.OrderBy(DayOfWeek)将星期日视为一周的结束 [英] .OrderBy(DayOfWeek) to treat Sunday as the end of the week

问题描述

我正在通过其 System.DayOfWeek 属性订购许多对象.

I'm ordering a number of objects by their System.DayOfWeek property.

DayOfWeek 将星期日视为该广告的开始周，而我希望订购它，以便它出现在 end 处.这只是一个枚举，所以我无法对其进行修改.但是，我读到我可以创建自定义文化，但认为这可能是过分的.

DayOfWeek treats Sunday as the start of the week, whereas I would like it to be ordered so it appears at the end. It's just an enum, so I can't modify it. However I've read that I may be able to create a custom culture but think this is probably overkill.

List<TimeBand> orderedTimeBands = timeBands.OrderBy(x => x.DayName).ToList()

所以DayName是DayOfWeek，我希望从星期一->星期日开始订购orderedTimeBands.

So DayName is a DayOfWeek, i want orderedTimeBands to be ordered from Monday -> Sunday.

有什么想法吗?

推荐答案

最简单的方法是:

var orderedTimeBands = timeBands.OrderBy(x => ((int) x.DayOfWeek + 6) % 7)
                                .ToList()

所以我们有:

Name        Original value      Value after arithmetic
Sunday       0                  6
Monday       1                  0
Tuesday      2                  1
Wednesday    3                  2
Thursday     4                  3
Friday       5                  4
Saturday     6                  5

...我想这就是你想要的.

... which is what you want, I think.

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