CSharp String.Format, howto pad numbers with zeros

[davesf]

I stumbled upon this question about padding with zeros in csharp. Since it's locked and doesn't have the best answer, I decided to post this article..

http://bytes.com/topic/c-sharp/answers/443581-string-format-padding-zeros

This page lists the string formatting operators valid as ToString arguments. While it's not obvious, these are all also valid in String.Format()

http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx

Therefore, if this is what you need:

Input number Need
1 00000001
121 00000121
10567 00010567

You can get it by doing:

String.Format(" {0:D8}",1);
String.Format(" {0:D8}",121);
String.Format(" {0:D8}",10567);

[RhysW]

Feel i should also point out this is useful for snipping off the ends of ridiculously long decimal numbers too if properly used, simple yet effective piece of code

[PsychoCoder]

You could also use String.PadRight and String.PadLeft for this.