C＃控制循环中的时间比较 [英] C# controlling the time comparison in loop

问题描述

你好，



我给我的代码打了一小部分。我的问题是当我运行这段代码时，我总是得到假。我该如何解决这个问题？

Hello,

I give my code snipple down part.My problem is when i run this code i get false all time. How can i fix this?

While(!isStop)
{
	var isReportOnly = false;
	var isInReportPeriod = false;

	DateTime dtStart = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 22, 0, 0);
	DateTime dtStop = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 06, 0, 0);
	if (DateTime.Now > dtStart && DateTime.Now < dtStop)
	{
		isInReportPeriod = true;
		log.Add( DateTime.Now.ToString() + "=True\n");
	}
	else
	{
		isInReportPeriod = false;
		log.Add(DateTime.Now.ToString() + "=False\n");
	}
}

我的尝试：



我如何解决循环中的时间问题

What I have tried:

How can i fix the problem for time comprison in the loop

推荐答案

嗯。

开始时间是22:00，停止时间是06:00。

要记录TRUE，您需要当天时间在22:00之后和当天06:00之前...



可能你的开始和停止时间错了吗？



但不要这样做：永远不会多次读取时间，它可能会在白天，（或更糟的月份或年份）变化时引起问题。

Um.
Start is 22:00, stop is 06:00.
To log TRUE, you need the current time to be both after 22:00 and before 06:00 on the same day...

Possibly you got the start and stop times wrong?

But don't do it like that anyway: never read the time more than once, it can cause problems when the day, (or worse month or year) changes.

DateTime now = DatetIme.Now;
DateTime start = now.Date.AddHours(6);
DateTime stop = now.Date.AddHours(22);
if (now > start && now < stop)
   {
   ...

这篇关于C＃控制循环中的时间比较的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！