private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e) { Ogrenci secilenOgrenci = (Ogrenci)dataGridView1.CurrentRow.DataBoundItem; txtAd.Text = secilenOgrenci.Ad; txtSoyad.Text = secilenOgrenci.Soyad; txtTcNo.Text = secilenOgrenci.TcKimlikNo.ToString(); List <string> alist = secilenOgrenci.GetAdres(); listBoxAdres.Items.Clear(); foreach (var item in alist) { listBoxAdres.Items.Add(item); } string[] adresDizi = new string[3]; adresDizi = secilenOgrenci.GetAdres1(); listBoxAdres2.Items.Clear(); foreach (var item in adresDizi) { listBoxAdres2.Items.Add(item); } }