private void btThem_Click(object sender, EventArgs e)
{
frChiTietTour frChiTietTour = new frChiTietTour();
frChiTietTour.ShowDialog();
loadDSTour();
}
private void btSua_Click(object sender, EventArgs e)
{
if (curTour != null)
{
frChiTietTour frChiTietTour = new frChiTietTour(curTour);
frChiTietTour.ShowDialog();
loadDSTour();
}
}