Unicode characters string

Question

I have the following String of characters.

string s = "\\u0625\\u0647\\u0644";

When I print the above sequence, I get:

\u0625\u0647\u062

How can I get the real printable Unicode characters instead of this \uxxxx representation?

I find the question a bit vague, do you control that string? If so, just remove one of the backslashes, ie. "\u1234\u5678". If not, you should consider using regex with a callback method to parse out the number, convert it to a char, and then return that char as a string — Onkelborg, Jul 28 '12 at 12:01
What do you mean by "you can't control the string"? What's your scenario? — Sergei Rogovtcev, Jul 28 '12 at 12:04
Ok I found the answer: System.Text.RegularExpressions.Regex.Unescape() — Marc Andreson, Jul 28 '12 at 12:07
How do you go the otherway, ie. from unescaped string that contains the Unicode character to the \\uXXXX escaped form? PS: I have tried the obvious `Regex.Escape(...)` method, but it doesn't work with the following: tomato sauce #thankyou! — Jaans, Apr 29 '14 at 06:45
@MarcAndreson please add your solution as an answer and mark it as accepted, so that others will see clearly what solved your problem. — Konrad Gadzina, Dec 24 '15 at 11:43

Joey · Answer 1 · 2014-04-17T09:16:28.467

6

If you really don't control the string, then you need to replace those escape sequences with their values:

Regex.Replace(s, @"\u([0-9A-Fa-f]{4})", m => ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString());

and hope that you don't have \\ escapes in there too.

edited Apr 17 '14 at 09:16

answered Jul 28 '12 at 12:05

Joey

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The correct answer that works is System.Text.RegularExpressions.Regex.Unescape() – Marc Andreson Jul 28 '12 at 12:07
1

I believe the MatchEvaluator should be: `m => ( (char) Convert.ToInt32(m.Groups[1].Value, 16) ).ToString()`. – Otiel Apr 17 '14 at 09:00
1

@MarcAndreson Make no mistake, "works" and "correct answer" are not related. – Joseph Lennox May 13 '14 at 18:02
1

Exception thrown: Insufficient Hexadecimal digits. – Jamshaid K. Aug 13 '17 at 09:33

score 3 · Accepted Answer · answered Nov 30 '21 at 19:43

3

Asker posted this as an answer to their question:

I have found the answer:

s = System.Text.RegularExpressions.Regex.Unescape(s);

answered Nov 30 '21 at 19:43

Ruzihm

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Ria · Answer 3 · 2012-07-28T12:09:47.893

1

Try Regex:

String inputString = "\\u0625\\u0647\\u0644";

var stringBuilder = new StringBuilder();
foreach (Match match in Regex.Matches(inputString, @"\u([\dA-Fa-f]{4})"))
{
    stringBuilder.AppendFormat(@"{0}", 
                               (Char)Convert.ToInt32(match.Groups[1].Value));
}

var result = stringBuilder.ToString();

edited Jul 28 '12 at 12:09

answered Jul 28 '12 at 12:04

Ria

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Hakan Fıstık · Answer 4 · 2020-12-04T07:50:09.977

-1

I had the following string "\u0001" and I wanted to get the value of it.
I tried a lot but this is what worked for me

int val = Convert.ToInt32(Convert.ToChar("\u0001")); // val = 1;

if you have multiple chars you can use the following technique

var original ="\u0001\u0002";
var s = "";
for (int i = 0; i < original.Length; i++)
{
    s += Convert.ToInt32(Convert.ToChar(original[i]));
}

// s will be "12"

edited Dec 04 '20 at 07:50

answered Dec 04 '20 at 07:43

Hakan Fıstık

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score -2 · Answer 5 · answered Jul 28 '12 at 12:11

-2

I would suggest the use of String.Normalize. You can find everything here:

http://msdn.microsoft.com/it-it/library/8eaxk1x2.aspx

answered Jul 28 '12 at 12:11

dierre

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`Normalize` does Unicode normalization, this is a *completely* separate concept. – Joey Jul 28 '12 at 13:01

Unicode characters string

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