Regex match of string-numeric patterns

Question

I have a couple of different string-numeric patterns that needs validation during user input.

They look like this

// Always a dash, always a comma
var variant1 = "0-5,99";

// Always a dash, never a comma, always integers
var variant2 = "10-20";

I was thinking of doing something like this but obviously it doesn't work :/

var reg1 = @"(\w{2})-(\w{2})";
var match = Regex.IsMatch(variant2 , reg1);

Thanks

Andy Brown · Accepted Answer · 2014-02-11 15:44:42Z

3

var reg1 = @"^(?:\d+\-\d+,\d+)|(?:\d+\-\d+)$";

This looks for one of two groups, either matching "digit(s) dash digits(s) comma digit(s)"

^\d+\-\d+,\d+$

or matching "digit(s) dash digits(s)"

^\d+\-\d+$

and it uses ^ and $ to force a "whole string" match.

answered Feb 11, 2014 at 15:44

Andy Brown

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Comments

alexbrickwedde · Accepted Answer · 2014-02-11 15:44:27Z

0

"[0-9]+-[0-9]+" ist at least one number, followed by the dash and at least one more number. (May be escape the middle "-", if it does not work)

answered Feb 11, 2014 at 15:44

alexbrickwedde

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This would still match 0-5.99 as true!