private void load_data_to_grid()
{
if(!check_input_date())
{
return;
}
US_GD_PHU_THUOC_DETAILS v_us_detail = new US_GD_PHU_THUOC_DETAILS();
var v_dt_source = v_us_detail.LayDanhSachGiamTruPhuThuoc(from_date(), to_date());
m_grc.DataSource = v_dt_source;
m_grc.RefreshDataSource();
}