private void button3_Click(object sender, EventArgs e)
{
string ten = dataGridView1.Rows[0].Cells[1].Value.ToString();
int namsinh = Convert.ToInt32(dataGridView1.Rows[0].Cells[2].Value);
string diachilienlac = dataGridView1.Rows[0].Cells[3].Value.ToString();
int sdt = Convert.ToInt32(dataGridView1.Rows[0].Cells[4].Value);
string trieuchungbenh = dataGridView1.Rows[0].Cells[5].Value.ToString();
TiepTan.addBenhNhan(conn, ten, namsinh, diachilienlac, sdt, trieuchungbenh);
}
