Expand Parent and Child Items Client Side

[Elke Kaminski]

Hi there,

I try to expand the parent and child items in client-side but it seems that you can't. This is my code:

function OnClientItemClicking(sender, eventArgs) {
            var item = eventArgs.get_item();

            if (item.get_expanded()) {
                item.collapse();
            }
            else {
                item.expand();
            }

            var panelBar = $find("ctl00_RadPanelBar1");

            var panelItem = panelBar.findItemByValue("AccountFooter");
            panelItem.show();

            panelItem = panelBar.findItemByValue("TopicFooter");
            panelItem.hide();

            var parentItem = item.get_items().getItem(0);
            parentItem.expand();

            eventArgs.set_cancel(true); // Cancel the postback

        }

Thanks for quick help!
Claudio

[Kate]

Hello Elke,

Looking at the code that you provided I can not find a reason why it is not working as expected. I would suggest that you take a look at the following demo as well where you can find a working example of how to expand/collapse RadPanelItems on the client-side. In case this does not help I would ask you to provide the markup that you use as well as explain the desired functionality that you are trying to achieve.

Kind regards,
Kate
the Telerik team

[Elke Kaminski]

Hi Kate,

the demo doesn't help me.

I have two Root Items in the PanelBar:

Root 1
          --> ParentChild 1
                      --> Child 1
                      --> Child 2
Root 2
          --> ParentChild 1
                      --> Child 1
                      --> Child 2

Initial state is that all Items are collapsed. When clicking the first Root Item and after that clicking the second Root Item the second Root Item expands but the Child items don't. When I click the second root item then twice after that it expands the child items correctly.

When clicking the second Root Item first (from initial state where everything is collapsed) it correctly expands its childitems.

Thanks for quick help!
Claudio

[Kate]

Hi Claudio,

Can you please provide the markup that you are using so I can test you scenario locally and inspect what is causing the behavior that you get? 

Greetings,
Kate
the Telerik team