int to hex string

Question

I need to convert an int to hex string.

When converting 1400 => 578 using ToString("X") or ToString("X2") but I need it like 0578.

Can anyone provide me the IFormatter to ensure that the string is 4 chars long?

Look at numerics formats [here](http://msdn.microsoft.com/en-us/library/dwhawy9k(VS.71).aspx). — Ariel, Jan 14 '11 at 11:25

score 188 · Accepted Answer · answered Jan 14 '11 at 11:22

188

Use ToString("X4").

The 4 means that the string will be 4 digits long.

answered Jan 14 '11 at 11:22

4

It is not good for negative numbers, use a 'short' type instead of 'int' – Mauro Raymondi Jan 27 '16 at 15:54
10

To print an int32 it should just use "X8", not "X4". If you want X4, you should indeed make sure to use an Int16. – Nyerguds Oct 10 '16 at 08:49

0x777 · Answer 2 · 2020-06-05T21:03:53.920

19

Try C# string interpolation introduced in C# 6:

var id = 100;
var hexid = $"0x{id:X}";

hexid value:

"0x64"

edited Jun 05 '20 at 21:03

answered Apr 25 '18 at 21:38

0x777

score 18 · Answer 3 · answered Jan 14 '11 at 11:23

18

Try the following:

ToString("X4")

answered Jan 14 '11 at 11:23

Oded

score 3 · Answer 4 · answered Jan 27 '16 at 16:03

3

Previous answer is not good for negative numbers. Use a short type instead of int

        short iValue = -1400;
        string sResult = iValue.ToString("X2");
        Console.WriteLine("Value={0} Result={1}", iValue, sResult);

Now result is FA88

answered Jan 27 '16 at 16:03

Mauro Raymondi

score 0 · Answer 5 · edited Jun 07 '22 at 15:37

0

Convert int to hex string

int num = 1366;
string hexNum = num.ToString("X");

edited Jun 07 '22 at 15:37

Blanket Fox

answered Mar 17 '22 at 08:26

sadegh salehi

5 Answers5