private void load_data_to_sle_loai_lao_dong()
{
US_CM_DM_TU_DIEN v_us = new US_CM_DM_TU_DIEN();
DS_CM_DM_TU_DIEN v_ds = new DS_CM_DM_TU_DIEN();
v_us.FillDatasetByIdLoaiTuDien(v_ds, 6);
m_sle_loai_lao_dong.Properties.DataSource = v_ds.Tables[0];
m_sle_loai_lao_dong.Properties.DisplayMember = CM_DM_TU_DIEN.TEN;
m_sle_loai_lao_dong.Properties.ValueMember = CM_DM_TU_DIEN.ID;
//m_sle_loai_lao_dong.Properties.NullText = "---Chọn loại lao động---";
}