asp.net - 如何使用 ModalPopupExtender 停止显示模式？

Question

<asp:UpdatePanel ID="pnlModal" runat="server" 
    ViewStateMode="Inherit"
    ChildrenAsTriggers="true">
    <ContentTemplate>
        // enter code here.
    </ContentTemplate>
</asp:UpdatePanel>
<ajaxToolkit:ModalPopupExtender ID="mAdd" runat="server" 
    PopupControlID="pnlModal" 
    TargetControlID="hftest" 
    BackgroundCssClass="modalBackground">
</ajaxToolkit:ModalPopupExtender>

<asp:HiddenField ID="hftest" runat="server" />

标签： asp.netwebformsajaxcontroltoolkitmodalpopupextender