Auto submitting a SAIL form after user uploads a file

Thanks everyone for your inputs.
@ashvink, this is what we are doing at this moment, but that does not help user in doing multiple operations - first browse the file, then click on "Upload" button to submit the form and actually upload the file to KC, and then clicks on Submit.
@sparshs, Our requirement is user will upload one file, then after upload is complete, user should see the file in a grid above (where user can tag some optional attributes to the newly uploaded file), and then user can upload another file etc.
As the files are uploaded, we need to keep the user to the same page so that he can see / click on the files already uploaded.
Once the upload process completes and user is done with tagging attributes to the uploaded files in the grid above, user submits the form.
So user has to Click Browse to upload the file, then click "Upload" button to actually submit the process and upload the file to KC so that we get a valid document Id from Appian and then the other Submit after user provides associated relevant data about these files.

Thanks everyone for your inputs.
@ashvink, this is what we are doing at this moment, but that does not help user in doing multiple operations - first browse the file, then click on "Upload" button to submit the form and actually upload the file to KC, and then clicks on Submit.
@sparshs, Our requirement is user will upload one file, then after upload is complete, user should see the file in a grid above (where user can tag some optional attributes to the newly uploaded file), and then user can upload another file etc.
As the files are uploaded, we need to keep the user to the same page so that he can see / click on the files already uploaded.
Once the upload process completes and user is done with tagging attributes to the uploaded files in the grid above, user submits the form.
So user has to Click Browse to upload the file, then click "Upload" button to actually submit the process and upload the file to KC so that we get a valid document Id from Appian and then the other Submit after user provides associated relevant data about these files.