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POUsing TabContainer OnDemand feature to lazy load UserControl, when to perform work?
 

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    <p>I'm trying out the OnDemand feature of the ASP.NET Ajax Control Toolkit TabContainer to delay execution of expensive operations until the tab is loaded.</p> <p>On my page there are a few tabs, and each tab's content consists of a single user control</p> <pre><code>&lt;ajaxToolkit:TabContainer ID="TabContainer1" ActiveTabIndex="0" OnDemand="True" runat="server"&gt; &lt;ajaxToolkit:TabPanel ID="TabPanel1" HeaderText="tab 1" runat="server" &gt; &lt;ContentTemplate&gt; &lt;UC:Tab1 runat="server" /&gt; &lt;/ContentTemplate&gt; &lt;/ajaxToolkit:TabPanel&gt; &lt;ajaxToolkit:TabPanel ID="TabPanel2" HeaderText="tab 2" runat="server"&gt; &lt;ContentTemplate&gt; &lt;UC:Tab2 runat="server" /&gt; &lt;/ContentTemplate&gt; &lt;/ajaxToolkit:TabPanel&gt; &lt;/ajaxToolkit:TabContainer&gt; </code></pre> <p>Each of these user controls is then wired up to a presenter with a custom MVP framework I inherited. The presenter is executed in OnLoad</p> <pre><code>// In user control protected override void OnLoad(EventArgs e) { base.OnLoad(e); presenter.BuildView(); // this is what I want to delay until the tab is active } </code></pre> <p>Since OnLoad is always called, regardless of the tab being active, I know it's the appropriate event to attach to. What is the proper event to attach to, so that I can achieve the same effect as the <a href="http://stephenwalther.com/archive/2011/11/16/ajax-control-toolkit-november-2011-release.aspx" rel="nofollow">example provided here</a> with the SqlDataSource's selecting event only firing when the tab is loaded.</p> <p>Maybe override Render? Or CreateChildControls?</p>
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    1. USRyanW
    1. USRyanW
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      1. USSergeyS
 

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