如何从数据库动态重新安排C＃中的Quartz作业调度程序？

我已经在我的C＃.Net网站中包含了Quartz.net库，可以根据某些条件自动发送电子邮件。 我已经使用RepeatForever（）开始了这项工作。 我从数据库中获取调度程序的设置。 现在当作业已经启动时，无论如何都要检查数据库中调度程序的设置是否已更改，所以我还应该在我的方法中更新它们，以便调度程序动态运行新设置？ 到目前为止，我已经这样做了：

public void StartJob() { var reminderSettings = GetReminderSettings(); //getting these settings from database var count = GetUnpaidInvoicesListCount(); var intervalBtwnReminders = 0; if (reminderSettings?.RemindersGap != null) { intervalBtwnReminders = (int)(reminderSettings.RemindersGap); } ISchedulerFactory schedFact = new StdSchedulerFactory(); IScheduler sched = schedFact.GetScheduler(); sched.Start(); // create job IJobDetail job = JobBuilder.Create() .WithIdentity("job1", "group1") .Build(); // create trigger ITrigger trigger = TriggerBuilder.Create() .WithIdentity("trigger1", "group1") .WithSimpleSchedule(x => { x.WithIntervalInMinutes(intervalBtwnReminders ).RepeatForever(); }) .Build(); sched.ScheduleJob(job, trigger); } 

Answer 1

我写了一套方法来使它更容易。 您无法使用新间隔编辑现有触发器，但可以使用新触发器替换现有触发器。 CreateTrigger方法基于旧的触发器创建新的触发器并传输TimesTriggered计数。

 /// 
 /// Create a new trigger based on a existing trigger. /// 
 /// the existing trigger /// indicates if the trigger should start immediately after schedule /// the interval for the new trigger /// Returns the new trigger public ITrigger CreateTrigger(ITrigger oldTrigger, bool startNow = false, TimeSpan? interval = null) { var builder = oldTrigger.GetTriggerBuilder(); if (startNow) builder = builder.StartNow(); if (interval.HasValue) builder = builder.WithSimpleSchedule(s => s .WithInterval(interval.Value) .RepeatForever()); var newTrigger = builder.Build(); var simpleTrigger = newTrigger as ISimpleTrigger; if(simpleTrigger != null) { var trigger = oldTrigger as ISimpleTrigger; if (trigger != null) simpleTrigger.TimesTriggered = trigger.TimesTriggered; } return newTrigger; } 

如何使用它

在此示例中，Scheduler已在运行。

 // get the trigger var trigger = Scheduler.GetTrigger(new TriggerKey("trigger1", "group1")); // get your settings and set the interval var reminderSettings = GetReminderSettings(); var intervalBtwnReminders = 0; if (reminderSettings?.RemindersGap != null) { intervalBtwnReminders = (int)(reminderSettings.RemindersGap); } // reschedule the job with a new trigger and start it immediately. // if you don't want that it starts now, pass 'false' for the 'startNow' parameter Scheduler.RescheduleJob(trigger.Key, CreateTrigger(trigger, true, TimeSpan.FromMinutes(intervalBtwnReminders)));