Convert any value to Hex with variable length

Question

I am trying to convert values of type int32 of variable size to a hex string with minimal length and 0 padding.

Example: 434 = 01 B2

There are several C# ways, but they all have fixed size, depending on the value type, (Example: Int32 will always give a 4 bytes value like 00 00 00 01 for the number 1).

One can write a code to do it, but I assume there is a shorter way.

thanks

samtal

Spaces are not functionally required, but they make it more readable for debugging and maintenance. Can be left out if it makes a difference. — samtal, Dec 14 '13 at 12:44

score 1 · Answer 1 · answered Dec 14 '13 at 08:51

1

int x = 434;
string s = x.ToString("X").PadLeft(5,'0');

This will produce , 001B2

answered Dec 14 '13 at 08:51

crypted

10,118
3
39
52

Thanks, but this is the easy (and wrong) way, and it does not answer my question. I have a **variable** value. can be 1, can be 163158, which can be 1 byte or 3 (for 163158 = 02 7D 56). the PadLeft(5,'0') dictates 5 chars. Besides, Hex bytes must be odd number chars, not 5. I need a solution that will only show the minimum necessary full hex bytes (each 2 chars, padded 0 left), but no padding to the whole number (like 00 00 00 01 for 1). – samtal Dec 14 '13 at 10:51
Sorry, I had an error in the prev comment. I meant "Hex bytes must be **EVEN** number chars", – samtal Dec 14 '13 at 14:46

score 1 · Answer 2 · edited May 23 '17 at 12:03

1

Well, Int3 ὰ's answer is close, just need a further EVEN number handling:

int x = 434;
string s = x.ToString("X");
s = s.Length % 2 == 0 ? s : "0" + s;

About the spaces issue, I didn't figure out a very simple way, however, you can look at this

edited May 23 '17 at 12:03

Community

1
1

answered Dec 15 '13 at 01:00

WAKU

290
3
17

score 0 · Answer 3 · answered Dec 15 '13 at 09:37

Thanks WAKU for the missing part that was s = s.Length % 2 == 0 ? s : "0" + s; I solved the space (or any char) by byte iteration and double padding as follows: (Not really clean but working)

    int i; string d;
        long x = 258458685;
        string s = x.ToString("X");
        s = s.Length % 2 == 0 ? s : "0" + s;
        for (i = 0; i < s.Length  ; i = i + 2)
        {
            d = s.Substring(i ,2);
            Console.Write(d.PadLeft(2, '0').PadLeft(3,' '));
        }

Result: 0F 67 C4 3D

Convert any value to Hex with variable length

3 Answers3