special character replacement

varsh12

hi how can i replace "\\" with "\". because i am using, String.Replace("\\","\"); but it does not work. thanx

OriginalGriff

That is because C# reads a '\' character as a special saying "The next character is a character to replace with something". use

String.Replace ("\\\\", "\\");

or

String.Replace(@"\\", @"\");

Did you know: That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.

Keith Barrow

Normally, you don't need to:

Console.WriteLine("\\");

will output \. You have to do extra work to switch the escaping functionality off (using @ before the string):

Console.WriteLine(@"\\");

will output \\. If you are still having problems, please post extra code so we can see what is going on better.

ragnaroknrol The Internet is For Porn[^]
Pete o'Hanlon: If it wasn't insulting tools, I'd say you were dumber than a bag of spanners.

varsh12

thanks, but this is not work

Keith Barrow

The code I added does work, I checked it, and it is part of the language specification! If you want to output \ you need to use "\\" or @"\" If you want to output \\ you need to use "\\\\" or @"\\" The @ character switches the escaping off. If you are still having problems, I suggest you post more of your code, something else might be happening!

ragnaroknrol The Internet is For Porn[^]
Pete o'Hanlon: If it wasn't insulting tools, I'd say you were dumber than a bag of spanners.

musefan

Is that your actual code? working example...

string s = @"some\\text";
s = s.Replace(@"\\", @"\");
//s should now = "some\text";

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varsh12

Actually i am using xml file. In my xml file contains following text: \u092A\u094B\u0937\u093E\u0939\u093E\u0930 and i want to convert in correspponding letter through httpUtility.htmlEncode(). when i put above code in htmlEncode function, it works properly. when i retrieve this in C# as string it shows like: \\u092A\\u094B\\u0937\\u093E\\u0939\\u093E\\u0930. so this is not convert. please guide me.

PIEBALDconsult

Why do you need to?

PIEBALDconsult

If you are simply looking at the value in the debugger, then those extra back-slashes aren't really there, don't worry about them.

varsh12

i WANT TO RETRIEVE EQUIVALENT VALUE OF THE GIVEN STRING. THE ABOVE CODE VALUE IN SEE IN HINDI IS "POSHAHAR".

PIEBALDconsult

OW! My eyes!

Keith Barrow

And ears...... It turns out the code I posted demonstrating the difference between

Console.WriteLine("\\");
Console.WriteLine(@"\\");

doesn't work. There goes ~10 years of .net experience perhaps I should go back to asking people to switch it off and on again for a living :-)

ragnaroknrol The Internet is For Porn[^]
Pete o'Hanlon: If it wasn't insulting tools, I'd say you were dumber than a bag of spanners.

Luc Pattyn

ahmad25 wrote:

it does not work

that is not informative at all. if you want a good answer, then provide quality information to begin with. Don't say "it does not work", specify what kind of problem there is (compilation error, run-time error, ...) and be specific (error number, exception message, line number, etc). :)

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varsh12

this is my string: \u092A\u094B\u0937\u093E\u0939\u093E\u0930 i used this code:

string unicodeString = HttpUtility.HtmlEncode("\u092A\u094B\u0937\u093E\u0939\u093E\u0930");
MessageBox.Show(unicodeString);

it gives me answer correct as "POSHAHAR" IN HINDI FONT. BUT if we use above text as string it gives

string unicodeString = HttpUtility.HtmlEncode(above_code);
MessageBox.Show(unicodeString);

the string takes value in this form: "\\u092A\\u094B\\u0937\\u093E\\u0939\\u093E\\u0930";

so, it can't work. then my problem is , how am i replace "\\" instead of "\".

Sauro Viti

It is not as you said: in C# each string is unicode and something like "\u092A" is an escape sequence that mean "the unicode character with the code 0x092A. In other words, it is not a sequence of characters, but a single one.

Luc Pattyn

Hi, much better now, I understand you happen to have strings that hold Unicode characters in their \u format (as accepted by the C# compiler), and need them to be interpreted. I wasn't able to locate a .NET class that really supports this, so the best I could come up with is:

static string DecodeUnicode(string s) {
	StringBuilder sb=new StringBuilder();
	while (s.Length!=0) {
		sb.Append((char)int.Parse(s.Substring(2, 4), NumberStyles.HexNumber));
		s=s.Substring(6);
	}
	return sb.ToString();
}

which only accepts strings that consist of groups of six characters (a backslash, a 'u', and 4 hex digits); you may choose to add checks and error handling. It works for your example.

string s="\\\\u092A\\\\u094B\\\\u0937\\\\u093E\\\\u0939\\\\u093E\\\\u0930";
log(s);
s=DecodeUnicode(s);
log(s);

FWIW: I think you got yourself into trouble; most of the time, you should simply avoid having to do this, and have the compiler translate those \uXXXX sequences into single characters! PS: I'm not sure what HttpUtility.HtmlEncode is doing for you. :)

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varsh12

thank u very much,Luc Pattyn Sir!! u r really solved my problem and i m very happy. I always remember your suggestion. thanx. sorry for late reply.