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How to force button do a full postback instead of asynchronous postback

Anonymous User 1862 28-Aug-2014

In an ASP.NET 4.0 web application, I have a user control that is wrapped by an UpdatePanel

<asp:UpdatePanel ID="UpdatePanel5" runat="server" UpdateMode="Conditional">

    <ContentTemplate>

        <UC:MyCustomCtrl ID="customCtrl" runat="server" />

    </ContentTemplate>

</asp:UpdatePanel>

I have an ASP.NET button  in the user control that makes an asychronous request to the server

 The server then creates an Excel spreadsheet and then places the spreadsheet in the HttpResponse to send back to the client's browser so they can open/save it.

 However, it blows up at this point because the request to the server is asynchronous and apparently you can't put a binary in the HttpResponse during an asynchronous request.

How do I get around this?

c#
Updated on 28-Aug-2014
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1 Answers

Sumit Kesarwani

Sumit Kesarwani

28-Aug-2014
Hi Ankita,

you can add triggers to UpdatePanels that allow full post back. here's an example

<asp:UpdatePanel ID="UpdatePanel5" runat="server" UpdateMode="Conditional">
   
<ContentTemplate>
        <UC:MyCustomCtrl ID="customCtrl" runat="server"/>
    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnID" />
    </Triggers>
</asp:UpdatePanel>

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