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Posted 10 Oct 2011

DateTime format in .NET 4.0

, 10 Oct 2011 CPOL
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If you have different DateTime pattern (especially separator) in the locale
Lets assume I have the DateTime pattern "dd-MMM-yyyy" in my locale.

DateTime.Now.ToString("yyyy/MM/dd") working different in 3.5 & 4.0 framework.

In 3.5, it uses the pattern given in the parameter to convert the date to string. So, the output would be "2011/11/10" and it the expected result.

But in 4.0, this would return as "2011-11-10" which is not correct. 4.0 is using the current culture's ("-") separator instead of using the pattern's separator ("/") given in the parameter. To fix it, we need to pass IFormatProvider along with the ToString function.

DateTime.Now.ToString("yyyy/MM/dd", DateTimeFormatInfo.InvariantInfo)


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About the Author

Venkatesh Mookkan
Team Leader
Australia Australia
He is from a small village in Tirunelveli, TamilNadu (India). He is fun loving guy. He like to travel a lot. Bikes/Cars/Mobiles are his fantasies.

He started his career as a BPO Data Entry Assistant and got chance to work as an ASP.NET Programmer in the same company after a year. And he move to the next company in 2006 as Software Engineer.

He worked as a Team Leader in a private software development company @Chennai, India for 8+years.

Now working as a Consultant @Sydney, Australia.

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GeneralReason for my vote of 5 Something that is easy to miss and c... Pin
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Venkatesh Mookkan4-Sep-12 16:36
memberVenkatesh Mookkan4-Sep-12 16:36 

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