How to add multiline option on RegularExpression attribute?

Question

I am using:

[RegularExpression(@\"^(\"\"|\\[)?[a-zA-Z0-9\']{1,125}(\"\"|\\])?$\")]

to make sure each line of a multiline textbox is properl

Answer 1

You can add an inline option to enable MultiLine without having to add a RegexOptions overload to the Attribute. That also ensures the expression will work in Javascript as well.

    [RegularExpression(@"(?m)^(""|\[)?[a-zA-Z0-9']{1,125}(""|\])?$")]