Important Notice - Forums is archived
To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.

Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.
Question about Upload component and submitUpload
Hi!
I have a task for uploading several files and data from form to server.
Task is stated such way, that user chooses several files, but uploading starts upon pressing submit button for all files at same time, and after this all data goes to database.
In theory i set immediate=false and use submitUpload for starting upload.
Ok.
I add events to detect problems in uploads and upload end, to submit data to database.
If i choose all files, all works perfectly, data is uploaded and submitted.
But only one file is mandatory, while i have several files on form, and they can be not provided.
If i don't provide file, i don't get any event after using submitUpload. No start, end or fail.
Is there any way to know on submitUpload, is file provided, or upload not started, or upload failed, or any other sign of abnormal upload process?
Hey Goergy
you have to look this page https://vaadin.com/book/-/page/components.upload.html -_-
good luck