private void btnKaliciSil_Click(object sender, EventArgs e) { DialogResult dialogresult = MessageBox.Show("Emin misiniz?", "SİL", MessageBoxButtons.YesNo); if (dialogresult == DialogResult.Yes) { foreach (DataGridViewRow row in grdOgrenci.Rows) { if (row.Cells[0].Value != null && row.Cells[0].Value.Equals(true)) { row.Selected = true; row.DefaultCellStyle.SelectionBackColor = Color.LightSlateGray; } else { row.Selected = false; } } foreach (DataGridViewRow row in grdOgrenci.Rows) { if (row.Selected == true) { string b = row.Cells[1].Value.ToString(); Yardimci.Tablo(Yardimci.KaliciSil(b)); } else { continue; } } grdOgrenci.DataSource = Yardimci.Tablo(Yardimci.VeriGetir()); lblKayitBasarili.Text = "SİLİNDİ"; time(); } }