Hello everyone, I tried to put this way, but it didn't work, despite the fact that I adjusted the controllers. I'm hoping someone can give me some advice on how to place the Duplicate Records Status or Display Error.
This the problem that i want to fix:
(https://i.ibb.co/8DQTQWy/PROB.png)
I utilize a page event and attempt a two-column test to determine whether a record is duplicate, but the query is failing.
(https://i.ibb.co/kJm9pmN/prob3.png)