Hey there.

I've been looking like crazy for a way to implement this kind of behavior, but I can't seem to find one.

I have a group of CustomControls inserted into a page, each of them using 6 or 7 CascadingDropDowns.

In the Page_Load event of the main page, I'm editing each CustomControl with the respective groups of CascadingDropDown.SelectedValue.

The REAL problem here is that, from what I could find with breakpoints, the CascadingDropDowns only populate (through WebService, since it's the only way for CustomControls) after the Page_Load is through, so, after the main stuff shows, it shows the CascadingDropDowns loading. As you might imagine, that loading can take a while, with up to 7 CascadingDropDowns per line. So I'd really like a way to get the populating done during or before the Page_Load event.

What really baffles me is that, in the old Atlas Toolkit version logs, it says the populating started being done before Page_Load.. is there anything I need to do to trigger that kind of behavior? Or anything else I can do to achieve it, apart from editing the Extender myself?

Thanks in advance, and congratulations on a very interesting AJAX toolkit.

Hi Jpof,

As far as I know,   CascadingDropDownExtender creates its instance as soon as all the contents render to client , and then it will call its WebService to generates its contents on client.  So I'm afraid that your goal is not achievable.

Best regards,

Jonathan