Cancel postback when dropdown closed

[Tauqir]

I am trying to cancel postback when the dropdown is closed, something similar to what is happening here, http://www.telerik.com/help/aspnet-ajax/treeview-onclientnodeclicking.html.

function ClientNodeClicking(sender, eventArgs) {
        var node = eventArgs.get_node();
        if (node.get_text() == "Search") {
            eventArgs.set_cancel(true);
        }
    }
How can I go about doing the same thing for the RadDropDownTree? The functionality on the client side event 
OnClientDropDownClosed should do the trick.

Thanks,
Tauqir.

[Shinu]

Hi Tauqir,

Please have a look  into the following code snippet that I tried to cancel postback on OnClientDropDownClosing event.

ASPX:

<telerik:RadDropDownTree ID="RadDropDownTree1" OnClientDropDownClosing="OnClientDropDownClosing"
    AutoPostBack="true" runat="server" DataSourceID="SqlDataSource1" DataFieldID="id"
    DataFieldParentID="parentid" DataTextField="text" DataValueField="id">
</telerik:RadDropDownTree>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Northwind_newConnectionString %>"
    SelectCommand="SELECT * FROM [Details]"></asp:SqlDataSource>

JavaScript:

<script type="text/javascript">
    function OnClientDropDownClosing(sender, args) {
        if (sender.get_selectedText() == "Item 1") {
            sender._autoPostback = false;
        }
        else {
            sender._autoPostback = true;
        }
    }
</script>

Thanks,
Shinu.

[Tauqir]

Thanks, it works perfectly. :)