Regular Expression Validator on Multi-Line TextBox
I have created a regular expression to validate dates in MM/DD/YYYY, MM/YYYY, and YYYY. "((0[1-9]|1)[/]((0[1-9]|[0-9]|3)[/])?)?(19|20)\d\d" . How can I make this expression work with a multi-line textbox, so that a user would be able to enter multiple dates (each on a new line) and still be validated by my expression.