private void AddBorrowOrder() { borrowDate = Convert.ToDateTime(txtBorrowDate.Text); //Creates an object of Borrow class Borrow borrow = new Borrow(memberID, borrowDate, dueReturnDate); //Adds a new borrow order to database int borrowID = borrow.AddBorrowOrder(borrow); for (int i = 0; i < 3; i++) { if (bookID[i] != -1) { //Adds borrow details into database BorrowDetails borrowDetails = new BorrowDetails(borrowID, bookID[i]); } } }