LINQ to Objects问题 [英] LINQ to Objects question

问题描述

我正在编写一种方法，该方法将传递给List< AssetMovements> AssetMovements看起来像

I am writing a method that is passed a List<AssetMovements> where AssetMovements looks something like

public class AssetMovements
{
  public string Description { get; set; }
  public List<DateRange> Movements { get; set; }
}

我希望能够将这些对象展平到所有Movements的列表中，而与Description无关，并且试图找出LINQ查询，我需要这样做.我以为

I want to be able to flatten out these objects into a list of all Movements regardless of Description and am trying to figure out the LINQ query I need to do this. I thought that

from l in list select l.Movements

将执行此操作并返回IEnumerable< DateRange>.但相反，它返回IEnumerable< List< List< DateRange>>.而且我不太确定如何解决这个问题.有什么建议吗?

would do it and return IEnumerable<DateRange> but instead it returns IEnumerable<List<DateRange>> and I'm not really sure how to correct this. Any suggestions?

推荐答案

已经有人问过这个了.您需要使用SelectMany()方法，该方法可以使列表列表平坦化.所以:

This one's been asked before. You want the SelectMany() method, which flattens out a list of lists. So:

var movements = list.SelectMany(l => l.Movements);

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