C# regex to match string

Question

I'm currently having difficulty matching strings with my regex. The objective is to match:

One or two letters
One, two or three numbers
Zero or one asterisk

Such as U21, F305 and H12*. The regex that I'm using is:

\D{1,2}\d{1,3}\*?

However, it's been matching strings like:

3.0L
6HBW20
3/8"
Y1015

I'm not too bright with regex, but this is holding me from completing my project. Can anyone help me out?

Thank you.

Are you matching these strings inside of a larger block of text, or is it the whole string? — mellamokb
– mellamokb, Commented Sep 11, 2014 at 0:13

Casimir et Hippolyte · Accepted Answer · 2014-09-11 00:14:57Z

4

Try using /^[a-zA-Z]{1,2}\d{1,3}\*?$/

The anchors ^ and $ are useful to make sure that you match exactly the pattern you intend. Read up on them :)

edited Sep 11, 2014 at 0:14

Casimir et Hippolyte

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answered Sep 11, 2014 at 0:11

Shiva Garg

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Comments

Nicholas Carey · Accepted Answer · 2014-09-11 00:11:06Z

1

You need to anchor your match. ^ anchors the match to start of line; $ drops anchor at end of line.

Try this regular expression

@"^[\p{L}]{1,2}\d{1,3}[*]?$"

answered Sep 11, 2014 at 0:11

Nicholas Carey

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Comments

mellamokb · Accepted Answer · 2014-09-11 00:08:55Z

0

\D matches any non-digit, which is a much larger set than just letters (basically everything else, including periods, slashes, etc). Try using [a-zA-Z]{1,2} to match 1 or 2 letters.

[a-zA-Z]{1,2}\d{1,3}\*?

answered Sep 11, 2014 at 0:08

mellamokb

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