Insert the form in the grid (combo whose elements come from

Hello one and all,
I have a problem today with dhtmlx grid, I want to insert the form in my grid (a dropdown list whose elements are from my database) when the user selects the elements and Clicque button send the element are sent to the database and a new row is added to my grid.

other thing, is it possible to create an empty grid, display and build the elements gradually.
Thank you for giving me some of your valuable time.

Doesn’t really related to dataprocessor, as you can use js api to add new row to the form after button in form is pressed.