Return index value datetime.now.dayofweek but how?

Question

is there any function of datetime return dayofweekindex? such as:
int Todaywhat_is_Index= = DateTime.Now.IndexOfDayofThisWeek;
if Today is friday, it must be return 5
ifToday is Saturday, it must be return 6
ifToday is Sunday, it must be return 0

If you want it faster : http://stackoverflow.com/a/22278311/3315914 — rpax, Mar 10 '14 at 17:19

H H · Answer 1 · 2012-07-19T09:03:04.770

17

This little one-liner works independent of locale, with always Friday == 5

int x = (int)System.Globalization.CultureInfo
        .InvariantCulture.Calendar.GetDayOfWeek(DateTime.Now);

edited Jul 19 '12 at 09:03

answered Feb 27 '09 at 14:51

H H

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score 0 · Accepted Answer · answered Feb 27 '09 at 14:37

0

Yes, check DateTime.DayOfWeek.

Please note this depends on the regional settings (here in Europe Monday is the first day of the week).

answered Feb 27 '09 at 14:37

Gerrie Schenck

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Be warned: this value varies by culture. Depending on where you are day 0 may be either Sunday or Monday. – Joel Coehoorn Feb 27 '09 at 14:38
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Don't forget that you need to cast it back to an int to get it as a number. – Powerlord Feb 27 '09 at 14:39
Use DateTimeFormatInfo.InvariantInfo.DayNames to avoid culture – Greg Feb 27 '09 at 14:56
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@GerrieSchenck I know your comment was made some years ago so perhaps things have changed but the current doc states: If cast to an integer, its value ranges from zero (which indicates DayOfWeek.Sunday) to six (which indicates DayOfWeek.Saturday). No mention of any regional/culture variances. – Wayne Phipps Feb 10 '13 at 13:12

score -1 · Answer 3 · edited May 07 '13 at 08:07

-1

Try this:

 int dayOfWeek;
 dayOfWeek = (int)System.DateTime.Now.DayOfWeek - (int)System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek + 1

edited May 07 '13 at 08:07

Storm

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answered May 07 '13 at 07:48

Ziv Bar-Lev

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Return index value datetime.now.dayofweek but how?

3 Answers3