DateTime with only Year and Day of Year

[O.B.]

Does C# provide an operation for converting year and day-of-the-year
(1-365) to a DateTime object?

[Nicholas Paldino [.NET/C# MVP]]

I would first get the first day of the year and subtract one, like so:

DateTime lastDayOfPrevio usYear = (new DateTime(year, 1, 1)).AddDays(-1);

Then, you can add the number of days to the lastDayOfPrevio usYear and it
will give you the appropriate DateTime:

DateTime dateTime = lastDayOfPrevio usYear.AddDays( days);

Of course, you can just get the first date of the year, and subtract one
from the number of days, like so:

DateTime firstDayOfYear = new DateTime(year, 1, 1);
DateTime dateTime = firstDayOfYear. AddDays(days - 1);
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"O.B." <fu******@bells outh.netwrote in message
news:11******** ************@e9 g2000prf.google groups.com...

Does C# provide an operation for converting year and day-of-the-year
(1-365) to a DateTime object?

[Chris Shepherd]

O.B. wrote:

Does C# provide an operation for converting year and day-of-the-year
(1-365) to a DateTime object?

No, but you could create a DateTime for your year, and add the number of
days to it like:

int year = 2007;
int day = 186;

DateTime d = new DateTime(year, 1, 1).AddDays(day - 1);

MessageBox.Show (d.ToShortDateS tring() + "\n" + d.DayOfYear.ToS tring());
The subtraction is necessary or you'll end up on day 187.

Chris.