Bound DataGrids - relations between them

[Pascal Couture]

Hello!

I have 3 binded datagrid displayed on a form.

There is a parent to children to children relation between them and it works. The correct children info is displayed depending on the current row of it's parent.

The only thing is that I would like the child datagrid to be disabled if there is no parent selected. Is there a way to do that automatically?

Right now, the user can write info in a child datagrid even if there are no rows in the parent grid.

[Pascal Couture]

I forgot. If there is info written in the child datagrid while no parent is selected, I get an error (which is normal and which I wan't to avoid).