DateTime, formatting, quarters and weeks??

[Michael Howes]

If I have two integers, a week and year how can I create a DateTime object
that is set to the first day of the week of that week/year?

If I have two integers, a quarter and a year, how can I create a DateTime
object that is any date that falls in that quarter?

Is there a DateTime format string to show quarter?

thanks
mike

 

[Miha Markic [MVP C#]]

Michael,

I think you'll have to do some math on your own.

If I have two integers, a week and year how can I create a DateTime object
that is set to the first day of the week of that week/year?

int year = 2004;

int week = 3;

DateTime date = new DateTime(year, 1, 1);

DateTime newDate = date.AddDays(7*week-(int)date.DayOfWeek);

It will give you first sunday of that week.

If I have two integers, a quarter and a year, how can I create a DateTime
object that is any date that falls in that quarter?

Calculate two border dates and compare the actual date against them.

Is there a DateTime format string to show quarter?

Not that I know of.