private void btnDKKH_Click(object sender, EventArgs e)
{
dem = 0;
DangKyKhachHang d = new DangKyKhachHang(null, null, null, null);
d.Show();
}
private void tbnCapNhat_Click(object sender, EventArgs e)
{
dem = 1;
int r = dgvThongTinChiTiet.CurrentCell.RowIndex;
makh = dgvThongTinChiTiet.Rows[r].Cells[0].Value.ToString();
tenkh = dgvThongTinChiTiet.Rows[r].Cells[1].Value.ToString();
diachi = dgvThongTinChiTiet.Rows[r].Cells[2].Value.ToString();
sdt = dgvThongTinChiTiet.Rows[r].Cells[3].Value.ToString();
DangKyKhachHang d = new DangKyKhachHang(makh, tenkh, diachi, sdt);
d.Show();
}