private void xuat_excel()
{
int[] v_rows_selected = m_grv.GetSelectedRows();
DataTable v_dt_temp = ((DataTable)m_grc.DataSource);
var v_dt_source_export = v_dt_temp.Clone();
foreach(var v_i_row_index in v_rows_selected)
{
var v_dr_to_add = m_grv.GetDataRow(v_i_row_index);
v_dt_source_export.ImportRow(v_dr_to_add);
}
m_grc_only_export.DataSource = v_dt_source_export;
m_grv_only_export.OptionsView.ShowFooter = false;
CHRMCommon.make_stt(m_grv_only_export);
CHRMCommon.ExportExcel(m_grv_only_export);
}