Convert emoji to hex number

Question

I'm trying to convert an emoji to an hex number or a string.

there is any way to convert this in this : 0x00000000D83DDC71L or D83DDC71

Edit

my code is this:

var bytes = Encoding.UTF8.GetBytes(emoji.ToString()); //emoji is 
var number = BitConverter.ToUInt32(bytes, 0); //number is 2610470896
var emojiCode = unicode.ToString("X"); // emojiCode is 9B989FF0

the problem is that i need my emojiCode to be D83DDC71

i hope is more clear now.

possible duplicate of [convert string to hex-string in C#](http://stackoverflow.com/questions/16999604/convert-string-to-hex-string-in-c-sharp) — MakePeaceGreatAgain, Jul 09 '15 at 12:33
Could you be more specific? There's obvious solutions like converting the filename or hash, but I suppose you thought about that already? — runDOSrun, Jul 09 '15 at 12:33

score 2 · Accepted Answer · answered Jul 09 '15 at 12:48

2

You have to do something like:

var str = "\uD83D\uDC71";
string res = BitConverter.ToString(Encoding.BigEndianUnicode.GetBytes(str)).Replace("-", "");

Note that you want your Unicode string to be in "big endian" mode (so Encoding.BigEndianUnicode)

Probably easier without going through the Encoding conversion:

string res = string.Concat(str.Select(x => ((ushort)x).ToString("X4")));

(ushort and char are nearly the same thing, but ushort is built to be formatted as a number, while char is built to be formatted as a character)

answered Jul 09 '15 at 12:48

xanatos

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@frenk91 You'll have to benchmark it... I don't program for Windows phones nor I do have one of them. – xanatos Jul 09 '15 at 12:55
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I have benchmarket the 2 method and the fastest way is to use the Encoding – frenk91 Jul 09 '15 at 13:00

Li Yuan · Answer 2 · 2020-09-23T11:02:36.020

0

Emoji Unicode is not a single hex number, and it only encoding by UTF32. So you could split it, like this:

byte[] utfBytes = System.Text.Encoding.UTF32.GetBytes("");
print(utfBytes.Length);
for (int i = 0; i < utfBytes.Length; i += 4)
{
     if (i != 0) result += '-';
     result += System.BitConverter.ToInt32(utfBytes, i).ToString("x2").ToUpper();
}

edited Sep 23 '20 at 11:02

answered Sep 23 '20 at 06:45

Li Yuan

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Welcome to StackOverflow. Please do not post code without explanation. Please share with us your thoughts why do you think your proposed solution might help the OP. – Peter Csala Sep 23 '20 at 06:49

Convert emoji to hex number

2 Answers2