How to set page height dynamically

[robops]

Hello,
now I'm making a template,it has 5 dataBands,each dataBand I leave 1cm,so I set default pageHeight to 6(with top,margin 0.5).
At the same time, I need to add some variables to control some of the dataBand enabled or disabled,so that height of rendered content may less than 5.
For example,if I disabled 2 of them,the content height is 5 - 2 = 3,and pageHeight I need is 3 + 1 = 4,so I want to set pageHeight to 4.
I tried to add logic in Get Tag Event,however,it didn't work.The property enabled of every dataBand always be true.
Maybe there's some way to help me to realize.
Thank you.

[Lech Kulikowski]

Hello,

Please send us a sample report with test data that reproduces the issue for analysis.

Thank you.