How to find invisible tree nodes?

[Affan]

Hi,

I am using treeview and in my tree there are few nodes that are visible and few that are not visible depending upon their type. I am trying to find the invisible nodes from client side code using findNodeByText/findNodeByValue functions but it always returns null. is it possible to get hidden nodes? if not then what is the workaround?

[Bozhidar]

Hello Affan,

You can't access the nodes which have their Visible proserty set to "false", because they are not sent to the client by the server. To send all of the nodes to the server, and still have some of them hidden, use the following method:

1. Instead of using  visible="false", use a custom property with a unique name, for example IsClientVisible="false"
2. Add the following function to the OnClientLoad event of the treeview:

unction onClientLoad(sender){
    var tree = sender;
    var nodes = tree.get_allNodes();
    for (var i = 0; i < nodes.length; i++) {
        var isVisible = nodes[i].get_attributes().getAttribute("IsClientVisible");
        if(isVisible!=null && isVisible=="false")
        {
            nodes[i].set_visible(false);
        }
    }
}

Hope this helps.

Kind regards,
Bozhidar
the Telerik team