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c#c#-4.0timerwindows-services
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Reputation: 9416

how to set up a timer in a C# windows windows service

System.Timers.Timer scheduleTimer = new System.Timers.Timer();
DateTime dtPrevDate = new DateTime();

    public Service1()
    {
        InitializeComponent();

        scheduleTimer.Enabled = true;
        int timerInterval = //number of seconds to the next 7th day of either current or next month;

        scheduleTimer.Interval = timerInterval
        scheduleTimer.Elapsed += new ElapsedEventHandler(scheduleTimer_Elapsed);  
    }

    protected override void OnStart(string[] args)
    {
        this.scheduleTimer.Start();
        dtPrevDate = DateTime.Now.Date;
        Logger.CreateLog("Service started");
    }

In the sample code above in my Windows service, how can i get the number of seconds to the next 7th day of either current or next month irrespective of whether the service was stopped, restarted or the server was rebooted?.

Upvotes: 0

Views: 241

Answers (1)

Steven Liekens
Steven Liekens

Reputation: 14133

You can use this utility function to get the DateTime that corresponds to the next nth day of either this or the following month.

private DateTime GetNthDay(int n)
{
    DateTime today  = DateTime.Today;
    DateTime nthDay = new DateTime(today.Year, today.Month, n);

    if ( nthDay <= today )
    {
        nthDay = nthDay.AddMonths(1);
    }

    return nthDay;
}

Using that, the rest is just basic math.

DateTime dtPrevDate    = DateTime.Now;
DateTime dtNextDate    = GetNthDay(7);
Double secondsTo7thDay = (dtNextDate - dtPrevDate).TotalSeconds;

Upvotes: 1

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