Regular Expression to match specific string
asp.net, regex
Solution
^TN-(In|Te|Yo|Et)-[A-Z]{2}-[A-Z]{2}-\d{4}-\d{1,4}$
Just as a comment, I recommend you Rubular if you want to improve your regex skills, it's a simple and practical page to have in mind when you need to work with regex
Problem
RegEx has always been my Achilles' heel. I am writing web app, where user will input his identifier. I'm using `RegexValidator` to validate this input. The identifier should be something like this: ``` TN-In-PL-KW-2012-1234 ``` And this is how the identifier is built: - first two letters are always `TN` - followed by hyphen - then two letters, that are either: `In`, `Te`, `Yo` or `Et` - hyphen - two uppercase letters - another hyphen - another two uppercase letters - hyphen - four digits, that are a year, so something between 1970 and 2012 (I can ignore that as long as there are 4 digits) - hyphen - ordinal number that can have from 1 to 4 digits Please help me writing RegEx to match this identifier.