Regex to limit string length for strings with new line characters

Question

Looks like a simple task - get a regex that tests a string for particular length: ^.{1,500}$

But if a string has "\r\n" than the above match always fails!

How should the correct regex look like to accept new line characters as part of the string?

I have a <asp:TextBox TextMode="Multiline"> and use a RegularExpressionValidator to check the length of what user types in.

Thank you, Andrey

Answer 1

You could use the RegexOptions.Singleline option when validating input. This treats the input as a single line statement, and parses it as such.

Otherwise you could give the following expression a try:

^(.|\s){1,500}$

This should work in multiline inputs.