CODEWITHSUNDEEP
c#
Zkai
Zkai

Reputation: 211

Get Saturdays of a Month

I'm trying to get the day number of Saturdays of each month.

For example, this month (August) should return: 4, 11, 18, 28

int year = 2018;
int month = DateTime.Now.Month;
DateTime myDT = new DateTime(year, month, 1, new GregorianCalendar());
Calendar myCal = CultureInfo.InvariantCulture.Calendar;

while (myDT.Month == month)
{
    var day = myCal.GetDayOfWeek(myDT);

    if (day == DayOfWeek.Saturday || day == DayOfWeek.Friday)
        Debug.WriteLine(myCal.GetDayOfMonth(myDT));

    myDT.AddDays(1);
}

Once I click the button that executes the code, my UI is frozen with no errors returned. This leads me to believe it's still inside the loop for some reason.

Upvotes: 2

Views: 294

Answers (2)

Eduardo Elias Saléh
Eduardo Elias Saléh

Reputation: 859

Try this:

    const int year = 2018;
    int month = DateTime.Now.Month;

    Calendar myCal = CultureInfo.InvariantCulture.Calendar;
    DayOfWeek[] accepted = new [] { DayOfWeek.Saturday, DayOfWeek.Friday };

    IEnumerable<DateTime> dateTimes = Enumerable.Range(1, DateTime.DaysInMonth(year, month)) 
        .Select(day => new DateTime(year, month, day))
        .Where(d => accepted.Contains(myCal.GetDayOfWeek(d)));

Upvotes: 2

NicoRiff
NicoRiff

Reputation: 4883

You are not assigning it so it maybe be in an eternal loop:

Instead of this:

myDT.AddDays(1);

Do this:

myDT = myDT.AddDays(1);

Upvotes: 2

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