Hi Team

I have a requirement to confirm that a String value does not exist in a page list. For example a page list of Student data which has two set of information in every page, RollN and Name. I want to confirm that a Student whose Name/RollN number DOES NOT exist in page list.

Approaches that i tried already are -

pxIsNotInListOfValues.

pxIsNotInListOfValues , this works on local list i guess.

I have written an activity that goes through all the elements of list and match every record to see if given string exist or not. But this is going be costly solution if page list is big. So need any OOTB more efficient solution for this.

I want to perform this check in When rule.

Kindly advice, thanks in advance

Regards

Rajesh