public void writeLabel()  
        {
            DataSet myds = dbOp.getDataSet("select _standcolumnName from tb_standcolumnName", "tb_standcolumnName");            SqlDataReader sqldr5 = dbOp.getcom("select count(*) from tb_standcolumnName");
            sqldr5.Read();
            int n = Convert.ToInt32(sqldr5[0].ToString());
            for (int i = 0; i < n; i++)
            {
                string st = myds.Tables[0]; //此处如何将表中每一行数据转按为string呀,那位高手知道怎么解呀?
                cls_write_cotrol write_cotrol = new cls_write_cotrol();
                write_cotrol.writer_Control(groupBox1,st);
            }                   }