Hi,
when you upload multiple files , the order is :
uploading file1
server FileValidating for file1
uploading file2
server FileValidating for file2
...
uploading filen
server FileValidating for filen
client OnPostback event
server FileUploaded event
server UploadCompleted event
This is by design , because FileValidating is Uploader Ajax call and you can't change the UI there.
But FileUploaded is fired by page postback , we want developer do the logic there.\
Regards,
Terry