CascadingDropDown: How to register OnChange event on client?

Hello,

I have a WebForm with three CascadingDropDown. First is the parent of second list and second is the parent of the third list. And third list has a AutoPostBack feature to populate a GridView in an UpdatePanel on the page. My challenge is clear UpdatePanel content when user change first or second lists value.

So how can I register to onChange something like event of the list on client script? Then I can use $get("UpdatePanelClientId").innerHTML="".

Regards.

Hi,

You may use the following code.

<asp:DropDownList ID="DropDownList1" runat="server" Width="170"onchange="$get('ctl00_SampleContent_UpdatePanel1').innerHTML='';"/>

You can try it on the sample website's CascadingDropDown.aspx page.

Hope this helps.