How to make a Dropdown button that has a tree structure
Is it possible to make something like this with DropdownButton (or any other Flutter widget)?
Why my second dropdown of multi level dropdown does not load data
I’m a little new to flutter. I have two DropdownButtons. The second depends on the selection of the first.
The data of the first I retrieve from the database. It poses no problem. Mais le second n’affiche aucune donnée bien que la liste de ses données ne soit pas vide.
First DropdownButton