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Easy String to DateTime, DateTime to String and Formatting

, 28 Aug 2007 CPOL
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Easy String to DateTime, DateTime to String and formatting


In the few years that I have been a software developer, I have work with plenty of different programming languages. The first thing that causes you headaches in all of those languages are dates and how to work with them. In this little tutorial, I would like to show you how to work with dates in C# .NET 2.0.

String to DateTime

 // String to DateTime
 String MyString;
 MyString = "1999-09-01 21:34 PM";
 //MyString = "1999-09-01 21:34 p.m.";  //Depends on your regional settings

 DateTime MyDateTime;
 MyDateTime = new DateTime();
 MyDateTime = DateTime.ParseExact(MyString, "yyyy-MM-dd HH:mm tt",

DateTime to String

 //DateTime to String
 MyDateTime = new DateTime(1999, 09, 01, 21, 34, 00);
 String MyString;
 MyString = MyDateTime.ToString("yyyy-MM-dd HH:mm tt");

Format String For Dates

Your format string is your most important key. In most of my projects, I make it a constant and then refer to the constant value in my code.

The following is the most commonly used format characters:

d - Numeric day of the month without a leading zero.
dd - Numeric day of the month with a leading zero.
ddd - Abbreviated name of the day of the week.
dddd - Full name of the day of the week.

f,ff,fff,ffff,fffff,ffffff,fffffff - 
	Fraction of a second. The more Fs the higher the precision.

h - 12 Hour clock, no leading zero.
hh - 12 Hour clock with leading zero.
H - 24 Hour clock, no leading zero.
HH - 24 Hour clock with leading zero.

m - Minutes with no leading zero.
mm - Minutes with leading zero.

M - Numeric month with no leading zero.
MM - Numeric month with a leading zero.
MMM - Abbreviated name of month.
MMMM - Full month name.

s - Seconds with no leading zero.
ss - Seconds with leading zero.

t - AM/PM but only the first letter. 
tt - AM/PM ( a.m. / p.m.)

y - Year with out century and leading zero.
yy - Year with out century, with leading zero.
yyyy - Year with century.

zz - Time zone off set with +/-.


I hope that this helped a bit, even if it is only as a reference to create new format strings. (Always handy!!!Smile | :) )

For more information, please visit my site.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Bertus Kruger
Web Developer
New Zealand New Zealand
No Biography provided

Comments and Discussions

GeneralMy vote of 4 PinmemberHeriberto Lugo12-Oct-14 15:19 
GeneralMy vote of 1 Pinmemberjosephmundadan4-Aug-14 12:56 
GeneralRe: My vote of 1 Pinmemberwarnerlego10-Oct-14 21:17 
GeneralMy vote of 3 Pinmemberluckyrockstar50518-Jul-14 4:10 
GeneralWorks perfectly PinmemberMember 83423408-Apr-13 5:40 
GeneralGood one. Pinmemberbilal7869917-Mar-13 23:01 
QuestionAbout time zone PinmemberRomain TAILLANDIER21-Nov-12 0:24 
QuestionDatetimepicker culture PinmemberRaghavendra Rao 55819-Nov-12 2:51 
GeneralMy vote of 5 Pinmembersmall219-Sep-12 22:04 
GeneralMy vote of 5 PinmemberMenon Santosh24-Jan-12 0:47 
NewsIts been years... PinmemberMarcel Valdez6-Jul-11 15:07 
GeneralNice Pinmemberadriancs6-Jun-11 6:57 
GeneralThanx Pinmemberrudedevil0913-May-11 22:09 
QuestionWhat about this? PinmemberAli Taghvajou6-Apr-11 2:58 
GeneralMy vote of 5 PinmemberPhillip Quinlan12-Sep-10 20:38 
Generalthaks Pinmembermahmoud_samour27-Feb-10 23:56 
GeneralIt was usefull. PinmemberMember 166707124-Feb-10 9:07 
GeneralThankyou :) PinmemberMcdonger12-Feb-10 13:38 
General10x Pinmemberhadaryona15-Sep-09 6:22 
Generalit does not work PinmemberYakovb30-Jul-08 8:07 
GeneralRe: it does not work PinmemberBertus Kruger30-Jul-08 14:40 
QuestionException PinmemberSoumini Ramakrishnan7-Apr-08 22:35 
AnswerRe: Exception Pinmemberishakkulekci24-Jun-08 22:34 
QuestionHow to show month in caps PinmemberSabeessh P2-Jan-08 20:10 
AnswerRe: How to show month in caps PinmemberBertus Kruger3-Jan-08 11:06 

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