Fail validation if text contains HTML

Question

Using FluentValidation I have a rule that looks like this:

RuleFor(x => x.CodeDescription).Matches(ValidatorUtility.Contains_Html_Regex)
    .WithMessage(EpisodeCodeDescription_Contains_HTML.ErrorMessage());

My ValidatorUtility.Contains_Html_Regex = <[a-z][\s\S]*>

This only fails if a description DOES NOT contain HTML (which is everything).

I want to do the opposite. I want to fail validation if the description contains simple html <html></b><asdf/> etc

Is there a way to create a regex statement (or some other fluentValidation method) that will fail if a field CONTAINS html?

@mjwills `My ValidatorUtility.Contains_Html_Regex value is <[a-z][\s\S]*>` — crthompson, Jan 26 '19 at 05:44

score 1 · Accepted Answer · edited Jan 26 '19 at 06:59

1

You have a few options.

Use When or Unless.
Change your regex to match a non match.
Pass in a lambda.

RuleFor(x => x.CodeDescription) .Must(x=> !Regex.IsMatch(x, ValidatorUtility.Contains_Html_Regex));

edited Jan 26 '19 at 06:59

Isma

answered Jan 26 '19 at 06:46

Alexander Higgins

1 Answers1