public void load_data_to_grid()
{
DataSet v_ds = new DataSet();
US_GD_CHAM_CONG v_us = new US_GD_CHAM_CONG();
v_ds.Tables.Add(new DataTable());
v_us.FillDatasetNgayPhepTieuChuan(v_ds, m_dat_nam.DateTime.Date, -1);
m_grc_phep_tieu_chuan.DataSource = v_ds.Tables[0];
}