.net get Days of week and Sort by Start day

Question

I am getting Abbreviated Day Names by culture an insert into a Class model:

        var daysNames = new CultureInfo(culture).DateTimeFormat
            .AbbreviatedDayNames
            .Select((item) => new CalendarDaysItem(item.ToUppercaseFirst()))
            .ToList();

But i need Sort the List with a specific Week Day, i Try this sample:

        var firstDayOfWeek = new CultureInfo(culture).DateTimeFormat.FirstDayOfWeek;

        var daysOfWeek = Enum.GetValues(typeof(DayOfWeek))
            .Cast<DayOfWeek>()
            .OrderBy(x => (x - firstDayOfWeek + 7) % 7);

        var daysOfWeekOrdered = daysOfWeek.OrderBy(x => (x - firstDayOfWeek + 7) % 7);

But the culture is EN-US and i need to change by parameter

Can you add sample input and output data? I don't understand `Sort the List with a specific Week Day` — Backs, Jul 25 '18 at 10:28
I don't understand what you are asking, you current implementation sorts the days using the day of the week of the culture you supplied. Is this not what you want? — TheGeneral, Jul 25 '18 at 10:44

score 1 · Answer 1 · answered Jul 25 '18 at 11:39

I think this might solve your issue. Please try with the below code:

var dateTimes = timeBands.OrderBy(x => ((int) x.DayOfWeek + 6) % 7) .ToList()

For more info you can refer this : .OrderBy(DayOfWeek) to treat Sunday as the end of the week

score 1 · Answer 2 · answered Aug 09 '18 at 07:55

            Thread.CurrentThread.CurrentCulture = new CultureInfo("pt-PT");
            DayOfWeek firstDayOfWeek = DayOfWeek.Monday;
            var daysOfWeek = Enum.GetValues(typeof(DayOfWeek))
               .Cast<DayOfWeek>()
               .OrderBy(x => (x - firstDayOfWeek + 7) % 7)
               .Select(x => DateTimeFormatInfo.CurrentInfo.GetAbbreviatedDayName(x))
               .ToList();

.net get Days of week and Sort by Start day

2 Answers2