1ARCENGINE 最短路径分析(C#源码)2

work(0); INetwork ipNetwork = m_work;
if(m_ipMap!=null) {
m_ipMap = new MapClass(); ipFeatureClassContainer = m_ipGeometricNetwork as IFeatur eClassContainer; count = ipFeatureClassContainer.ClassCount; for(int i =0;i<count;i++) {
IEIDInfo ipEIDInfo; IGeometry ipGeometry; if(m_ipPolyline!=null)return m_ipPolyline;
m_ipPolyline = new PolylineClass(); IGeometryCollection ipNewGeometryColl = m_ipPolyline as IGe ometryCollection;
组, * 在 VB 等其他语言的代码中，只需传人该类型数组的第一个元
素即 * 可，但 C#中的机制有所不同，需要作出如下修改：使用 * ITraceFlowSolverGEN 替代 ITraceFlowSolver */
ITraceFlowSolverGEN ipTraceFlowSolver = new TraceFlow SolverClass() as ITraceFlowSolverGEN;
INetworkCollection ipNetworkCollection = FeatureDataset as
INetworkCollection; int count = ipNetworkCollection.GeometricNetworkCount; //获取第一个几何网络工作空间 m_ipGeometricNetwork = ipNetworkCollection.get_GeometricNet
object [] vaRes =new object[intCount-1]; //通过 findpath 得到边线和交汇点的集合 ipTraceFlowSolver.FindPath(esriFlowMethod.esriFMConnecte d,
esriShortestPathObjFn.esriSPObjFnMinSum, out m_ipEnumNetEID_Junctions,out m_ipEnumNetEID_Edges, intCount-1, ref vaRes); //计算元素成本 m_dblPathCost = 0; for (int i =0;i<vaRes.Length;i++) { double m_Va =(double) vaRes[i]; m_dblPathCost = m_dblPathCost + m_Va; } m_ipPolyline = null; } catch(Exception ex) { Console.WriteLine(ex.Message); } } #endregion
#region Private Function //初始化几何网络和地图 private bool InitializeNetworkAndMap(IFeatureDataset FeatureD ataset) {
IFeatureClassContainer ipFeatureClassContainer; IFeatureClass ipFeatureClass ; IGeoDataset ipGeoDataset; ILayer ipLayer ; IFeatureLayer ipFeatureLayer; IEnvelope ipEnvelope, ipMaxEnvelope ; double dblSearchTol;
ence;
ISpatialReference ipSpatialReference = m_ipMap.SpatialRefer
IEIDHelper ipEIDHelper = new EIDHelperClass(); ipEIDHelper.GeometricNetwork = m_ipGeometricNetwork; ipEIDHelper.OutputSpatialReference = ipSpatialReference; ipEIDHelper.ReturnGeometries = true;
//解决路径 public void SolvePath(string WeightName) {
try
{ int intEdgeUserClassID; int intEdgeUserID; int intEdgeUserSubID; int intEdgeID; IPoint ipFoundEdgePoint; double dblEdgePercent; /*PutEdgeOrigins 方法的第二个参数要求是 IEdgeFlag 类型的数
ipFeatureClass = ipFeatureClassContainer.get_Class (i);
ipFeatureLayer = new FeatureLayerClass(); ipFeatureLayer.FeatureClass = ipFeatureClass; m_ipMap.AddLayer( ipFeatureLayer); } } count = m_yerCount; ipMaxEnvelope = new EnvelopeClass(); for(int i =0;i<count;i++) { ipLayer = m_ipMap.get_Layer(i); ipFeatureLayer = ipLayer as IFeatureLayer; ipGeoDataset = ipFeatureLayer as IGeoDataset; ipEnvelope = ipGeoDataset.Extent; ipMaxEnvelope.Union( ipEnvelope); }
INetFlag ipNetFlag = new EdgeFlagClass()as INetFlag; IPoint ipEdgePoint = m_ipPoints.get_Point(i); //查找输入点的最近的边线 m_ipPointToEID.GetNearestEdge(ipEdgePoint, out intEdgeI D,out ipFoundEdgePoint, out dblEdgePercent); ipNetElements.QueryIDs( intEdgeID, esriElementType.esri ETEdge, out intEdgeUserClassID, out intEdgeUserID,out intEdgeUserS ubID); erClassID = intEdgeUserClassID; erID = intEdgeUserID; erSubID = intEdgeUserSubID; IEdgeFlag pTemp = (IEdgeFlag)(ipNetFlag as IEdgeFlag); pEdgeFlagList[i]=pTemp; } ipTraceFlowSolver.PutEdgeOrigins(ref pEdgeFlagList); INetSchema ipNetSchema = ipNetwork as INetSchema; INetWeight ipNetWeight = ipNetSchema.get_WeightByName(Wei
private IPolyline
m_ipPolyline;
#region Public Function
//返回和设置当前地图
public IMap SetOrGetMap
{
set{ m_ipMap = value;}
get{return
m_ipMap;}
}
//打开几何数据集的网络工作空间
public void OpenFeatureDatasetNetwork(IFeatureDataset Feature
INetSolver ipNetSolver = ipTraceFlowSolver as INetSolver; INetwork ipNetwork = m_work; ipNetSolver.SourceNetwork = ipNetwork; INetElements ipNetElements = ipNetwork as INetElements; int intCount = m_ipPoints.PointCount; //定义一个边线旗数组 IEdgeFlag[] pEdgeFlagList = new EdgeFlagClass[intCount]; for(int i = 0;i<intCount ;i++) {
ArcEngine 最短路径分析（源码）
using System; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Geodatabase; using workAnalysis;
ghtName);
INetSolverWeights ipNetSolverWeights =olverWeights;
ipNetSolverWeights.FromToEdgeWeight = ipNetWeight;//开始 边线的权重
ipNetSolverWeights.ToFromEdgeWeight = ipNetWeight;//终止 边线的权重
namespace GisEditor
{
/// <summary>
/// 最短路径分析
/// </summary>