How to disable postback or callback on RadTreeView click event

[William]

Hi, i want to disable postback or callback on RadTreeView when the user click a node, i also want with javascript function get the NavigateUrl and assign it to a iframe, all in client side without server side.

[Princy]

Hi William,

Attach OnClientNodeClicking event to treeview so that you can cancel the postback/callback using the methos set_cancel(true) based on condition. Here is the example that I tried.

JavaScript:

<script type="text/javascript">
    function OnClientNodeClicking(sender, args) {
        if (args.get_node().get_text() == "NavigateUrl") {
            var url = args.get_node().get_navigateUrl(); // get the navigateurl
            var if1 = document.getElementById("iframe1"); // get the iframe client object
            if1.src = url; // Set the url
            args.set_cancel(true);  // Cancell the event
        }
    }
</script>

Thanks,
Princy.

[Mickey]

I only need to cancel the post back
I need the checkbox state to change as well, (original behavior)
I tried to manually change it, but if fail
please advise

[Princy]

Hi Mickey,


If you have attacted "OnNodeClick"  server event, then remove the handler and follow the code as shown below.

Client code:

function OnClientNodeClicked(sender, args) {
    var node = args.get_node();
    node.set_checked(!node.get_checked());
}

Thanks,
Princy.

[Mickey]

when I press the checkbox,
the click event is NOT being fired, only when I press the text,
I would like the control to function exactly as it used to, just without the post back

[Nikolay Tsenkov]

Hello Mickey,

Well, if there is a postback on NodeClick event, then you probably are handling this event on the server. Simply remove the handler if it's not needed.

If you want to conditionally postback, this is another thing - you need to handle the ClientNodeClicking event and if you don't want to post-back, then args.set_cancel(true). If you want to still get the changes that this click does - add them in the handler of ClientNodeClick - for example:

var node = args.get_node();

args.set_cancel(true);

// for selecting the node even when the click is canceled
node.set_selected(true);

If this is still not what you are looking for, please, explain in a bit more detail what seems to be the problem and if needed, please, illustrate it with some code, too


Regards,
Nikolay Tsenkov
the Telerik team

[Mickey]

Thanks,
I have manage to accomplish what I wanted