江DataGirdview中的数据保存到DataTable中

 DataTable dtNewExportInfo = new DataTable();
 dtNewExportInfo = dtDgv.Clone();

 foreach (DataGridViewRow dgvr in dgvDemu.Rows)
 {
    DataRow dr = dtNewExportInfo.NewRow();
    dr = (dgvr.DataBoundItem as DataRowView).Row;
    dr["Fees"] = CalculateFees(dr["containertype"].ToString(), dr["ZQTS"].ToString());
    dtNewExportInfo.Rows.Add(dr.ItemArray);     

 }