private void addBookButton_Click(object sender, EventArgs e) { int? ID = Convert.ToInt32(idNumericUpDown1.Value); string Author = authorTextBox.Text; // Author 2 string Title = titleTextBox.Text; // Title 3 string Journal = publisherTextBox.Text; // Journal 4 int Year = yearTimePicker1.Value.Year; // Year 5 int Pages = Convert.ToInt32(pagesNumericUpDown1.Value); // Pages 6 int Tom = Convert.ToInt32(tomNumericUpDown3.Value); // Tom 7 int Issue = Convert.ToInt32(issueNumericUpDown2.Value); // Stock 8 // ******************************************************** if (monthDayCheckBox2.Checked) { Month = yearTimePicker1.Value.Month; // Stock 9 Day = yearTimePicker1.Value.Day; // Stock 10 } else { Month = null; Day = null; } string City = cityTextBox.Text; // City 11 string Editor = editorTextBox.Text; // Publisher 12 // ********************************************************** DBItems.Initialize(); DBItems.addJournal(ID, Author, Title, Journal, Year, Pages, Tom, Issue, Month, Day, City, Editor); this.Close(); }