[Solved] Problem collapse function in ClientNodeExpanded

[VANDENBERGHE]

Hi everyone,

I didn't succeed in using the javascript function node.collapse() in the OnClientNodeExpanded event. Please, find below my code sample :

ASPX :

<telerik:RadTreeView ID="TreeView1" runat="server" PersistLoadOnDemandNodes="true" Skin="Black" OnNodeClick="RadTreeView1_SelectedNodeClick" OnNodeExpand="RadTreeView1_NodeExpand" OnClientNodeExpanded="ClientNodeExpanded" />

JAVASCRIPT :

   <script type="text/javascript" language="javascript">
        function ClientNodeExpanded(sender, eventArgs)
        {
            var node = eventArgs.get_node();
            if (node.get_nodes() == null
                || node.get_nodes().get_count() == 0)
            {
                node.collapse();
                var toggleElement = node.get_toggleElement();
                if (toggleElement)
                    toggleElement.style.display = "none";
            }
        }
    </script>

The node ExpandMode is ServerSideCallBack. When I run my application, The toggle mark is hide but the node is not collapsed. Is it normal to not be able to use the node.Collapse() method in this event ?

I'm really not be able to compute the number of children of the nodes like in your Demo before trying to expand it. I consume data from another application and it's pretty long for each node. So I need to collapse the node and hide the toggle element after the expand depending on the number of children.

Reagrds,
Sebastien

[VANDENBERGHE]

My previous post is for version 2008.1.415.35 and I just tested with 2008.1.515.20 and for this version the toggle element disappear each time I expand a node even if the node has children... It's like with ServerSideCallback mode, the event OnClientNodeCollapsed is fired before collapse. Is it normal ?

[Atanas Korchev]

Hi VANDENBERGHE,

I have prepared a sample web page which demonstrates the required approach. Please find it attached to this forum thread.

I hope this helps,
Albert
the Telerik team

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[VANDENBERGHE]

Thanks a lot,

Your sample is simply GREAT.

Regards,
Sebastien