String.Format

Question

4.25/5 (3 votes)

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Hi.
I wanna to add a zero at the left of a number if the number is less than 10, when the users insert it.

Could you guide me, how I can do it with String.Format.
Thanks.

Posted 15-Aug-09 1:13am

Updated 16-Jan-10 6:47am

v2

Comments

Sergey Alexandrovich Kryukov 18-Dec-10 20:46pm

What if you have more than 99 on input. Don't say "never", provide solution for all cases

3 solutions

Or, you can do this:

string myString = string.Format("{0:00}", number);

Posted 17-Jan-10 3:14am

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DaveyM69 · Accepted Answer · 2009-08-15T01:22:00

You can specify a format in the ToString method of the numeric type.
i.e. an int:

int number = 2;<br />string numberString = number.ToString("00");

Posted 15-Aug-09 1:22am

Toli Cuturicu · Accepted Answer · 2010-01-16T05:41:00

C#

static string Method1(int i)
{
    return i.ToString().PadLeft(2, '0');
}

Posted 16-Jan-10 5:41am

Updated 22-Feb-10 1:44am

v2