create a small asp.net code that automatically inserts

I created a small website that is a medical suite. It has electronic medical records and a scheduler. Currently when a patient comes in, the admin person clicks a dropdown box that says yes. I want it so that when the admin person choose yes in the dropdown box, a medical note is automatically created, base on the previous note, but the date is just changed. However is the visit is an initial evaluation a column is updated in a databse, or if there is no previous note the code does nothing.