Regular expression for invalid characters.

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Hi all

I have set of characters that has to be allowed in a string

Allowed charaters : ' { } [ ] \ ; ' : " , . / ? ! @ # $ % & * ( ) _ + - =

The characters that are not allowed are: ` ~ ^ | < >

can any body give me a regular expression for the above requirement.

I tried this

Regex.IsMatch(@"^[\~|\`|\^|\<|\>]*$")

but didn't work.

It is also validating for an empty string.

Posted 20-Sep-11 8:24am

BharathipriyaMarupudi

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OriginalGriff · Answer 1 · 2011-09-20T08:38:00

I haven't got Expresso loaded, (or VS - don't ask) so this is untested, but I suggest that you remove the leading '^', the trailing '$', and the repeat count '*'.

C#

Regex.IsMatch(@"[\~|\`|\^|\<|\>]")

May work better - at the moment you are looking for a string which consists entirely of zero or more repetitions of your illegal characters only.

Praveen Raghuvanshi · Answer 2 · 2011-09-20T08:33:00

Solution 1

Try this...

http://gskinner.com/RegExr/

Posted 20-Sep-11 8:33am

Praveen Raghuvanshi

Regular expression for invalid characters.

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Regular expression for invalid characters.

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