[CLOSED] How to load treepanel with httphandler with selected node?

[jchau]

I am loading a treepanel via ajaxproxy and hitting an url that's a httphandler. In the httphandler, I am sending back the NodeCollection.ToJson() to populate the tree. Is it possible to also send back the selected node? Or do I need to do another request?

[Baidaly]

Hello!

I think it's not possible but you can do it without extra request. You need to mark required nodes as selected and listen Load event:

<ext:TreePanel 
    ID="TreePanel1" 
    runat="server" 
    Title="Tree" 
    Height="500"
    Width="200"
    Border="false">
    <Store>
        <ext:TreeStore runat="server">
            <Proxy>
                <ext:AjaxProxy Url="TreeLoader.ashx" />
            </Proxy>
            <Listeners>
                <Load Handler="
                    records.forEach(function(record) { 
                    if (record.get('selected')) 
                        App.TreePanel1.getSelectionModel().select(record); 
                    })"/>
            </Listeners>
        </ext:TreeStore>
    </Store>
    <Root>
        <ext:Node NodeID="0" Text="Root" />
    </Root>
</ext:TreePanel>

TreeLoader.ashx

public void ProcessRequest(HttpContext context)
{
    context.Response.ContentType = "text/json";
    string nodeId = context.Request["node"];

    if (!string.IsNullOrEmpty(nodeId))
    {
        NodeCollection nodes = new NodeCollection(false);

        for (int i = 1; i < 6; i++)
        {
            Node asyncNode = new Node();
            asyncNode.Text = nodeId + i;
            asyncNode.NodeID = nodeId + i;
            nodes.Add(asyncNode);
        }

        for (int i = 6; i < 11; i++)
        {
            Node node = new Node();
            node.Text = nodeId + i;
            node.NodeID = nodeId + i;
            node.Leaf = true;
            nodes.Add(node);
        }
        nodes[0].CustomAttributes.Add(new ConfigItem("selected", "true", ParameterMode.Raw));
        context.Response.Write(nodes.ToJson());
        context.Response.End();
    }
}