我想计算两个日期之间的差异?

问题描述

我想计算两个日期之间的差额，但所有月份必须为30天.

所以2月28日和29日都没关系.
整月30天.

我计算出例如:

12.04.2010
12.04.2007 3年0个月0天

当然，您使用datetimepicker输入的日期可能会有所不同.

I want to calculate the difference between two dates, but all months must be 30 days.

So February 28th & 29th doesn''t matter.
All months 30 day.

I calculate lıke that for example:

12.04.2010
12.04.2007 3 year 0 month 0 day

Of course these dates can be different you enter with datetimepicker.

推荐答案

DateTime now = DateTime.Now;
DateTime yesterday = DateTime.Now.AddDays(-1);

int diff = now.Subtract(yesterday).Days;
Console.WriteLine(diff);

private void CalculateDifference()
{
    int years, months, days;

    years = (dateTimePicker2.Value.Year - dateTimePicker1.Value.Year);
    months = (dateTimePicker2.Value.Month - dateTimePicker1.Value.Month);
    days = (dateTimePicker2.Value.Day - dateTimePicker1.Value.Day);

    if (months < 0)
    {
        years--;
        months = months + 12;
    }

    if (days < 0)
    {
        months--;
        days = days + 30;
    }

    textBox1.Text = years + " Years, " + months + " Months, " + days + " Days";
}

对于以下输入，这将给出以下结果

第一次约会	第二次约会	日期差异
10.07.2009	07.07.2010	0年9个月0天
10.07.2009	10.08.2010	1年0个月， 1天
12.16.2009	10.08.2010	0年，9个月，22天
06.08.2009	07.07.2010	0年，0个月，29天
02.07.2010	03.04.2010	0年0个月27天*

*最后一个例子实际上是不准确的，因为二月没有30天.实际上，3月4日和2月7日之间的差额是非-年的25天和a年的26天，而不是27天.但这就是您要的.

This gives the following results for the following inputs

First Date	Second Date	Date Difference
10.07.2009	07.07.2010	0 Years, 9 Months, 0 Days
10.07.2009	10.08.2010	1 Years, 0 Months, 1 Days
12.16.2009	10.08.2010	0 Years, 9 Months, 22 Days
06.08.2009	07.07.2010	0 Years, 0 Months, 29 Days
02.07.2010	03.04.2010	0 Years, 0 Months, 27 Days*

*The last example is actually inaccurate, though, because February does not have 30 days. In actuality, the difference between March 4th and February 7th is 25 days on a non-leap year and 26 on a leap year, not 27. But that''s what you asked for.

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