When I enter a boolean Parameter [ByIssueDate] into the "VisibleExpression" field on Page1 properties, it's ignored and the value from the "Visible" field is taken instead, no matter if the ByIssueDate parameter is true or false.
I was expecting, that the "VisibleExpression" will override the "Visible"
Version: FastReport.Net Version 2021.4.15
Try to assign the boolean parameter in Page1.OnBeforePrint event. Anyway, look here:
https://forum.fast-report.com/en/discussion/583/how-to-hide-pages