Calender weeks not correct at year start/end - Scheduling and Gantt Components

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Calender weeks not correct at year start/end (Read 8456 times)

Grisu YaBB Newbies Offline WPF is cool Posts: 5 Location: Germany Joined: Nov 30^th, 2011	Calender weeks not correct at year start/end Nov 30^th, 2011 at 10:30am	Print Post
	The scheduler in Monthrange view show the wrong calender weeks at the end of the year. First I use a german W7 and I use the following Culture settings: System.Globalization.CalendarWeekRule = FirstFourDayWeek DateTimeFormatInfo.FirstDayOfWeek = Monday MindFusion.Scheduling.Wpf.dll 3.1.0.0 To see the problem use the DualView sample and ONLY change the MonthSetting.WeekHeaderStyle = "Left" and the MonthRangeSettings ScrollInterval = "1". Step forward to the point where you see December 2012 and Januar 2013 at the left side in the calender. The last day of december is shown as calender week 53 but 2012 has only 52 weeks. The first days in Januar are shown also with week 53 and the second week has the week number 2. So there is no week number 1, but a week 53. December 2011 to Januar 2012 is ok, 2011 has 52 weeks. 2012 to 2013 not ok, 2013 to 2014 not ok,2014 to 2015 not ok, December 2015 to Januar 2016 is ok, because 2015 has 53 weeks Thanks Udo


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Meppy God Member Offline MindFusion support Posts: 1783 Joined: Jul 20^th, 2005	Re: Calender weeks not correct at year start/end Reply #1 - Nov 30^th, 2011 at 11:25am	Print Post
	We are relying on the result of the System.Globalization.Calendar.GetWeekOfYear(...) method for the first day of the week (which in the first case is Dec 31, 2012). This method returns 53 for this date and that's what we display in the header. If you have a suggestions on how to solve this, please let me know. Regards, Meppy


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Grisu YaBB Newbies Offline WPF is cool Posts: 5 Location: Germany Joined: Nov 30^th, 2011	Re: Calender weeks not correct at year start/end Reply #2 - Nov 30^th, 2011 at 11:39am	Print Post
	Hi Meppy, there are some post for a known problem with the function GetWeekOfYear in .Net. Please see e.g. : http://blogs.msdn.com/b/shawnste/archive/2006/01/24/iso-8601-week-of-year-format... I use instead the following code and it worked, too: CultureInfo currentCulture = CultureInfo.CurrentCulture; Calendar calendar = currentCulture.Calendar; int calendarWeek = calendar.GetWeekOfYear(date, currentCulture.DateTimeFormat.CalendarWeekRule, currentCulture.DateTimeFormat.FirstDayOfWeek); if (calendarWeek > 52) { date = date.AddDays(7); int testCalendarWeek = calendar.GetWeekOfYear(date, currentCulture.DateTimeFormat.CalendarWeekRule, currentCulture.DateTimeFormat.FirstDayOfWeek); if (testCalendarWeek == 2) calendarWeek = 1; } Regards, Udo


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Meppy God Member Offline MindFusion support Posts: 1783 Joined: Jul 20^th, 2005	Re: Calender weeks not correct at year start/end Reply #3 - Nov 30^th, 2011 at 3:45pm	Print Post
	We have added a new event to the control - Calendar.QueryHeaderText, which is currently only raised for the week headers of the SingleMonth and MonthRange views. You can handle this event and perform the correct calculations of the week number: Code void calendar_QueryHeaderText(object sender, QueryHeaderTextEventArgs e) { // Perform the calculations here and set the appropriate text to e.Text e.Text = calendarWeek.ToString(); } We opted not to integrate the workaround directly into the control for several reasons, particularly because the bug will eventually be resolved in the future. The new version of the component can be downloaded here. Let me know if this helps. Regards, Meppy


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Grisu YaBB Newbies Offline WPF is cool Posts: 5 Location: Germany Joined: Nov 30^th, 2011	Re: Calender weeks not correct at year start/end Reply #4 - Nov 30^th, 2011 at 5:53pm	Print Post
	Hi Meppy, this works thanks. But I am wondering how often this new Event is fired. This new Event will from now on be part of all builds you deliver? So if I maybe find an other problem/bug and you send me a new version this new event will be included? Thank, Regards Udo


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Meppy God Member Offline MindFusion support Posts: 1783 Joined: Jul 20^th, 2005	Re: Calender weeks not correct at year start/end Reply #5 - Dec 1^st, 2011 at 6:57am	Print Post
	Hi Udo, The new event is raised once for each header cell only when the view is initially rendered or in response to a change in the settings (such as changing the displayed month) which causes the view to be refreshed. Also, the event will be part of all future builds, including official releases. Regards, Meppy


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