We are using Nintex Forms & Workflow for SharePoint 2013.

I need to call a workflow from my form, keep the form open, and return data (from SQL query) to the form to populate a multi-select list box. I need it to work in both New & Edit modes.

I tried a Save & Submit (no validation) button which calls the workflow but closes the form so that's no good.

I guess the workflow will need to be called from a button with JavaScript but will this still be able to access data from the form as the item has not been created in New mode?

Any help/examples will be very welcome.

Thanks, Phil