Question

I have dropdown on my page, I am changing selected value of dropdown from popup window using Javascript. I have some logic in dropdown SelectedIndexChanged event, so I need to fire the SelectedIndexChanged event when dropdown selection changed from Javascript.

Answer 1

document.getElementById('<%= yourDropdown.ClientID %>').onchange();

This should work, if you are still getting some error, you can try like this:

setTimeout('__doPostBack(\'yourcontrolClientSideID\',\'\')', 0);

yourcontrolClientSideID is the ID of Rendered Client ID.