calling Event in Control Designer

I have a drop down in the Edit properties window i need to bind one more dropdown based on the one dropdown seleccted index change. Can i know the way to call the selected index changed event.

Hi Aparna,

We have replied to you in the support thread you had open on the same issue, please check our response there. For your convenience I'm pasting our reply below as well:
"Actually, since you'll be working int he designer, you should not make a postback, but rather operate with the data client-side. In your custom designer javascript you can subscribe to the selectedValueChanged event of your control and there you can rebind your second drop down. This will allow you to have access to the selected value of the first dropdown and pass it to the second one.
"

Kind regards,
Boyan Barnev
the Telerik team