private void btnDelete_Click(object sender, EventArgs e) { if (dgvAppointmentList.RowCount > 0) { int appointmentId = (int)dgvAppointmentList.SelectedRows[0].Cells[0].Value; DialogResult dialogResult = MessageBox.Show("Randevuyu silmek istediğinize emin misiniz?", "Randevu Sil", MessageBoxButtons.YesNo, MessageBoxIcon.Information); if (dialogResult == DialogResult.Yes) { appointment = new Appointment() { AppointmentId = appointmentId }; appointmentController.DeleteById(appointment); RefreshAppointment(); } } else { MessageBox.Show("Randevunuz bulunmamaktadır."); } }