Question

我需要运行一个job / scheduler，它应该只更新它在指定时间范围内的数据库中的记录。就我而言，时间范围是从凌晨3点30分到次日凌晨1点30分。因此，在此时间范围内，作业需要更新记录。为了获得这个时间间隔，我使用了TimeOfDay（）函数，但是我的逻辑失败了，如果当前时间是6.00 Am，则bcoz，然后“currentTime＆lt; = todaysJob.ENDTIME.Value.TimeOfDay”返回false。我使用以下代码检查

     var currentTime = DateTime.Now.TimeOfDay;
     if (currentTime > todaysJob.STARTTIME.Value.TimeOfDay && 
          currentTime <= todaysJob.ENDTIME.Value.TimeOfDay)
            {
                // Do logic
            }

Answer 1

        bool endTomorrow = true;

        DateTime taskDate = new DateTime(2012, 08, 31);

        TimeSpan Start = new TimeSpan(03, 30, 00);
        TimeSpan End = new TimeSpan(01, 30, 00);

        DateTime currentTime = DateTime.Now;

        bool flag = false;

        if (currentTime.TimeOfDay >= Start)
        {
            if (endTomorrow)
            {
                flag = currentTime.Date <= taskDate || (currentTime.Date == taskDate.AddDays(1) && currentTime.TimeOfDay < End);
            }
            else
            {
                flag = currentTime.TimeOfDay < End;
            }
        }

        if (flag)
        {
            //do the task
        }

修改

所以我补充道：

布尔标志，确定任务是否应该在第二天结束

说明任务日期的日期时间变量（taskDate）

Start和End等于todaysJob.STARTTIME和todaysJob.ENDTIME，所以你可以按原样从DB中取出它们。

修改

如果你能得到这样的工作：

public class Job { public TimeSpan STARTTIME; public TimeSpan ENDTIME; public DayOfWeek taskDayOfWeek; public bool IsEndingTommorow; public bool IsTomorrow(DayOfWeek d) { if (d == DayOfWeek.Sunday) return taskDayOfWeek == DayOfWeek.Saturday; else return d <= taskDayOfWeek; } }

然后你可以

DateTime currentTime = DateTime.Now; bool flag = false; if (currentTime.TimeOfDay >= todaysJob.STARTTIME) { if (todaysJob.IsEndingTommorow) { flag = currentTime.DayOfWeek == todaysJob.taskDayOfWeek || (todaysJob.IsTomorrow(currentTime.DayOfWeek) && currentTime.TimeOfDay < todaysJob.ENDTIME); } else { flag = currentTime.TimeOfDay < todaysJob.ENDTIME; } } if (flag) { //do the task }

修改

我已经编辑了我的代码了一次：添加了一个避免DayOfWeek枚举问题的方法

Answer 2

您可以使用Time Period Library for .NET确定片刻是否属于多个时间段：

// ----------------------------------------------------------------------
public bool CheckDateBetweenDatesSample()
{
  DateTime now = DateTime.Now;
  TimePeriodCollection periods = new TimePeriodCollection();
  // read periods (Start/end) from database
  // ...
  periods.Add( new TimeRange( start, end ) );
  return periods.HasIntersectionPeriods( now );
} // CheckDateBetweenDatesSample

Answer 3

试试这个，它为我工作。如果我错了，请纠正我。

TimeSpan timeOfDay = DateTime.Now.TimeOfDay;
TimeSpan startTimeToD = startTime.TimeOfDay;
TimeSpan endTimeToD = endTime.TimeOfDay;

if (timeOfDay > startTimeToD || timeOfDay < endTimeToD )
{
      Console.WriteLine("Hello World");
}

timeOfDay = new TimeSpan(2, 30, 00); //testcase
if (timeOfDay > startTimeToD || timeOfDay < endTimeToD )
{
     //will never execute.
}

Answer 4

您不能使用TimeOfDay属性，因为它是中点（午夜）的绝对距离（经过时间）。使用DateTime进行比较有什么问题？比较运算符（＆lt;＆gt;＆lt; =＆gt; =）与DateTime数据类型完美匹配。

例如：

DateTime currentTime = DateTime.Now;
DateTime startTime = DateTime.AddMinutes(-50D); //in your case this would be a DT todaysJob.STARTTIME.Value
DateTime endTime = DateTime.AddMinutes(50);// in your case this would be a DT todaysJob.ENDTIME.Value

if(currentTime > startTime && currentTime <= endTime)
{
  Console.Write("Works Fine"); //your logic
}

确定落在时间范围之间的时间戳

4 个答案: