C#实现ArcEngine9.0最短路径算法

public Form1()
        {
            InitializeComponent();
            m_ipActiveView = axMapControl1.ActiveView;
            m_ipMap = m_ipActiveView.FocusMap;
            clicked = false;
            pGC = m_ipMap as IGraphicsContainer;
        }
        public void OpenFeatureDatasetNetwork(IFeatureDataset FeatureDataset)
        {
            CloseWorkspace();
            if (!InitializeNetworkAndMap(FeatureDataset))
                Console.WriteLine("打开network出错");
        }        
        //路径成本
        public double PathCost
        {
            get { return m_dblPathCost; }
        }
        //返回路径的几何体
        public IPolyline PathPolyLine()
        {
            IEIDInfo ipEIDInfo;
            IGeometry ipGeometry;
            if (m_ipPolyline != null) return m_ipPolyline;

            m_ipPolyline = new PolylineClass();
            IGeometryCollection ipNewGeometryColl = m_ipPolyline as IGeometryCollection;//引用传递

            ISpatialReference ipSpatialReference = m_ipMap.SpatialReference;

            IEIDHelper ipEIDHelper = new EIDHelperClass();
            ipEIDHelper.GeometricNetwork = m_ipGeometricNetwork;
            ipEIDHelper.OutputSpatialReference = ipSpatialReference;
            ipEIDHelper.ReturnGeometries = true;
            IEnumEIDInfo ipEnumEIDInfo = ipEIDHelper.CreateEnumEIDInfo(m_ipEnumNetEID_Edges);
            int count = ipEnumEIDInfo.Count;
            ipEnumEIDInfo.Reset();
            for (int i = 0; i < count; i++)
            {
                ipEIDInfo = ipEnumEIDInfo.Next();
                ipGeometry = ipEIDInfo.Geometry;
                ipNewGeometryColl.AddGeometryCollection(ipGeometry as IGeometryCollection);
            }
            return m_ipPolyline;
        }
        //解决路径
        public void SolvePath(string WeightName)
        {
            try
            {
                int intEdgeUserClassID;
                int intEdgeUserID;
                int intEdgeUserSubID;
                int intEdgeID;
                IPoint ipFoundEdgePoint;
                double dblEdgePercent;
                ITraceFlowSolverGEN ipTraceFlowSolver = new TraceFlowSolverClass() as ITraceFlowSolverGEN;
                INetSolver ipNetSolver = ipTraceFlowSolver as INetSolver;
                INetwork ipNetwork = m_ipGeometricNetwork.Network;
                ipNetSolver.SourceNetwork = ipNetwork;