set index from java script

[Dominik]

Hello, I try from client side (java script) set index for RadListBox.

How can I use document.getElementById for finding and set index for RadListBox ?

regards,
Dominik Kolcio

[Shinu]

Hi Dominik,

You can access the RadListBox using $find method and get the index as shown below.

JS:

<script type="text/javascript">
    function pageLoad()
    {
        var list = $find("<%= RadListBox1.ClientID %>");
        var items = list.get_items();
        list.trackChanges();
        var item = new Telerik.Web.UI.RadListBoxItem();
        item.set_text("New");
        item.set_value("Value");
        items.add(item);
        list.commitChanges();
        alert(item.get_index());
    }
</script>

Thanks,
Shinu.

[Dominik]

Yes, I try this before.
When try to run app:
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

But this problem I solved with RadScriptBlock.

but I still can't set index in RadListBox from java script :(
I don't need add any Items, because my RadListtBox is populated with data.

I need select item by index.

[Dominik]

I solved the problem.

With clearSelection
getItem and select

thank you Shinu

Dominik