Get emoticon's (chars) unicode code

Question

I need to get emoticon's code in format like 1F600 or 128512. It's just a symbol in my string now.

I found that emoticons described in Uniicode encoding, but CharUnicodeInfo.GetNumericValue seems not working.

How can i do this?

Ok

var q = CharUnicodeInfo.GetNumericValue(text[0]);

where text[0] holds emoticon (in debug view it's just a picture) returns -1

"seems not working"? Please read [ask] and post a [mcve] so we can help you. — Camilo Terevinto, Jul 24 '16 at 17:42
Perhaps https://en.wikipedia.org/wiki/Emoticons_(Unicode_block) has the info you're looking for? — Jim Mischel, Jul 24 '16 at 17:50
I need a way to get code by emoji, not emoji by code. But anyway, thank you. — Occam's chainsaw, Jul 24 '16 at 17:53
Then maybe http://stackoverflow.com/questions/20689645/get-emoticon-unicode-from-char-utf-16 is relevant? You should search Stack Overflow for "unicode emoticon". There's a lot of good info there for doing conversions both ways. — Jim Mischel, Jul 24 '16 at 17:54
I did quicksearch by "c#" tag, but didn't found eligible answer. You gave me link to answer with android code. — Occam's chainsaw, Jul 24 '16 at 17:57
Sometimes being a programmer involves studying code in languages that you're not familiar with. — Jim Mischel, Jul 24 '16 at 18:02
I definetely agree. But i think, that this shouldn't be the first step. My question is pretty basic, so it's more logically to find answers in "native" language:) — Occam's chainsaw, Jul 24 '16 at 18:14

score 3 · Accepted Answer · edited May 23 '17 at 10:28

3

You say

text[0] holds emoticon

This is not true.

text[0] holds the first Char. A Char is a 16 bit code unit, but emoticons don't fit in a 16 bit code unit. They are represented by two combining characters.

The first combining character is not a valid codepoint in itself, so trying to get the codepoint value returns -1; an invalid code point.

So how do you get the codepoint?

Return code point of characters in C# explains how you can get a list of all codepoints.

If you only want to get the first codepoint, you can use Char.ConvertToUtf32 directly:

int codepoint = Char.ConvertToUtf32(text, 0)

edited May 23 '17 at 10:28

Community

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answered Jul 24 '16 at 18:20

Martijn

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Thanks a lot. Got to read more about these code points, however. Converting to utf32 worked perfect. Thanks, again. – Occam's chainsaw Jul 25 '16 at 04:53
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@Occam'schainsaw: Start here: http://www.joelonsoftware.com/articles/Unicode.html – Martijn Jul 25 '16 at 18:25

score 0 · Answer 2 · answered Jul 24 '16 at 18:01

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The reason CharUnicodeInfo.GetNumericValue returns -1 for you is because the character you're passing is not a numeric character. You need to read the documentation.

The Unicode value of an emoticon character in that block is a 32-bit value. For example, 0x1F600. So it will be a 32-bit value made up of the two 16-bit values. So if your string contains that emoticon character, the string will be length 2, and the two char values will be 0x0001 and 0xF600. Cast the char values to short and view them as hex. For example:

short c1 = (short)text[0];
short c2 = (short)text[1];

In the debugger, view c1 and c2 as hex.

answered Jul 24 '16 at 18:01

Jim Mischel

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First emoji displayed in text variable is 🗿. After running your code c1 = -10179, c2 = -8705 :С – Occam's chainsaw Jul 24 '16 at 18:10
@Occam'schainsaw: You didn't display the hex value, as I said. The decimal number 128511 works out to 0x0001F5FF. – Jim Mischel Jul 25 '16 at 03:32
The decimal number 128511 works out to 0x0001F5FF. I agree. But i got negative numbers not even near with 128511. Or i misunderstanding something? – Occam's chainsaw Jul 25 '16 at 04:52

Get emoticon's (chars) unicode code

2 Answers2