得到两个工作日之间的天差 [英] Get difference in days between two weekdays

问题描述

这听起来很容易，但我不明白这一点。

This sounds very easy, but i don't get the point.

那么，什么是获得之间的天数最简单的方法两个 DayOfWeeks 时，第一个是起点？如果下一个工作日较早，它应该被认为是在未来的周

So what's the easiest way to get number of days between two DayOfWeeks when the first one is the starting point? If the next weekday is earlier, it should considered to be in the next week.

在一周中的某天枚举与周日（0）和结束周六（6）。

 1. Monday    = 1
 2. Thursday  = 4

Result: 4 - 1 = 3

 1. Thursday  = 4
 2. Monday    = 1
// obviously a Math.Abs is helpful
Result: Math.Abs(1 - 4) = 3

但这个结果是错误的，因为有周四和周一（下周）。

But this result is wrong because there are 4 days between Thursday and Monday(next week).

推荐答案

添加7，那么mod7：

Add 7, then mod 7:

(7 + (1 - 4)) % 7

例如：

var weekDay1  = DayOfWeek.Thursday;
var weeekDay2 = DayOfWeek.Monday;
var daysDiff  = (7 + (weeekDay2 - weekDay1)) % 7;

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