How to write a regular expression which allows numbers and comma and dot (like 2,010.00)

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I need to write a regular expression which allows numbers and Comma

Basically user can enter amount with comma and dot like
@20.22 or 2,010.00

Expression which allows numbers is this but now how to modify the expression to satisfy the requirement.
Regex m = new Regex("^[0-9]");

Please let me know the changes for this,thanks in advance.....

Posted 12-Aug-10 9:07am

Lima3

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Sandeep Mewara · Answer 1 · 2010-08-12T09:23:00

Solution 1

Try tools like:
Regexp Editor[^]
RegexLib[^]

Form the regular expressions the way you want. Try it.

Posted 12-Aug-10 9:23am

Sandeep Mewara

AspDotNetDev · Answer 2 · 2010-08-12T09:34:00

It would go something like this:

^(((([0-9]{1,3},)([0-9]{3},)*[0-9]{3})|[0-9]{1,3})(\.[0-9]+)?)$

You'd have to modify that a bit if you want to exclude leading zeros. If you do want to do that, I recommend you take Sandeep's suggestion and look into constructing it yourself using some of the useful tools freely available to you.