private void load_danh_sach_don_vi()
{
US_DM_DON_VI v_us = new US_DM_DON_VI();
DS_DM_DON_VI v_ds = new DS_DM_DON_VI();
v_us.FillDataset(v_ds, "order by SO_THU_TU");
m_sle_chon_don_vi.Properties.DataSource = v_ds.Tables[0];
}