Regex to not allow < and >, but allow everything else, including new line

Asked May 07 '19 at 11:21

Active May 07 '19 at 11:23

Viewed 110 times

I am trying to make a custom regex for a textarea field for a form. The regex only need to make sure that the characters < and > is not allowed and only prevent these characters so I can generate a error message for the users to see.

The regex in use at the moment is: ^((?![<>]).)*$ but it does not seem to allow any new lines.

I am using the site regex101 while trying to get to a solution and from what I can understand this regex seems to allow new lines.

Is there anything I'm missing regarding the regex itself or can it be something with sitecore and how it handles regex?

Other notes:

I've tried around with different modifiers, /m /r /s but I can't seem to figure out how they are working and how I should apply them to this regex.

asked May 07 '19 at 11:21

Johannes B

1

Use the `^[^<>]*$` regex. And to make `.` match newlines, there is a `RegexOptions.Singleline` option in .NET – Wiktor Stribiżew May 07 '19 at 11:22
I'd turn this around, see if `` matches and then throw an error otherwise not. – sticky bit May 07 '19 at 11:25
@WiktorStribiżew Thank you very much! To make it clear for my understanding, the problem with my regex right now is that the . character is set to not match single lines? – Johannes B May 07 '19 at 11:27
`.` does not match LF symbols by default in .NET regex. – Wiktor Stribiżew May 07 '19 at 11:31

Regex to not allow < and >, but allow everything else, including new line

0 Answers0