Code behind for button to Insert Multiple records from selected controls into SQL Server database from an asp.net form

Hi all,
I have an asp.net form and many dropdowns to generate a timetable, I have a save Timetable button. i need code behind for button click event to insert multiple records from the form into CourseTimetable table in SQL Server database Timetabler.mdf. help plz i"m running out of time for my project.....