Question: Is it possible to handle dropdownlist `SelectedIndexChanged` event with `AutoPostBack property = false?`

Answer: 
You can achieve it using JavaScript. e.g.

```
<script language="javascript" type="text/javascript">
    function doPostBack() {
        setTimeout("__doPostBack('yourControlClientID','')", 0);
    }
</script>

```
Yes, it is possible, just add the handler for selected index changed and it will be called back when the form is posted again.