ModalPopupExtender closes when UpdatePanel inside is updated

Question

I have a ModalPopupExtender with an UpdatePanel inside. The UpdatePanel has a Repeater with a list of LinkButtons.

<asp:Button ID="btnShow" runat="server" />
<ajaxToolkit:ModalPopupExtender ID="mpe" runat="server" TargetControlID="btnShow" PopupControlID="pnl" CancelControlID="btnCancel" />
<asp:Panel ID="pnl" runat="server">
    <asp:UpdatePanel ID="up" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:Repeater ID="rep" runat="server" onitemcommand="rep_ItemCommand">
                <HeaderTemplate>
                    <ul>
                </HeaderTemplate>
                <ItemTemplate>
                    <li>
                        <asp:Label ID="lblAssignedTo" runat="server" Text='<%# Eval("AssignedTo") %>' />
                        <asp:LinkButton ID="lnkUnassign" runat="server" CommandName="Unassign" CommandArgument='<%# Eval("Id") %>' />
                        <ajaxToolkit:ConfirmButtonExtender ID="cbeUnassign" runat="server" TargetControlID="lnkUnassign" ConfirmText="Are you sure you want to unassign this item?" />
                    </li>
                </ItemTemplate>
                <FooterTemplate>
                    </ul>
                </FooterTemplate>
            </asp:Repeater>
        </ContentTemplate>
    </asp:UpdatePanel>
</asp:Panel>

protected void rep_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    if (e.CommandName == "Unassign")
    {
        //do something
        up.Update();
    }
}

When I click on a LinkButton, the UpdatePanel should update. It does this but it closes the ModalPopupExtender also.

Is there any way to update the UpdatePanel without hiding the ModalPopupExtender? I can just call ModalPopupExtender.Show(), but the page flickers.

Thanks.

Answer 1

Okay, just found out that there's something wrong with LinkButtons inside Repeaters. Used a Button control instead.