Refresh only formview1 and gridview1 by UpdatePanel1

Hi,

 I have a formview1 and gridview inside updated panel on parent page,and I hope to refresh formview1 and gridview1 only after child form closed .

I add the code in Parent-

function Refresh()
{
    __doPostBack('UpdatePanel1', '');
}

In parent form codebehind-

Protected Sub UpdatePanel1_Load(sender As Object, e As System.EventArgs) Handles UpdatePanel1.Load
            GridView1.DataBind()
End Sub

The code work fine.But I can't delete some rows in gridview1,So,what can I do? Thanks.