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1、最短路径分析（源码）using System; ArcEngine using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.NetworkAnalysis;/12namespace GisEditor / / 最短路径分析 / public class ClsPathFinder private IGeometricNetwork m_ipGeometricNetwork;private IMap m_ipMap;private IPointCol
2、lection m_ipPoints;private IPointToEID m_ipPointToEID;private double m_dblPathCost =0;private IEnumNetEID m_ipEnumNetEID_Junctions;private IEnumNetEID m_ipEnumNetEID_Edges;private IPolyline m_ipPolyline;#region Public Function/返回和设置当前地图public IMap SetOrGetMap set m_ipMap = value;getreturn m_ipMap;/打
3、开几何数据集的网络工作空间public void OpenFeatureDatasetNetwork(IFeatureDataset FeatureDataset) CloseWorkspace(); if (!InitializeNetworkAndMap(FeatureDataset)Console.WriteLine( “打开 network 出错“);/输入点的集合public IPointCollection StopPointssetm_ipPoints= value;getreturn m_ipPoints;/路径成本public double PathCostget retur
4、n 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;ISpatialReference ipSpatialReference = m_ipMap.Spa
5、tialReference;IEIDHelper ipEIDHelper = new EIDHelperClass();ipEIDHelper.GeometricNetwork = m_ipGeometricNetwork; ipEIDHelper.OutputSpatialReference = ipSpatialReference;ipEIDHelper.ReturnGeometries = true;IEnumEIDInfo ipEnumEIDInfo = ipEIDHelper.CreateEnumEIDInfo(m_ipEnumNetEID_Edges);int count = ip
6、EnumEIDInfo.Count;ipEnumEIDInfo.Reset();for(int i =0;i dblHeight)dblSearchTol = dblWidth / 100;elsedblSearchTol = dblHeight / 100;m_ipPointToEID.SnapTolerance = dblSearchTol;return true ;/关闭工作空间 private void CloseWorkspace()m_ipGeometricNetwork = null;m_ipPoints = null;m_ipPointToEID = null;m_ipEnum
7、NetEID_Junctions = null;m_ipEnumNetEID_Edges = null;m_ipPolyline = null;#endregion 备注：在调用该类时的次序：ClsPathFinder m_ipPathFinder;if(m_ipPathFinder=null)/打开几何网络工作空间m_ipPathFinder = new ClsPathFinder();ipMap = this.m_ActiveView.FocusMap;ipLayer = ipMap.get_Layer(0);ipFeatureLayer = ipLayer as IFeatureLaye
8、r;ipFDB = ipFeatureLayer.FeatureClass.FeatureDataset;m_ipPathFinder.SetOrGetMap = ipMap;m_ipPathFinder.OpenFeatureDatasetNetwork(ipFDB);private void ViewMap_OnMouseDown(object sender, ESRI.ArcGIS.MapControl.IMapControlEvents2_OnMouseDownEvent e)/获取地 图上鼠标输入的点IPoint ipNew ; if( m_ipPoints=null)m_ipPoi
9、nts = new MultipointClass();m_ipPathFinder.StopPoints = m_ipPoints;ipNew = ViewMap.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x,e .y);object o = Type.Missing;m_ipPoints.AddPoint(ipNew,ref o,ref o); m_ipPathFinder.SolvePath(“Weight“);/先解析路径IPolyline ipPolyResult = m_ipPathFinder.PathPolyLine();/最后返回最短 路径
