private void dgvkm_Click(object sender, EventArgs e)
{
DTO_KhuyenMai km = busKM.curKM(dataGridView1.CurrentRow.Cells["TenKM"].Value.ToString());
txtMaKM.Text = km.MaKM;
txtTenKM.Text = km.TenKM;
txtChietKhau.Text = km.ChietKhau.ToString();
dtpNgBD.Text = km.NgayBD.ToString();
dtpNgKT.Text = km.NgayKT.ToString();
txtMaKM.Enabled = true;
txtTenKM.Enabled = true;
txtChietKhau.Enabled = true;
dtpNgBD.Enabled = true;
dtpNgKT.Enabled = true;
btCapNhat.Enabled = true;
btXoa.Enabled = true;
btLuu.Enabled = false;
}
private void cbKhuyenMai_SelectedIndexChanged(object sender, EventArgs e)
{
km = busKM.curKM(cbTenKM.SelectedItem.ToString());
lbChietKhau.Text = km.ChietKhau.ToString() + "%";
}