sourceit/Recurrency.net
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Recurrency.net v0.6 WHAT IS RECURRENCY.NET Recurrency.net (r.n) is a recurring date library for .net. E.g. You can use r.n to calcuate the 1st Wednesday in every month till Jan 1st 2020. EXAMPLE USAGE To calculate every weekday from DateTime(2011, 4, 1) for 5 occurrances DailyRecurrency daily = new DailyRecurrency(new DateTime(2011, 4, 1), 5, DailyType.Weekdays); var dateFirst = daily.GetFirstDate(); // first date var dateSecond = daily.GetNextDate(dateFirst); ... GetNextDate() will return null once past the end date or var info = new RecurrencyInfo { StartDate = new DateTime(2011,4,1), Occurrences = 5, DailyType = DailyType.Weekdays, Type = RecurrencyType.Daily }; STORING TO DATABASE The recurrency pattern can be stored in a string field of length 50. To get a pattern, use myRecurrency.GetPattern() or myInfo.GetPattern(); To create a recurrency object from a pattern use var info = new RecurrencyInfo(myPattern); var recurrency = info.GetRecurrency(); RECURRENCY PATTERNS BASE PATTERN Type 1 char D | W | M | Y Start date 8 chars yyyymmdd End date 8 chars yyyymmdd, 00000000 if not specified, inclusive Num recurrences 4 chars 0000 if not specified Interval 4 chars 0000 Type specific info x chars Notes: Case insensitive Spaces are removed before processing DAILY SPECIFIC PATTERN D... Daily Type 1 char X (Every x days) or W (weekdays) E.g D 20111213 00000000 0012 0001 X D Daily 20111213 25 Dec 2011 00000000 No specified end date 0012 12 occurrences 0001 1 day apart X Every x days will calculate the 12 days of xmas for 2011 D 20110201 20110228 0000 0001 W D Daily 20110201 Feb 1st 2011 20110228 Feb 28th 2011 0000 No specifed num occurrences 0001 Not used, always treated as one for weekdays (for now) W Weekdays will calculate every weekday in Feb 2011. WEEKLY SPECIFIC PATTERN W... Use Monday Y/N Use Tuesday Y/N Use Wednesday Y/N Use Thursday Y/N Use Friday Y/N Use Saturday Y/N Use Sunday Y/N Note: Weeks start on mondays so that weekends stay together E.g. W 20110201 20110228 0000 0001 YNYNYNN W Weekly 20110201 Feb 1st 2011 20110228 Feb 28th 2011 0000 No specifed num occurrences 0001 Every week YNYNYNN Mon, Wed, Fri MONTHLY SPECIFIC PATTERN M... Monthly Type 1 char W or M 00 Day number (day of month 1 based or day of week 0 based) 0 Weekday index 0 = 1st X, 3 = 4th X, 4 = last X E.g. M 20110201 20111130 0000 0001 M 14 0 M Monthly 20110201 Feb 1st 2011 20110228 Nov 30th 2011 0000 No specifed num occurrences 0001 Every month M Day of month 14 14th 0 Not used calculates the 14th of every month from Feb - Nov 2011 M 20110201 00000000 0006 0002 W 00 2 M Monthly 20110201 Feb 1st 2011 00000000 No specifed num occurrences 0006 6 occurrences 0002 Every 2nd month W Week day 00 Monday 2 3rd calculates the 3rd Monday of every 2nd month from Feb 2011 for 6 occurrences YEARLY SPECIFIC PATTERN Y... Monthly Type 1 char W or M 00 Day number (day of month 1 based or day of week 0 based) 0 Weekday index 0 = 1st X, 3 = 4th X, 4 = last X 00 Month of Year 1 = Jan E.g. Y 20110201 20150201 0000 0001 M 14 0 03 Y Yearly 20110201 Feb 1st 2011 20150201 Feb 1st 2015 0000 No specifed num occurrences 0001 Every year M Day of month 14 14th 0 Not used 03 March calculates March 14th of every year from Feb 2011 to Feb 2015 Y 20110201 00000000 0006 0002 W 00 2 04 Y Yearly 20110201 Feb 1st 2011 00000000 No specifed num occurrences 0006 6 occurrences 0002 Every 2nd year W Week day 00 Monday 2 3rd 04 April calculates the 3rd Monday in April of every 2nd year from Feb 2011 for 6 occurrences
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Recurring date library for .net
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