Hello Eric,
I think it really depends on what exactly and how you want to achieve.
One thing you can do is use the dataAdapter’s capabilities to add/edit/update information in your tree grid (similar to normal grid CRUD), here is a link to the document page.
If you really insist on submitting it as formData, since this isn’t really a form, you can bind to the form’s submit event and override with the data you need. Here are two topics that might be helpful to you. Topic1 and topic2.
You could also just use the submit event for a trigger on when to send a manual update with the data through an unrelated ajax request.
You can use the treeGrid’s getRows method to extract the information you need and append it to the request.
Best Regards,
Vladimir
jQWidgets team
http://www.jqwidgets.com/