ASP.Net AJAX: ModalPopupExtender Hides on AsyncFileUpload UploadComplete event

hello;

i work with AjaxFileUploadl in ModalPopupExtender and I want that  the modal closes once the upload ends.

I put the event hide () in the event AjaxFileUpload1_OnClientUpload of ModalPopupExtender  but it did not work

here is my code :

protected void AjaxFileUpload1_OnClientUploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e) { Session["filename"] = e.FileName.ToString(); AjaxFileUpload1.SaveAs(Server.MapPath("~/") + "/PDF/" + e.FileName); ModalPopupExtender1.Focus(); }