Adding Date & Time Stamp to Code Using DateTime - C#

It is often useful to add a date or time stamp to files you are processing, or log entries you are adding. To do this we use DateTime.

Here is some sample code using DateTime:

System.DateTime dt = System.DateTime.Now;
            string timeHolder = String.Format("{0:MMddYYYY}", dt);
            Console.WriteLine(timeHolder); //Output: 07122010

You can alter the format of the date and time using different forms of String.Format. Here are some examples:

String.Format("{0:y yy yyy yyyy}", dt);  // "8 08 008 2008"   year
String.Format("{0:M MM MMM MMMM}", dt);  // "3 03 Mar March"  month
String.Format("{0:d dd ddd dddd}", dt);  // "9 09 Sun Sunday" day
String.Format("{0:h hh H HH}",     dt);  // "4 04 16 16"      hour 12/24
String.Format("{0:m mm}",          dt);  // "5 05"            minute
String.Format("{0:s ss}",          dt);  // "7 07"            second
String.Format("{0:f ff fff ffff}", dt);  // "1 12 123 1230"   sec.fraction
String.Format("{0:F FF FFF FFFF}", dt);  // "1 12 123 123"    without zeroes
String.Format("{0:t tt}",          dt);  // "P PM"            A.M. or P.M.
String.Format("{0:z zz zzz}",      dt);  // "-6 -06 -06:00"   time zone