How to convert an integer to fixed length hex string in C#?

Question

I have an integer variable with max value of 9999.

I can convert to fixed length string (4-characters):

value.ToString("0000");

and I can convert it to hex:

value.ToString("X");

I want to convert it to a hex string of four characters (padded with 0 at the left if the value is converted to less than four digits hex value). I tried the following which didn't work.

value.ToString("0000:X");

OK, I can check the length of hex string and pad left with zeros.

But is there any straightforward way?

Julien Lebosquain · Accepted Answer · 2011-02-15 07:42:03Z

35

Use a number after the X format specifier to specify the left padding : value.ToString("X4")

answered Feb 15, 2011 at 7:42

Julien Lebosquain

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Jan Dragsbaek · Accepted Answer · 2011-02-15 07:41:36Z

8

String.Format( "{0:X2}", intValue)

answered Feb 15, 2011 at 7:41

Jan Dragsbaek

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1 Comment

justin.m.chase Over a year ago

This will not be fixed length, it does not include leading 0's.

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