如何检查当前时间是否在一段时间之间？ [英] How can I check if the current time is between in a time frame?

问题描述

我有一个用户可以配置为在非高峰时段运行的服务。他们有能力设置服务可以运行的时间。

例如：

用户A上午8点到下午5点，所以他们想安排应用程序在下午5:30到7:30之间运行。

用户B上午9点至下午6点，所以他们安排应用程序在上午6:30和晚上8:30之间运行。

$ b $关键是应用程序在不使用计算机的情况下使用它们。

给定当前时间的DateTime，启动的DateTime和停止时间的DateTime，如何检查当前是否在启动和停止之间。 p>

对我来说，棘手的部分是时间可以跨越午夜边界。

解决方案

如果 startTime 和 endTime 表示单个时间间隔（只会发生一次，而$ code> startTime 和 endTime 表示开始/停止的日期和时间），那么简单说说

  bool isTimeBetween = someTime> = startTime&& someTime< = endTime; 
  

如果这是一个重复的事件（每隔一段时间发生），您可以使用 TimeOfDay 属性。 （经常发生的情况是你必须考虑到午夜的开始/停止）

  static public bool IsTimeOfDayBetween（DateTime时间，
 TimeSpan startTime，TimeSpan endTime）
 {
 if（endTime == startTime）
 {
 return true; 
} 
 else if（endTime< startTime）
 {
 return time.TimeOfDay< = endTime || 
 time.TimeOfDay> = startTime; 
} 
 else 
 {
 return time.TimeOfDay> = startTime&&& 
 time.TimeOfDay< = endTime; 
} 
 
} 
  

（注意：此代码假定如果 start == end ，那么它覆盖所有的时间，你对另一个帖子发表了评论）

例如，检查是否在上午5点到晚上9点之间

  IsTimeOfDayBetween（someTime，new TimeSpan（5，0 ，0），新的TimeSpan（21,30,0））
  

如果 startTime 和 endTime 是 DateTime s，你可以说

  IsTimeOfDayBetween（someTime，startTime.TimeOfDay，endTime.TimeOfDay）
  

I have a service that user can configure to run during "off-peak" hours. They have the ability to set the time frame that the service can run.

For Example:

User A works 8am-5pm, so they want to schedule the app to run between 5:30pm and 7:30am.

User B works 9pm-6am, so they schedule the app to run between 6:30am and 8:30 pm.

The point is that the app uses their computer while they are not.

Given a DateTime of the current time, a DateTime of the start and a DateTime of the stop time, how can I check if current is between start and stop.

The tricky part for me is that the time can cross the midnight boundary.

解决方案

If startTime and endTime represent a single time interval (it will only happen once, and startTime and endTime represent the date and the time to start/stop), then it's as easy as saying

bool isTimeBetween = someTime >= startTime && someTime <= endTime;

If it's a recurring event (happens every day, during some interval), you can do comparisons using the TimeOfDay property. (The recurring case is the one where you have to consider a start/stop that crosses midnight)

static public bool IsTimeOfDayBetween(DateTime time, 
                                      TimeSpan startTime, TimeSpan endTime)
{
    if (endTime == startTime)
    {
        return true;   
    }
    else if (endTime < startTime)
    {
        return time.TimeOfDay <= endTime ||
            time.TimeOfDay >= startTime;
    }
    else
    {
        return time.TimeOfDay >= startTime &&
            time.TimeOfDay <= endTime;
    }

}

(Note: This code assumes that if start == end, then it covers all times. You made a comment to this effect on another post)

For example, to check if it's between 5 AM and 9:30 PM

IsTimeOfDayBetween(someTime, new TimeSpan(5, 0, 0), new TimeSpan(21, 30, 0))

If startTime and endTime are DateTimes, you could say

IsTimeOfDayBetween(someTime, startTime.TimeOfDay, endTime.TimeOfDay)

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