Ignore case sensitivity in ASP.NET RegularExpressionValidator

Question

I have a RegularExpressionValidator where the only valid input is 8 characters long and consists of the letters MP followed by six digits. At the moment I have the following regex which does work

^(MP|mp|Mp|mP)[0-9]{6}$

but it feels a bit hacky. I'd like to be able to specify that the MP can be any combination of upper and lower case without having to list the available combinations.

Thanks,

David

Answer 1

You can do this when you define Regex object

Regex exp = new Regex(
    @"^mp[0-9]{6}$",
    RegexOptions.IgnoreCase);

Alternatively you can use ^(?i)mp[0-9]{6}$ syntax, which would make just specific bit of regex case-insensitive. But I would personally use the first option (it is easier to read).

For details see documentation on msnd.