c# - how to call radcombobox selectedIndex changed event from page load -

how can call selectedindexchanged event on page load?

my function looks :

protected void ddlitems_selectedindexchanged(object sender,radcomboboxselectedindexchangedeventargs e) 

how pass radcomboboxselectedindexchangedeventargs e on page load?

please suggest me.

what code have on selectedindexchanged method? can not put block of code in method , call new method selectedindexchanged , page_load?