Hi ocornuau,

Thank you for your reply.

I have tried to replicate behavior using version 11.2 by setting the ContentURL strings in the manner you have but so far LoadOnDemand seems to be operating correctly in my case. After investigating this further and contacting our developers it seems that skipping reload of relative URLs is not supported by WebTab.

WebTab checks on the client the value of ContentUrl with actual src of IFRAME. That will not work if relative URL with ../ or similar is used, because there is no match.

Application may avoid resetting IFRAME.src by processing the client Initialize event of WebTab and changing server-URLs to client URL for all or for some tabs. However, in this case Tab.get_contentUrl() on client or Tab.ContentUrl on server will return not value, which was set on server, but client value or IFRAME.src. WebTab, can not do that as built-in action.

Below is some sample code to implement that:

<script type="text/javascript">
function WebTab1_Initialize(sender, eventArgs)

{
   var tabs = sender.get_tabs();

   for (var i = 0; i < tabs.length; i++) {
       var tab = tabs[i];
       if (tab.get_contentUrl())       // note: second 
parameter of true will not reset IFRAME.src, but only change value of 
ContentUrl
      tab.set_contentUrl(tab.get_iframe().src, true);
      }
   }
}

</script>

<ig:WebTab ID="WebTab1" runat="server" Height="200px" Width="300px">    
     ...
     <ClientEvents Initialize="WebTab1_Initialize" />
</ig:WebTab>

Attached is also my working sample which you could test to see if the issue persists there.

Please let me know if this is helpful.

Hi ocornuau,

Thank you for the sample.

I was able to replicate the behavior and this seems to be case with unsupported skipping reloads described in my previous post.However, I was able to set the URL of the tab in question so that it is loaded only once is by uhandling the client side Initialize event and giving is the absolute URL. For instance:

function WebTab1_Initialize(sender, eventArgs)
{
    sender.get_tabs()[2].set_contentUrl("http://localhost:XXXX/WebTabContentURL/NewDir/Nested.aspx", true);
}

Please contact me if you have any questions.

Best Regards,