I have 2 dropdownlists bound to datasources in a 2.0 asp.net page.
When the first one changes, the second one does as well because the first control is a parameter in the datasource of the second. When the pages is first loaded, I want to set the value of the first list to a cookie value.
That works, but it isn't causing a postback to update the second list as it does when the user makes a selection. How can I force the first control to do a postback and update the datasource of the second?