ASP Regular Expression Validator for Multi-line textbox

Question

I need to validate the length of input of a textbox.

The max length property does not work for Multiline textboxes.

The regular expression I have is:

Answer 1

Change .{0,500} to [\s\S]{0,500}. Note that carriage returns won't exactly be ignored; they'll still count toward the 500-character limit.

Of course, if 500 characters is the size of your database field, that's exactly the behavior you want.