private void button4_Click(object sender, EventArgs e) { ChangeEL c = new ChangeEL(); if (c.ShowDialog() == DialogResult.OK) { ScienceBook sb = new ScienceBook() { Name = c.BookName, AmountOfPages = int.Parse(c.Page), Author = c.Author }; libraries.Add(sb); listBox1.Items.Add(sb); } }
private void button3_Click(object sender, EventArgs e) { Book b = libraries[listBox1.SelectedIndex]; ChangeEL c; if (b is ScienceBook) { ScienceBook sb = b as ScienceBook; c = new ChangeEL(sb.Name, sb.AmountOfPages.ToString(), sb.Author); } else { c = new ChangeEL(b.Name, b.AmountOfPages.ToString()); } if (c.ShowDialog() == DialogResult.OK) { b.Name = c.BookName; b.AmountOfPages = int.Parse(c.Page); } }