LINQ GROUP BY和获得最新值 [英] LINQ group by and getting latest value

问题描述

说我有这样的结构：

class SomeObject
   Public Name as String
   Public Created as Date
   ...
end class

我有一个列表（的SomeObject），这对每一个名字而不同时期的多个条目。我想选择每个名称最新（最大的创值）的对象。

I have a List(of SomeObject), which has multiple entries for each name with different times. I'd like to select the newest (largest Created value) object for each Name.

由于：

Name   Created
A      2010-04-16     *
A      2010-04-15
B      2010-04-12
B      2010-04-13     *
C      2010-04-16     *

我想去捡与*的对象，他们身边。

I'd like to pick the objects with the * beside them.

使用LINQ这可能吗？

Is this possible using LINQ?

推荐答案

有：

var maxObjects =
    from o in myList
    group o by o.Name into g
    select new { Name = g.Key, Created = g.Max(o => o.Created) };

请参阅 101 LINQ的样本来看看的LINQ如何使用。

See 101 Linq samples to see how Linq can be used.

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