One of my project requirements is to validate a data field(text box from web page). I need to allow alpha numeric characters in all foreign languages (japanese,chinese,korean,russian,latin american characters etc). And avoid special characters.
I am using the expression /[^a-zA-Z0-9]/ (javascript, asp .net page)
Many blogs I have read and not able to correctly understand what exactly I have to do here. I can't add any addons or plugins and have to use the available functionality of regex.
How do regex engine recognize other language characters (esp. Unicode)?
You will need to use Unicode regular expressions. Please check this previous SO thread in which various unicode matching mechanisms are discussed.
