Question

Regular Expression to detect \/"[]:|<>+=l,?*@ in a string

Asked by: rw8

hi all, i need to write a regular expression to check if there is any of the following special characters: \/"[]:|<>+=l,?*@  in a string using C#

so i've created a regex pattern like this
System.Text.RegularExpressions.Regex pattern = new System.Text.RegularExpressions.Regex("[\/"[]:|<>+=l,?*@]");

But it doesn't work of course,
so i modified it a bit and added in a few escape characters but it still doesn't work
System.Text.RegularExpressions.Regex pattern = new System.Text.RegularExpressions.Regex("[\\/\"\[]:|<>+=l,?*@]");

It seems i have problems with this two characters: "[" and "]". So can anyone tell me how to write the regular expression correctly to detect any of \/"[]:|<>+=l,?*@ ?

Thanks

                        

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Asked On
2004-04-25 at 21:45:51ID20967193
Topic

.NET

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Answers

 

by: dfiala13Posted on 2004-04-25 at 22:58:26ID: 10915695

You just didn't escape enough
[\[\]\\/\"\|:@<>+=,\?\*]

 

by: rw8Posted on 2004-04-26 at 14:19:22ID: 10922670

No, it doesn't work. I've tried it and i still got the unrecognised escape sequence error

 

by: dfiala13Posted on 2004-04-26 at 14:47:15ID: 10922916

The quote causes some issues, this works...

Regex r = new Regex(@"[\[\]\\\|/:@<>+=,\?\*\\" + '"' + "]");

 

by: rw8Posted on 2004-04-26 at 16:19:33ID: 10923478

Thanks dfiala13. Actually i have just figured out the problem. The correct one expression is:
Regex("[[\\]\\\\/\"|:@<>+=;,?*]");  
as the ? *...etc doesn't need escape inside a square bracket.
But since your original comment gave me some idea on what the problem could be, i've still accepted your answer
Thanks

20120131-EE-VQP-002

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