private void load_data_to_sle_chuc_vu()
{
US_DM_CHUC_VU v_us = new US_DM_CHUC_VU();
DS_DM_CHUC_VU v_ds = new DS_DM_CHUC_VU();
v_us.FillDataset(v_ds);
m_sle_chuc_vu.Properties.DataSource = v_ds.Tables[0];
m_sle_chuc_vu.Properties.DisplayMember = DM_CHUC_VU.TEN_CHUC_VU;
m_sle_chuc_vu.Properties.ValueMember = DM_CHUC_VU.ID;
m_sle_chuc_vu.Properties.NullText = "---Chọn chức vụ---";
}