<asp:fileupload> Why can't I fire code by pressing the open button?

I have an <:asp fileupload> control on a form.  It browses fine and everything but I want to upload the file when I hit the 'open' button on the fileDialog.

Instead, I have to choose the file, 'open it' and then have ANOTHER control that 'Submit's the file.  An extra step.

Similar to <input type=file onChange="loadTheFile">  only <asp:fileupload> control does not have an onChange event.

Instead, I have to do this, an extra step

       <asp:Button id="Load"
           Text="Open It"
           runat="server" style="left: -182px; position: relative; top: -294px">

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Try adding a client side event in Page_Load like

FileUploadControl.Attributes.Add("onchange", "this.form.Load.click()")
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