Hi,
Currently we have no good ideas to let client show the server side progress directly.
Now you can do this thing :
1 , on the server FileValidating event, start a new thread to copy the filedata to database, and return the request directly.
2 , on the client side, you can use the OnTaskComplete event, and start a new function to check the server side status.
We will consider a buildin API for that cool feature.
Regards,
Terry