File upload template
This template provides ready-to-use file upload controls that you can build from or copy/paste into your own application. The control shows a progress bar along with percentage to show the upload status. The progress bar's width is set from the uploaded percentage amount, and the percentage text position uses an expression based on the progress amount to place it at the end of the progress bar.
When the file has uploaded, a preview appears along with the ability to delete the image and choose another.
Upon submit, the array of assets is written to an Airdata table.