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Find the count of a weekday between two dates without iterating/looping

, 25 Dec 2011
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Find the count of a weekday between two dates without iterating/looping

When you want number of Thursdays or any other week day between two dates, there is no direct function in .NET. To fill the gap, I have written the following function that gives the count of a weekday between two given dates. This function is constructed without using iteration/loop statements.

public static int  findWeekCount(DateTime startDate, DateTime toDate, DayOfWeek Week)
    int _daysBetweenDates = (toDate - startDate).Days;  // days between start date and end date
    int _adjustingDays = (7 + (int)Week - (int)startDate.DayOfWeek) % 7; // days between week of start date and searching week
    int _oddDays = _daysBetweenDates % 7; // remainder of total days after dividing 7

    int _completeWeekTurns = (_daysBetweenDates) / 7;
    int _addTurns = _oddDays >= _adjustingDays  ? 1 : 0;
    return _completeWeekTurns + _addTurns;


DateTime sDate = new DateTime(2011, 09, 1);
DateTime eDate = new DateTime(2011, 11, 30);
DayOfWeek fWeek = DayOfWeek.Monday;
int totCount = findWeekCount(sDate, eDate, fWeek);
MessageBox.Show(totCount.ToString()); //Result : 13 (Mondays)

Hope this is useful. Any alternative is highly appreciated.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Ravi LVS

India India
No Biography provided

Comments and Discussions

QuestionThanks for your help, I like your article very much. PinmemberMember 1103349424-Aug-14 21:55 
QuestionHow get the list of sundays between 2 specified dates in Pinmembersushant.khot3126-Aug-12 11:35 
QuestionIn health-care ruling, precedent trumped politics PinmemberAimeili11-Nov-11 15:57 

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