Question

I use ASP.NET 4 and C#.

I need to apply a RegEx to an RegularExpressionValidator control to NOT allow inserting in a TextBox of charters that are not in certain Unicode Categories.

Designation:

• UppercaseLetter
• LowercaseLetter

Answer 1

You can use \p{CLASS} to match unicode character classes:

[\p{UppercaseLetter}\p{LowercaseLetter}]

See the “Supported Unicode General Categories” and “Supported Named Blocks” sections of the Character Classes page on MSDN for a list of supported character classes.

See also this question: Regular expression to catch letters beyond a-z

Edit: Keep in mind that this won’t work in the browser as I don’t think the client implementations of Regex support /p.