Crashing the program on a specific date

Question

I use this code to get date

String.Format("{0:yyyy/MM/dd}", Convert.ToDateTime(calender.Text))

It work correct.

But I cannot get 3 special data so my program crashing.

in the day "31" and Month "2" , "4" , "6" for example "1397/06/31"or "1397/04/31"

How to fix it? I use persian date calendar.

I imagine this gves you an errror as those are not valid dates. Months 2,4, and 5 does not have 31 days. — zaza, Oct 04 '18 at 05:51
For persian date times please refer to this answer: https://stackoverflow.com/a/9491805/1300049 — JleruOHeP, Oct 07 '18 at 22:22

score 7 · Answer 1 · answered Oct 04 '18 at 05:50

7

Because there is no such thing as 31st of June, your conversion fails.

You should try parse it:

DateTime.TryParse("1900/06/31", out calendarDay)

And proceed only if conversion was successful (TryParse returns true)

answered Oct 04 '18 at 05:50

JleruOHeP

score 5 · Answer 2 · answered Oct 04 '18 at 05:50

5

It will crash because 31st June, 31st April and 31st February are not valid dates. Why do you want these dates to be as input?

answered Oct 04 '18 at 05:50

progrAmmar

my date is Shamsi – emy shoj Oct 05 '18 at 10:58
Month "2" , "4" , "6" is not june and april and february – emy shoj Oct 05 '18 at 11:00
31st ordibehesht , 31st tir and 31st shahrivar – emy shoj Oct 05 '18 at 11:02
Shamsi as in Persian calendar? – progrAmmar Oct 09 '18 at 01:55
Yes Persian calendar – emy shoj Oct 13 '18 at 15:47

2 Answers2