The answer to your dropdown question is to handle the SelectedIndex_Changed event of each drop down. In so far as your other question: are you trying to determine if a date has been selected in the calendar or not? Because, in all reality, when a user enters the page no date will be selected on the calendar so you could do:
if(!Page.IsPostBack){
calendar1.SelectedDate = DateTime.Now();
}
================================================== =========
I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.
================================================== =========
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from planoie's profile
================================================== =========