private void button2_Click(object sender, EventArgs e) { int mabenhnhan = Convert.ToInt32(dataGridView1.Rows[0].Cells[0].Value); 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(); Console.Write("ten:" + ten); TiepTan.updateBenhNhan(conn, mabenhnhan, ten, namsinh, diachilienlac, sdt, trieuchungbenh); }