private void load_data_to_sle_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_don_vi.Properties.DataSource = v_ds.Tables[0];
m_sle_don_vi.Properties.DisplayMember = DM_DON_VI.TEN_DON_VI;
m_sle_don_vi.Properties.ValueMember = DM_DON_VI.ID;
//m_sle_don_vi.Properties.NullText = "---Chọn đơn vị---";
}