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How do i set the textbox value to last day of last month(to end of previous month), using today's date.

for example:

if today is 23/03/2012 textbox value should be 29/02/2012 if come next month and date is 12/04/2012 then textbox value should be 31/03/2012 and so on

Thanks

Zaki
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  • possible duplicate of [Get the previous month's first and last day dates in c#](http://stackoverflow.com/questions/591752/get-the-previous-months-first-and-last-day-dates-in-c-sharp) – itsmatt Mar 23 '12 at 12:47
  • Ha... got 4 duplicates just inside this question. Take your pick. – Chris Gessler Mar 23 '12 at 12:52

5 Answers5

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Take the first day of the current month and subtract 1:

DateTime value = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddDays(-1);
mgnoonan
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DateTime date = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddDays(-1);
textBox1.Text = date.ToShortDateString();
ionden
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Use DateTime.DaysInMonth to accomplish this:

var daysInMonth = DateTime.DaysInMonth(dt.Year, dt.Month - 1);
var lastDayInMonth = new DateTime(dt.Year, dt.Month - 1, daysInMonth);
textBox1.Text = lastDayInMonth.ToString("dd/MM/yyyy");
David Morton
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Get the first day of the month and subtract one day. 

DateTime lastDayOfThePreviousMonth = dateSelected.AddDays(-dateSelected.Day);
daryal
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In C#:

DateTime dt = new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1).AddDays(-1);

Then call .ToString() and pass in whatever format you like.

Chris Gessler
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