Regex not working as expected for Alphanumeric and Some special characters

Question

Can anyone let me know the regex for accepting Alphanumeric, a blank space and some special characters? Nothing is mandatory here.

i have already tried:

@"[-\w.?!,\(\)\-\+\'\;\:\&\""\@\s]"

but this is not working. I am doing this validation on server side and not in javascript. The special characters it should accept are: .?!,()-_+';:&""@ 123abc&@ - valid,
123 - valid,
abc - valid,
&"@ - valid,
213^ - invalid,
^% - Invalid.

Can you provide a couple examples of strings that would pass the regex? — Daniel Brown, Sep 09 '15 at 17:08
The special characters it should accept are: .?!,()\-_+';:&""@ 123abc&@ - valid, 123 - valid, abc - valid, &"@ - valid, 213^ - invalid, ^% - Invalid. — Mirage, Sep 09 '15 at 17:08
@SamIam this is my test string : "123abc()^%" This should fail, but its passing rite now. — Mirage, Sep 09 '15 at 17:11
@Mayur please edit your post instead of adding comments. Also I'd recommend searching for similar questions (like https://www.bing.com/search?q=c%23+regex+match+alphanumeric+whole+string) as it feels your current question is quite a duplicate of at least one older question. — Alexei Levenkov, Sep 09 '15 at 17:20

score 1 · Accepted Answer · answered Sep 09 '15 at 17:13

1

As @AvinashRaj said, you have to use anchors. Currently you do not use anchors, so the regex you provided finds matching sequence in the middle of given string and returns a match.

Also you can simplify your regex by removing unnecessary escaping symbols.

Regex:

^[-\w.?!,()+';:&"@\s]+$

C# string:

@"^[-\w.?!,()+';:&""@\s]+$"

answered Sep 09 '15 at 17:13

Ulugbek Umirov

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thank you its working fine now. I missed out on the anchor tag. :) – Mirage Sep 09 '15 at 17:19

Regex not working as expected for Alphanumeric and Some special characters

1 Answers1