Add zero-padding to a string

Question

How do I add "0" padding to a string so that my string length is always 4?

Example

If input "1", 3 padding is added = 0001
If input "25", 2 padding is added = 0025
If input "301", 1 padding is added = 0301
If input "4501", 0 padding is added = 4501

Answer 1

You can use PadLeft

var newString = Your_String.PadLeft(4, '0');

Answer 2

myInt.ToString("D4");

Answer 3

string strvalue="11".PadRight(4, '0');

output= 1100

string strvalue="301".PadRight(4, '0');

output= 3010

string strvalue="11".PadLeft(4, '0');

output= 0011

string strvalue="301".PadLeft(4, '0');

output= 0301

Answer 4

"1".PadLeft(4, '0');