How to convert decimal to hex using c#?

Question

I have a program written in Delphi is converting 11 to 0xB and 28 to 0x1c. I tried to convert 11 (decimal to Hex) in c# using this:-

var deciValue01 = 11;
var deciValue02 = 28;
var deciValue03 = 13;
System.Diagnostics.Debug.WriteLine(string.Format("11 = {0:x}", deciValue01));
System.Diagnostics.Debug.WriteLine(string.Format("28 = {0:x}", deciValue02));
System.Diagnostics.Debug.WriteLine(string.Format("13 = {0:x}", deciValue03));

but the results I am getting is:-

11 = b
28 = 1c
13 = d

Wondering how to convert 11 to '0xB' and 28 to '0x1c' and 13 to '0xD'? Isn't it I need to change from Decimal to Hex?

So you want to add a "0x" prefix? Why not simply add it as a literal? Format("0x{0:X}") — CodesInChaos
– CodesInChaos, Commented Apr 12, 2013 at 18:03
And use `"0x{0:X}" to make the hex characters uppercase instead of lowercase, because it sems you want that. — ford
– ford, Commented Apr 12, 2013 at 18:04
What you are getting is exactly right? Just add Ox to the string you generate? — Security Hound
– Security Hound, Commented Apr 12, 2013 at 19:41

Jon Skeet · Accepted Answer · 2013-04-12 18:04:30Z

2

You just need to use X to make it capital hex digits instead of lower case, and add the 0x yourself:

// Add using System.Diagnostics; at the top of the file... no need to
// explicitly qualify all your type names
Debug.WriteLine(string.Format("11 = 0x{0:X}", deciValue01));
Debug.WriteLine(string.Format("28 = 0x{0:X}", deciValue02));
Debug.WriteLine(string.Format("13 = 0x{0:X}", deciValue03));

Note that the deciValue01 values are neither "decimal" nor "hex" themselves. They're just numbers. The concept of "decimal" or "hex" only makes sense when you're talking about a textual representation, at least for integers. (It matters for floating point, where the set of representable types depends on the base used.)

answered Apr 12, 2013 at 18:04

Jon Skeet

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Kinjal Gohil · Accepted Answer · 2016-09-02 05:00:23Z

1

Try This

int value = Convert.ToInt32(/*"HexValue"*/);
String hexRepresentation = Convert.ToString(value, 16);

answered Sep 2, 2016 at 5:00

Kinjal Gohil

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Kevin · Accepted Answer · 2013-04-12 18:06:17Z

0

It sounds like you want this...

var deciValue01 = 11;
var deciValue02 = 28;
var deciValue03 = 13;
System.Diagnostics.Debug.WriteLine(string.Format("11 = 0x{0:x}", deciValue01));
System.Diagnostics.Debug.WriteLine(string.Format("28 = 0x{0:x}", deciValue02));
System.Diagnostics.Debug.WriteLine(string.Format("13 = 0x{0:x}", deciValue03));

answered Apr 12, 2013 at 18:06

Kevin

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