Convert string to unicode representation

Question

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Converting Unicode strings to escaped ascii string

How can I convert ä... into something like \u0131... ?

is there any Function for doing this ?

p.s :

beside this way : [ sorry @Kendall Frey :-)]

char a = 'ä';
string escape = "\\u" + ((int)a).ToString("X").PadLeft(4, '0');

also `string.isNullOrEmpty` code can be cut and paste , my question is regarding a ready one like `string.isNullOrEmpty` — Royi Namir, Nov 08 '12 at 14:56
Your answer is "no". There is no built-in function for this. You'll have to use @KendallFrey's solution. — Jon B, Nov 08 '12 at 15:00

Kendall Frey · Accepted Answer · 2012-11-08T15:04:54.727

28

Here's a function to convert a char to an escape sequence:

string GetEscapeSequence(char c)
{
    return "\\u" + ((int)c).ToString("X4");
}

It isn't gonna get much better than a one-liner.

And no, there's no built-in function as far as I know.

edited Nov 08 '12 at 15:04

answered Nov 08 '12 at 14:57

Kendall Frey

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2

I suspect there's a way of getting the left-padding correct in the format string instead of calling PadLeft though... – Jon Skeet Nov 08 '12 at 14:58
@JonSkeet -- I believe just changing to `ToString("X4")` and dropping the `PadLeft` will do the trick. – Jon B Nov 08 '12 at 15:05
2

Fine. But I thought of it first :P – Jon B Nov 08 '12 at 15:05
@KendallFrey: Yes, definitely :) – Jon Skeet Nov 08 '12 at 15:05
@JonB What do you mean? Check the time I edited. – Kendall Frey Nov 08 '12 at 15:06
1

Mostly for fun: `var s = "ä"; s = new string(s.SelectMany(c => (int)c > 127 ? ("\\u" + ((int)c).ToString("X4")).ToArray() : new char[] { c }).ToArray());` – Jon B Nov 08 '12 at 15:25
And it should be possible to use `var allEscapes = string.Concat("example".Select(GetEscapeSequence));` to create escape sequences for all code units in the string `"example"`. – Jeppe Stig Nielsen May 23 '18 at 15:45
2019 edition: `string EscapeSequence(char c) => $@"\u{(int)c:X4}";` – Robert Synoradzki Apr 17 '19 at 10:42

score 8 · Answer 2 · answered Nov 08 '12 at 15:04

There is no built-in function AFAIK. Here is one pretty silly solution that works. But Kendall Frey provided much better variant.

string GetUnicodeString(string s)
{
    StringBuilder sb = new StringBuilder();
    foreach (char c in s)
    {
        sb.Append("\\u");
        sb.Append(String.Format("{0:x4}", (int)c));
    }
    return sb.ToString();
}

Convert string to unicode representation

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