查找集合中的下一个记录:LINQ [英] Find next record in a set: LINQ

问题描述

我有一个所有具有id属性的对象列表

I have a list of objects which all have an id property

例如

1、10、25、30、4

1, 10, 25, 30, 4

我有一个currentId，我需要在列表中找到下一个ID

I have a currentId and I need to find the next Id in the list

因此，例如，当前ID设置为25，我需要返回ID为30的对象.此后的对象为4.

So for example current Id is set to 25, I need to return the object with an id of 30. The one after that would be 4.

我将如何在LINQ中优雅地做到这一点?

How would I do this elegantly in LINQ?

编辑

该列表由"sort"属性排序.因此，您不能只按ID排序，因为那样会使订单搞乱.

The list is ordered by a "sort" property. So you cannot just order by id, as that would mess up the order.

推荐答案

无需重新排序(请注意，由于我认为我读错了问题，我进行了少许编辑):

Without re-ordering (note I edit slightly as I think I misread the question):

int[] data = {1, 10, 25, 30, 4};
int last = 25;
var next = data.SkipWhile(i => i != last).Skip(1).First();

很明显，如果data是一组对象，则类似于:

Obviously, if data was a set of objects, something like:

var next = data.SkipWhile(obj => obj.Id != last).Skip(1).First();

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