void KitapYukle()
{
dataGridView2.DataSource = nesne.TumKitaplar();
dataGridView2.Columns[0].Visible = false;
dataGridView2.Columns[1].HeaderText = "Kitap Kod";
dataGridView2.Columns[2].HeaderText = "Kitap Adı";
dataGridView2.Columns[3].HeaderText = "Kategori";
dataGridView2.Columns[4].HeaderText = "Yazar Adı";
dataGridView2.Columns[5].HeaderText = "Raf Numarası";
dataGridView2.Columns[6].HeaderText = "Kitap Bilgisi";
dataGridView2.Columns[7].Visible = false;
}
