ASPxGridView with ASPxUploadControl

<script type="text/javascript">
        function OnGridFocusedRowChanged() {
            grid.GetRowValues(grid.GetFocusedRowIndex(), 'ActivityID;ActivityImage', ProcessRowValues);
        }
        function ProcessRowValues(values) {
            alert(values[0]);
        }
</script>

<dx:ASPxGridView ID="grid"  runat="server" ClientInstanceName="grid">
            <ClientSideEvents FocusedRowChanged="function(s, e) { OnGridFocusedRowChanged(); }" />
</dx:ASPxGridView>
<dx:ASPxUploadControl ID="ASPxUploadControl1"  runat="server">
</dx:ASPxUploadControl>

protected void Page_Load(object sender, EventArgs e)
    {
        grid.KeyFieldName = "ActivityID";
        grid.KeyboardSupport = true;
        grid.DataSource = GetData.GetActivity();
        grid.DataBind();
    }