DotNet Roundoff日期时间持续15分钟

Question

是否有功能将日期时间整理到最后一个季度？

例...

08:03:00 becomes 08:00:00

08:14:00 becomes 08:00:00

08:15:00 stays   08:15:00

08:16:00 becomes 08:15:00

08:29:00 becomes 08:15:00

08:45:00 stays   08:45:00 

08:55:00 becomes 08:45:00

09:01:00 becomes 09:00:00

我写了下面的函数,但它返回下一季 ...

private DateTime RoundUpToPreviousQuarter(DateTime date, TimeSpan d)
{
      return new DateTime(((date.Ticks + d.Ticks - 1) / d.Ticks) * d.Ticks);
}

// call the method
this.RoundUp(time, TimeSpan.FromMinutes(15));

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Answer 1

将模数15应用于datetime Minute属性,并从同一属性中减去该值

DateTime dt = new DateTime(2013,5,28, 15, 59,0);
dt = dt.AddMinutes(-(dt.Minute % 15));

在这个例子中,我创建了一个零秒的日期时间.如果你还需要删除秒

DateTime dt = new DateTime(2013,5,28, 15, 59,45);
dt = dt.AddMinutes(-(dt.Minute % 15)).AddSeconds(-dt.Second);