Hi there,

I am wondering:

1. I create a button to show Upload widget ("display: none;") with javascript:

document.getElementById($parameters.WidgetId).click();

2. when firstly i click the button, it works normally - the Onchange event of the Upload is called:

Unfortunately, for the second try, the On Change event is not called (silent). 

How to solve this?

I attach the simple oap here.

thanks and regard