c#中dataset存取

         [WebMethod]

        public DataSet GetLineByID(long id)

        {

            IndexCommonBasePage basePage = new IndexCommonBasePage();

            string json = string.Empty;

            var dsPole = new DataSet();

            var dtPole = new DataTable();

            dtPole.Columns.Add("Name", typeof(string));

            dtPole.Columns.Add("PoleTypeValue", typeof(string));

            dtPole.Columns.Add("ID", typeof(long));

            dtPole.Columns.Add("AngleDirection.Value", typeof(string));

            dtPole.Columns.Add("AngleDegree", typeof(decimal));

            dtPole.Columns.Add("PoleDistance", typeof(decimal));

            dtPole.Columns.Add("SamePoleLoopNum", typeof(int));

            dtPole.Columns.Add("SeqNo", typeof(decimal));

            dtPole.Columns.Add("VoltageLevelValue", typeof(string));

            dtPole.Columns.Add("Line.ID", typeof(long));

            dsPole.Tables.Add(dtPole);

            Line item1 = basePage.BaseRecordService.GetLineById(id);

            IList<Pole> collectPole1 = basePage.DeviceService.GetPoles(id);

            if (collectPole1 != null && collectPole1.Count > 0)

            {

                foreach (Spf.Domain.Model.Pole i in collectPole1)

                {

                    Line line = new Line();

                    var drPole = dtPole.NewRow();

                    drPole[0] = i.Name;

                    drPole[1] = i.PoleTypeValue;

                    drPole[2] = i.ID;

                    drPole[3] = i.AngleDirection == null ? string.Empty : i.AngleDirection.Value;

                    drPole[4] = i.AngleDegree;

                    drPole[5] = i.PoleDistance;

                    drPole[6] = i.SamePoleLoopNum;

                    drPole[7] = i.SeqNo;

                    drPole[8] = i.VoltageLevelValue;

                    drPole[9] = i.Line == null ? 0 : i.Line.ID;

                    dtPole.Rows.Add(drPole);                   

                    GetPoleByID(i.ID);

                }

            }

            return dsPole;

        }

        [WebMethod]

        public DataSet GetPoleByID(long id)

        {

            IndexCommonBasePage basePage = new IndexCommonBasePage();

            var dsPole = new DataSet();

            var dtPole = new DataTable();

            dtPole.Columns.Add("Name", typeof(string));

            dtPole.Columns.Add("Pole.TypeValue", typeof(string));

            dtPole.Columns.Add("ID", typeof(long));

            dtPole.Columns.Add("AngleDirection.Value", typeof(string));

            dtPole.Columns.Add("AgnleDegree", typeof(decimal));

            dtPole.Columns.Add("Pole.PoleDistance", typeof(decimal));

            dtPole.Columns.Add("Pole.SamePoleLoopNum", typeof(int));

            dtPole.Columns.Add("VoltageLevelValue", typeof(string));

            dtPole.Columns.Add("Pole.ID", typeof(long));

            dsPole.Tables.Add(dtPole);

            Pole pole = basePage.BaseService.GetEntityById<Pole>(id);

            IList<Line> lineNew = pole.NewLines;

            if (lineNew.Count > 0)

            {

                foreach (Spf.Domain.Model.Line item in lineNew)

                {

                    var drPole = dtPole.NewRow();

                    drPole[0] = item.Name;

                    drPole[1] = item.Pole == null ? string.Empty : item.Pole.TypeValue;

                    drPole[2] = item.ID;

                    drPole[3] = item.AngleDirection == null ? string.Empty : item.AngleDirection.Value;

                    drPole[4] = item.Pole == null ? 0 : item.Pole.AngleDegree;

                    drPole[5] = item.Pole == null ? 0 : item.Pole.PoleDistance;

                    drPole[6] = item.Pole == null ? 0 : item.Pole.SamePoleLoopNum;

                    drPole[7] = item.VoltageLevelValue;

                    drPole[8] = item.Pole == null ? 0 : item.Pole.ID;

                    dtPole.Rows.Add(drPole);

                    GetLineByID(item.ID);

                }

            }

            return dsPole;

        }

    }

上面我是我在webservice中的源碼，我想通過GetLineByID得到GetPoleByID中的資料，并填入GetLineByID的dataset中