datagridview增加空行

datagridview增加空行:

 DataRow row;
            row =ds_qj.ds.Tables["工价表"].NewRow ();

        row["工序名称"] ="";
        row["工序名称"] = "";
        row["工序名称"] = "";
        row["工序名称"] = "";
        row["工序名称"] = "";
        ds_qj.ds.Tables["工价表"].Rows.Add(row);