {
GroupId = g.Key,
Part1 = g.First(r => r.SectionId == 7).Content,
Part2 = g.First(r => r.SectionId == 3).Content,
Part3 = g.First(r => r.SectionId == 1).Content
}
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