get date from string

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Hi,
I have a string which is like "yyyymmdd.csv" i.e. "20120219.csv"
Question:
How can I find out from this string if the date is last day of the currecnt month.?
Thanks

Posted 28-Feb-12 21:48pm

arkiboys

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Abhinav S · Answer 1 · 2012-02-28T21:58:00

Solution 1

Get a date field into a variable using DateTime.TryParse ie. TryParse(20120219);.
Then just use the DateTime.DaysInMonth method[^] to get the number of days in this month (the month and year argument can be passed using the variable output).

e.g.

DateTime.TryParse(filename,dtLocalDate);
int daysInMonth = DateTime.DaysInMonth(dtLocalDate.Year, dtLocalDate.Month);
if (daysInMonth == dtLocalDate.Day) 
{
   //Last day in month
}

Posted 28-Feb-12 21:58pm

Abhinav S

Comments

arkiboys 29-Feb-12 4:49am

What do you think about this?
private bool IsLastDayOfMonth(DateTime dtDate)
{
DateTime dtTo = dtDate.Date;
dtTo = dtTo.AddMonths(1);
// remove all of the days in the next month
// to get bumped down to the last day of the
// previous month
dtTo = dtTo.AddDays(-(dtTo.Day));

if (dtDate == dtTo)
{
return true;
}
else
{
return false;
}
}

Abhinav S 29-Feb-12 7:22am

Looks ok. Unless I'm missing something.

SteveAdey 29-Feb-12 14:54pm

Wouldn't this be slightly easier:

private bool IsLastDayOfMonth(DateTime dt)
{
return !(dt.AddDays(1).Month == dt.Month);
}

arkiboys 29-Feb-12 7:26am

Thanks