OnClick event for particular nodes

[Jason Peetsma]

hi,
       I have lots of nodes in my tree. I want to integrate OnClick event such a way that when i click on particular node(node.Category=="Special") then raise the serverSide OnClick ONLY.
       What is the best way to do this. Obviously, i can filter it in the OnClick event but i do not want to do a postback if the node is not "Special". As i have big tree and only few nodes are "special". Thanks,

Regards,

Brendanwood Dev Team

[Dimitar Milushev]

Hello,

You can handle the OnClientNodeClicking event and check if the node is "Special". If you cancel the client-side NodeClicking event, the TreeView won't postback. Here is a sample snippet:

        <script type="text/javascript">
        function nodeClicking(sender, args)
        {
            if(args.get_node().get_category() != "Special")
            {
                args.set_cancel(true);
                args.get_node().set_selected(true);
            }
        }
        </script>

        <telerik:RadTreeView runat="server" ID="RadTreeView1" OnNodeClick="RadTreeView1_NodeClick" OnClientNodeClicking="nodeClicking">
            <Nodes>
                <telerik:RadTreeNode Text="Node">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Node">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Node" Category="Special">
                </telerik:RadTreeNode>
                <telerik:RadTreeNode Text="Node">
                </telerik:RadTreeNode>
            </Nodes>
        </telerik:RadTreeView>

Canceling the NodeClicking event also prevents selection, so we preserve the default behavior by calling set_selected(true) after we cancel the event.

Kind regards,
Dimitar Milushev
the Telerik team

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[chummy]

content of this function cant be modified??????? when i modify it, it doesnt work.!!!!!!!! what are sender and args???( u didnt set them in call this function!  (OnClientNodeClicking="nodeClicking)   !!!!)   function nodeClicking(sender, args)

{

if(args.get_node().get_category() != "Special")

{

args.set_cancel(true);

args.get_node().set_selected(true);

}

}

[Atanas Korchev]

Hi chummy,

Please check this help article which discusses client-side events. The sender and args arguments are passed by the code which invokes the client-side event.
Another possible solution is to set the PostBack server property to false for nodes which should not postback.

Regards,
Albert
the Telerik team

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