private void load_data_2_grid()
{
US_RPT_LUONG v_us = new US_RPT_LUONG();
DataSet v_ds = new DataSet();
v_ds.Tables.Add(new DataTable());
v_us.HienThiBangLuong(v_ds, Convert.ToDecimal(m_txt_thang.Text), Convert.ToDecimal(m_txt_nam.Text));
m_grc.DataSource = v_ds.Tables[0];
}