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PanelBar - postback on expansion only

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PanelBar
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Sphengle
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Sphengle asked on 11 May 2010, 02:08 PM
I have a panel bar which is divided into sections.  Within each subsection there are RadPanelItems that are links to other pages.  One of the things I do is to put a number such as (59) next to the item text to indicate how many items will be listed when the user clicks on the link. 

With the aid of RadAjaxManager I am updating the links via an Ajax call when the section is expanded. i.e.I am hooking into the ItemOnclick event and updating the links in the expanded section.  However, an Ajax postback occurs when I contract the section as well - it is this postback that I want to avoid. 

Any suggestions on how to do this?

Thanks.

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Yana
Telerik team
answered on 14 May 2010, 12:02 PM
Hi Sphengle,

I suggest you subscribe to OnClientItemClicking event of the panelbar and disable the postback in its handler in case the item is about to collapse. Here is a sample code snippet:

<script type="text/javascript">
    function itemClicking(sender, args) {
        var item = args.get_item();
        if (item.get_level() == 0) {
            if (item.get_expanded() == true)
                item.set_postBack(false);
            else
                item.set_postBack(true);
        }
    }
</script>


All the best,
Yana
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Sphengle
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answered on 14 May 2010, 01:46 PM
Excellent!  That's perfect.  Thank you very much.
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Yana
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Sphengle
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