Question

I’m making a page to allow lecture create consultation slot, the way I make is populate button control in loop for 5 times(5 working days). I need to disabled the button got class in timetable and identify the button with button content then store into database. when lecturer click the button it pop up with date of column(day) + time slot.

Data for verify and disable button from table of timetable 
    start_time -> 2011-11-08 08:00:00
    end_time -> 2011-11-08 10:00:00

Then I plan to use end_time – start_time = 2 hour, if 2 hour then 08:00, 08:30, 09:00, 09:30 4 button from start_time will be disable. I create the button with

        string[] timeslot = {"08:00 AM", "08:30 AM", "09:00 AM", "09:30 AM", "10:00 AM", "10:30 AM", "11:00 AM", "11:30 AM", "12:00 PM", "12:30 PM", "01:00 PM", "01:30 PM", "02:00 PM", "02:30 PM", "03:00 PM", "03:30 PM", "04:00 PM", "04:30 PM", "05:00 PM", "05:30 PM"};
        for (int i = 0; i < 20; i++)
        {
            Button btnMonday = new Button
                                   {
                                       Height = 38,
                                       Width = 256,
                                       Content = timeslot[i],
                                       Background = new SolidColorBrush(Color.FromArgb(0xFF, 0xB1, 0xB1, 0xB1))
                                   };
            // Sets dependency properties
            btnMonday.SetValue(Grid.ColumnProperty, 0);
            btnMonday.SetValue(Grid.RowProperty, i);
            // Adds the dynamically created control to the canvas
            LayoutRoot.Children.Add(btnMonday);
       }

I created the button for Monday column, but I can’t assume Monday is gettime.now(), may I know how could I get the date for day of current week ?

Answer 1

Since DayOfWeek is an enum, it can be casted to an int.

public enum DayOfWeek
{
    Sunday = 0,
    Monday = 1,
    Tuesday = 2,
    Wednesday = 3,
    Thursday = 4,
    Friday = 5,
    Saturday = 6,
}

Then you can take that number of days from DateTime.Today

public static DateTime GetLastSunday()
{
    DateTime today = DateTime.Today;
    return today.AddDays(-((int)today.DayOfWeek));
}

You could then Add the day of the week back again that you want

public static DateTime GetDayOfThisWeek(DayOfWeek dayOfWeek)
{
    DateTime today = DateTime.Today;
    DateTime lastSunday = today.AddDays(-((int)today.DayOfWeek));
    return lastSunday.AddDays((int)dayOfWeek);
}

Update:

As for getting 30 minute chunks:

public IEnumerable<DateTime> GetHalfAnHourChunks(DateTime startFrom, DateTime until)
{
    while(startFrom < until)
    {
        yield return startFrom;
        startFrom = startFrom.AddMinutes(30);
    }
}