CascadingDropDown in an UpdatePanel

Hello,

I have some problems with my cascadingdropdown control. Everything on this control worked great, but when I paste it into an UpdatePanel it does not load its items.

Only when I execute a trigger of this UpdatePanel the cascadingdropdown control loads its items correctly.

Where is my problem?

Best regards, _Rodney_

Hi Rodney,

Can you make a simple page that reproduce the issue and post it here?

Hi,

I cannot reproduce the error because in a simple page this error doesn't occur.

My page is too big to post it here, but this only happens if I put the DropDowns and its Cascading-Extender in an UpdatePanel. I even noticed that the Calendar-Extender from the AjaxToolkit does not work either.

I also think it should work according to your description.

But there must be something else in your page that prevent it from working properly.

I finally found the mistake in my website. At start of page I commented out another control, such like

<!--

ControlCode

-->

When I delete this complete comment the application works fine. Is something wrong with these comment??

What controlcode did you comment out?

<!--
<ajax:UpdateProgress ID="UpdateProgress" runat="server">
<ProgressTemplate>
Updating page.
</ProgressTemplate>
</ajax:UpdateProgress>
-->

This control will generate a html dom element on the page, and if it's commented out, this element will be ignored. So, you can't do this.