private void cbYakitTuru_SelectedIndexChanged(object sender, EventArgs e) { if (cbYakitTuru.SelectedItem.ToString() == "Dizel" || cbYakitTuru.SelectedItem.ToString() == "Benzin" || cbYakitTuru.SelectedItem.ToString() == "Benzin/LPG") { cArac a = new cArac(); dgvAraclar.DataSource = a.AraclariGetirByYakitTipi(cbYakitTuru.SelectedItem.ToString()); } else { cArac a = new cArac(); dgvAraclar.DataSource = a.AraclariGetir(); } }