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How to make a regex match case insensitive?

Anonymous User 2434 03 Feb 2014

I have following regular expression for postal code of Canada.

^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$

It is working fine but accepts only Capital letters. I want it work for both capital and small letters.

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Updated 03 Feb 2014
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1 Answers

Pravesh Singh
Pravesh Singh 03 Feb 2014
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Hi Samuel,

Just use the option IgnoreCase,

So your regex creation could look like this

Regex r = new Regex(@"^[ABCEGHJKLMNPRSTVXY]\d[A-Z]
*\d[A-Z]\d$", RegexOptions.IgnoreCase);

I removed also all your {1} because it is superfluous. Every item is per default matched once, no need to state this explicitly.

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