filter bad/special characters in c#

Asked Aug 04 '16 at 09:04

Active Aug 04 '16 at 09:04

Viewed 181 times

I have a c# program which is injecting strings into some javascript, the problem is that in those string there are special characters which are breaking the js and end into "illegal token".

I can't identify what special character is use. Is there a way to filter everything ?

I've tried things like that without success:

  retval = new string(input.Where(c => !char.IsControl(c)).ToArray());
  retval = retval.Replace("\u200B", "");

Any idea or hint is very welcomed

asked Aug 04 '16 at 09:04

François Richard

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May be you should do the *reversed* thing: leave *right* characters, say `A-Z`, `a-z`, `0-9` and remove all the other characters? – Dmitry Bychenko Aug 04 '16 at 09:06
and also leave punctuation, I'm a total newbie to c# if you could provide a piece of code it would be very nice of you – François Richard Aug 04 '16 at 09:07
What are "bad" characters at all? You can always store a positive list, for example in a `HashSet` and use `input.Where(positiveChars.Contains)` – Tim Schmelter Aug 04 '16 at 09:08
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http://stackoverflow.com/a/3528628/3928617 – da_sann Aug 04 '16 at 09:08
I think philippe is right, thank you very much – François Richard Aug 04 '16 at 09:10

filter bad/special characters in c#

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