How to Create Indefinite Duration for a Task in Windows 2003 Task Scheduler

问题

I'm trying to create tasks with an indefinite duration. On Windows Server 2008, if I don't specify the duration, then the duration is assumed infinite. However, on Windows Server 2003 a duration must be specified (and be equal or greater than the interval). Currently, I am just setting the task to have a duration of a year if it is meant to repeat a long time.

Is there a way to specify an indefinite duration on Windows Server 2003?

if (m_TimeInterval.m_Expire.Year < 2099) //xp and win7 max year is 2099
    tTrigger.Repetition.Duration = m_TimeInterval.getDuration();
else if (!newVer) tTrigger.Repetition.Duration = m_TimeInterval.getInterval().Add(TimeSpan.FromDays(365));
tTrigger.Repetition.Interval = m_TimeInterval.getInterval();
tTrigger.Repetition.StopAtDurationEnd = true;

Notes:

• I am using the Task Scheduler API to add these task definitions.
• Interval and Duration are set by use of TimeSpans.
• newVer is false since I am working with Task Scheduler 1.1 and not 1.2 or higher
• tTrigger is of type TimeTrigger

回答1:

I ended up using 1-1-2099 as 'indefinite'

回答2:

You also can use TimeSpan.Zero which makes the task infinite.

Heres a short code snippet to demonstrate how to use it on a Trigger :

Trigger triggerTask = Trigger.CreateTrigger(TaskTriggerType.Time);
triggerTask.StartBoundary = DateTime.Now.AddMinutes(3);
triggerTask.SetRepetition(new TimeSpan(0, 3, 0, 0, 0), TimeSpan.Zero);

回答3:

Can you use Duration.Forever.TimeSpan?

来源：https://stackoverflow.com/questions/10742880/how-to-create-indefinite-duration-for-a-task-in-windows-2003-task-scheduler