Windows服务 - 如何在几个特定时间运行任务？

Question

我有一个运行的Windows服务.在其中,任务目前每天晚上7点运行.运行最好的方法是在上午9点45分,上午11点45分,下午2点,下午3点45分,下午5点和下午5点45分.

我知道我可以有计划任务来运行该功能,但我想知道如何在我的Windows服务中执行此操作.目前的代码如下:

private Timer _timer;
private DateTime _lastRun = DateTime.Now;
private static readonly log4net.ILog log = log4net.LogManager.GetLogger
(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

protected override void OnStart(string[] args)
{
    // SmartImportService.WebService.WebServiceSoapClient test = new WebService.WebServiceSoapClient();
    // test.Import();
     log.Info("Info - Service Started");
    _timer = new Timer(10 * 60 * 1000); // every 10 minutes??
    _timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
    _timer.Start();
}

private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
    log.Info("Info - Check time");
    DateTime startAt = DateTime.Today.AddHours(19);
    if (_lastRun < startAt && DateTime.Now >= startAt)
    {
        // stop the timer 
        _timer.Stop();               

        try
        {
           log.Info("Info - Import");
           SmartImportService.WebService.WebServiceSoapClient test = new WebService.WebServiceSoapClient();
           test.Import();
        }
        catch (Exception ex) {
           log.Error("This is my error - ", ex);
        }
        _lastRun = DateTime.Now;
        _timer.Start();
   }
}

Answer 1

考虑使用Quartz.net和CronTrigger.

Answer 2

如果您不想使用cron或quartz,请编写一个函数来查找now和next run之间的时间间隔并相应地重置计时器,在service start和timeelapsed事件上调用此函数.你可能会做这样的事情(代码没有经过测试)

   System.Timers.Timer _timer;
    List<TimeSpan> timeToRun = new List<TimeSpan>();
    public void OnStart(string[] args)
    {

        string timeToRunStr = "20:45;20:46;20:47;20:48;20:49";
        var timeStrArray = timeToRunStr.Split(';');
        CultureInfo provider = CultureInfo.InvariantCulture;

        foreach (var strTime in timeStrArray)
        {
            timeToRun.Add(TimeSpan.ParseExact(strTime, "g", provider));
        }
        _timer = new System.Timers.Timer(60*100*1000);
        _timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
        ResetTimer();
    }


    void ResetTimer()
    {
        TimeSpan currentTime = DateTime.Now.TimeOfDay;
        TimeSpan? nextRunTime = null;
        foreach (TimeSpan runTime in timeToRun)
        {

            if (currentTime < runTime)
            {
                nextRunTime = runTime;
                break;
            }
        }
        if (!nextRunTime.HasValue)
        {
            nextRunTime = timeToRun[0].Add(new TimeSpan(24, 0, 0));
        }
        _timer.Interval = (nextRunTime.Value - currentTime).TotalMilliseconds;
        _timer.Enabled = true;

    }

    private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
    {
        _timer.Enabled = false;
        Console.WriteLine("Hello at " + DateTime.Now.ToString());
        ResetTimer();
    }