Hi craymers,

 You can set the Upload type to “IFrame” for the IE 9 browser, it will work with keyboard. But the iframe mode only support o set 1 file at one time. It does not support multiple files select function.

 protected override void OnLoad(EventArgs e)

        {

            if(is IE9)

            {

                uploader1.UploadType="IFrame";

            }

            base.OnLoad(e);

        }

Regards,

Ken