private void button2_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
int index = dataGridView1.SelectedRows[0].Index;
int id = 0;
bool converted = Int32.TryParse(dataGridView1[0, index].Value.ToString(), out id);
if (converted == false)
return;
Book book = db.Books.Find(id);
AddBooks addBooks = new AddBooks();
addBooks.textBox1.Text = book.name;
addBooks.comboBox1.Text = listGenre.Find(ob => ob.id_genre == book.id_genre).genre1;
addBooks.comboBox2.Text = listAuthor.Find(ob => ob.id_author == book.id_author).firstname;
DialogResult result = addBooks.ShowDialog(this);
if (result == DialogResult.Cancel)
Hide();
book.name = addBooks.textBox1.Text;
book.id_genre = listGenre.Find(ob => ob.genre1 == addBooks.comboBox1.Text).id_genre;
book.id_author = listAuthor.Find(ob => ob.firstname == addBooks.comboBox2.Text).id_author;
db.SaveChanges();
dataGridView1.Refresh();
Refresh();
MessageBox.Show("Объект обновлен");
}
}
private void button1_Click(object sender, EventArgs e)
{
AddBooks addBooks = new AddBooks();
DialogResult result = addBooks.ShowDialog(this);
Book book = new Book();
if (result == DialogResult.Cancel)
Hide();
if (result == DialogResult.OK)
{
book.name = addBooks.textBox1.Text;
book.id_genre = listGenre.Find(ob => ob.genre1 == addBooks.comboBox1.Text).id_genre;
book.id_author = listAuthor.Find(ob => ob.firstname == addBooks.comboBox2.Text).id_author;
//db_lab4Entities db = new db_lab4Entities();
db.Books.Add(book);
db.SaveChanges();
dataGridView1.Refresh();
Refresh();
MessageBox.Show("Добавлена новая книга!");
}
}