protected void ButInsert_Click(object sender, EventArgs e)
        {
            // Set book
            Books book = new Books();

            book.Title     = boxTitle.Text;
            book.Author    = boxAuthor.Text;
            book.SectionId = Convert.ToInt32(ddlSection.SelectedValue);
            book.Ibsn      = Convert.ToInt32(boxIbsn.Text);

            // Set Copy
            Copy     copy   = new Copy();
            DateTime renewD = DateTime.ParseExact(boxRenewal.Text, "dd/MM/yyyy", System.Globalization.CultureInfo.InvariantCulture);

            copy.RenewalDate = renewD;
            DateTime purchaseD = DateTime.ParseExact(boxPurchase.Text, "dd/MM/yyyy", System.Globalization.CultureInfo.InvariantCulture);

            copy.PurchaseDate = purchaseD;

            // Set the number of copies
            int numberCopies = Convert.ToInt32(boxCopies.Text);

            // Insert Book and go the list page
            int bookId = BBooks.insert(book, copy, numberCopies);

            Response.Redirect("~/Book/MainList.aspx");
        }
        protected void buttonInsertBook_Click(object sender, EventArgs e)
        {
            if (Page.IsValid)
            {
                // Insert books
                Books book = new Books();

                book.Title     = boxTitle.Text;
                book.Author    = boxAuthor.Text;
                book.SectionId = Convert.ToInt32(boxSection.Text);

                BBooks.insert(book);
                Response.Redirect("~/ListBooks.aspx");
            }
        }