c# - 生成每周日期

Question

我确信这已经完成了，所以我正在寻找一个有效的解决方案而不是自己的自定义解决方案。

给定 2 个日期，我试图生成准确的每周日期(用于创建每周订单)。

编辑:我需要使用 .NET 标准库来执行此操作。

Example below,

Given 28/02/2012 and 6/03/2012.

so, the weekly dates generated are
- Week From(Start Monday):   Week To(End Sunday):
- 27/02/2012               - 04/03/2012
- 05/03/2012               - 11/03/2012

Another example (1 month)

Given 01/02/2012 and 29/02/2012
so, the weekly dates generated are
- Week From(Start Monday):   Week To(End Sunday):
- 30/01/2012               - 05/02/2012
- 06/02/2012               - 12/02/2012
- 13/02/2012               - 19/02/2012
- 20/02/2012               - 26/02/2012
- 27/02/2012               - 04/03/2012

我在 C# 中执行此操作。这是以前做过的吗？介意分享解决方案吗？

干杯

Answer 1

这是一个使用 Noda Time 的解决方案.诚然，它需要 <=我现在正在实现的运算符 - 但这不会花很长时间:)

using System;
using NodaTime;

class Test
{
    static void Main()
    {
        ShowDates(new LocalDate(2012, 2, 28), new LocalDate(2012, 3, 6));
        ShowDates(new LocalDate(2012, 2, 1), new LocalDate(2012, 2, 29));
    }

    static void ShowDates(LocalDate start, LocalDate end)
    {
        // Previous is always strict - increment start so that
        // it *can* be the first day, then find the previous
        // Monday
        var current = start.PlusDays(1).Previous(IsoDayOfWeek.Monday);
        while (current <= end)
        {
            Console.WriteLine("{0} - {1}", current,
                              current.Next(IsoDayOfWeek.Sunday));
            current = current.PlusWeeks(1);
        }
    }
}

显然可以在正常情况下执行此操作 DateTime同样，但没有真正表示“只是一个日期”，这使得代码不太清晰 - 你需要实现 Previous自己。

编辑:例如，在这种情况下您可以使用:

using System;

class Test
{
    static void Main()
    {
        ShowDates(new DateTime(2012, 2, 28), new DateTime(2012, 3, 6));
        ShowDates(new DateTime(2012, 2, 1), new DateTime(2012, 2, 29));
    }

    static void ShowDates(DateTime start, DateTime end)
    {
        // In DateTime, 0=Sunday
        var daysToSubtract = ((int) start.DayOfWeek + 6) % 7;
        var current = start.AddDays(-daysToSubtract);        

        while (current <= end)
        {
            Console.WriteLine("{0} - {1}", current, current.AddDays(6));
            current = current.AddDays(7);
        }
    }
}