[Solved] EmptyMessage does not appear when list-box is emptied on the *client*

[Ed]

Hi everyone,

Here's my RadListBox:

<div>
    <telerik:RadListBox id="rlbCountries" runat="server" EnableEmbeddedScripts="false" DataTextField="CountryName" DataValueField="CountryID" EmptyMessage="[No countries selected]" Width="100%" Height="250px" SelectionMode="Multiple"></telerik:RadListBox>
</div>

Here's the client-side Javascript code that I use to remove items (countries) after an AJAX call to a web-service:

var rlbCountries = $find(countriesListBoxID);
var items = rlbCountries.get_items();
// clear the current countries
items.clear();

I have found that the list box is correctly cleared; however, the "[No countries selected]" message is not displayed.  If I remove the items on the server (via a post-back), the message is shown.

Has anyone else noticed this?  Is there something I can do to the list-box object on the client in order for the message to be shown?

Ed Graham

[Nencho]

Hello Ed,

I was able to replicate the described issue and it is a bug, which I have already forwarded to our developer team. As a workaround, I would suggest you to call the private method _updateEmptyMessageVisibilty(), which would manage the visibility of the EmptyMessage. Please consider the following implementation:

var rlbCountries = $find("rlbCountries");
           var items = rlbCountries.get_items();
           items.clear();
           rlbCountries._updateEmptyMessageVisibilty();

Regards,
Nencho
Telerik

[Ed]

Excellent, Nencho -- that's fixed it.  Thanks very much.