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); m_sle_chon_don_vi.Properties.DataSource = v_ds.Tables[0]; }