How do I get two numbers between two words (C#)

Question

I have a string "Building1Floor2" and it's always in that format, how do I cleanly get the building number (e.g. 1) and floor number. I'm thinking I need a regex, but not entirely sure that's the best way. I could just use the index if the format stays the same, but if I have have a high floor number e.g. 100 it will break.

P.S. I'm using C#.

Possible duplicate of [Find and extract a number from a string](http://stackoverflow.com/questions/4734116/find-and-extract-a-number-from-a-string) — cbalos, Dec 07 '15 at 19:01

score 4 · Accepted Answer · answered Dec 07 '15 at 18:56

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Use a regex like this:

Building(\d+)Floor(\d+)

answered Dec 07 '15 at 18:56

coffee-converter

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This will match the entire thing, what's the point? – Fᴀʀʜᴀɴ Aɴᴀᴍ Dec 07 '15 at 18:56
Yes, and it will put the two numbers into capturing groups which you can then use. – coffee-converter Dec 07 '15 at 18:57
Oh i'm sorry I forgot that. – Fᴀʀʜᴀɴ Aɴᴀᴍ Dec 07 '15 at 18:58

score 2 · Answer 2 · answered Dec 07 '15 at 18:57

Regex would be an ok option here if "Building" and "Floor" could change. e.g.: "Floor1Room23"

You could use "[A-Za-z]+([0-9]{1,})[A-Za-z]+([0-9]{1,})"

With those groupings, $1 would now be the Building number, and $2 would be Floor.

If "Building" and "Floor" never changed, however, then regex might be overkill.. you could use a string split

score 0 · Answer 3 · answered Dec 07 '15 at 18:57

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Find the index of the "F" and substring on that.

int first = str.IndexOf("F") ;

String building = str.substring(1, first);

answered Dec 07 '15 at 18:57

nicomp

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How do I get two numbers between two words (C#)

3 Answers3