arcEngine 路径规划
//作者 疯狂的乌龟
//2015-5-26
//arcEngine 10.1
//功能：路径规划
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.NetworkAnalyst;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
namespace NetworkPlan
{
public class Canylist
{
private INAContext M_NAContext;
private IFeatureClass PointFeatureClass;
private IFeatureWorkspace NetworkFeatureWorkspace;
INetworkDataset networkDataset;
/// <param name=”gdbFilePath”>路网所在的工作空间路径</param>
/// <param name=”featureDatasetName”>网络数据集名称</param>
/// <param name=”networkLayerName”>路网图层名称</param>
public CNetworkanylist(string gdbFilePath, string featureDatasetName,string networkLayerName,string pointLayerName)
{
this.NetworkFeatureWorkspace = this.OpenGdbWorkspace(gdbFilePath) as IFeatureWorkspace;
this.PointFeatureClass = this.NetworkFeatureWorkspace.OpenFeatureClass(pointLayerName);
this.networkDataset = this.OpenNetworkDataset(networkLayerName, featureDatasetName);
this.CreateNaContext(networkDataset);
}
public INALayer GetRouteLayer()
{
INALayer pNaLayer = null;
if (LoadLocation())
{
IGPMessages gpMessages = new GPMessagesClass();
try
{
//路网分析
pNaLayer = M_NAContext.Solver.CreateLayer(M_NAContext);
M_NAContext.Solver.Solve(M_NAContext, gpMessages, new TrackCancelClass());
}
catch (Exception exp)
{
System.Diagnostics.Debug.WriteLine(“GetRouteLayer方法出错 ” + exp.Message);
return null;
}
}
return pNaLayer;
}
public IPolyline GetRouteLine()
{
IPolyline pline = null;
ILayer Ly1 = GetRouteLayer() as ILayer;
if (Ly1 is IGroupLayer || Ly1 is ICompositeLayer)
{
ICompositeLayer Igrouplayer = (ICompositeLayer)Ly1;
for (int j = 0; j < Igrouplayer.Count; j++)
{
ILayer ly = Igrouplayer.get_Layer(j);
if (ly.Name.Equals(“Routes”))
{
ShpEngine shpHelper = new ShpEngine((ly as IFeatureLayer).FeatureClass);
List<IFeature> feaList = shpHelper.FeatureList;
if (null != feaList && feaList.Count > 0)
{
pline = feaList[0].Shape as IPolyline;
}
}
}
}
return pline;
}
/// <summary>
/// 创建网络分析上下文
/// </summary>
/// <param name=”networkDataset”></param>
void CreateNaContext(INetworkDataset networkDataset)
{
if (networkDataset == null) return;
IDENetworkDataset deNDS = (networkDataset as IDatasetComponent).DataElement as IDENetworkDataset;
INASolver naSolver = new NARouteSolverClass();
M_NAContext = naSolver.CreateContext(deNDS, naSolver.Name);
((INAContextEdit)M_NAContext).Bind(networkDataset, new GPMessagesClass());
}
/// <summary>
/// 装载网络分析类
/// </summary>
/// <param name=”featureWorkspace”></param>
/// <returns></returns>
bool LoadLocation()
{
try
{
INamedSet pNamedSet = M_NAContext.NAClasses;
INAClass pNAClass = pNamedSet.get_ItemByName(“Stops”) as INAClass;
INAClassLoader2 pNAClassLoader = new NAClassLoaderClass();
INALocator3 locator = M_NAContext.Locator as INALocator3;
locator.ExcludeRestrictedElements = true;
locator.CacheRestrictedElements(M_NAContext);
INAClassFieldMap naClassFieldMap = new NAClassFieldMapClass();
naClassFieldMap.CreateMapping(pNAClass.ClassDefinition, PointFeatureClass.Fields);
pNAClassLoader.FieldMap = naClassFieldMap;
pNAClassLoader.Locator = locator;
pNAClassLoader.NAClass = pNAClass;
int rowsIn = 0;
int rowsLocated = 0;
ICursor pCursor = PointFeatureClass.Search(null, true) as ICursor;
pNAClassLoader.Load(pCursor, null, ref rowsIn, ref rowsLocated);
}
catch(Exception exp)
{
System.Diagnostics.Debug.WriteLine(“LoadLocation方法出错 ” + exp.Message);
return false;
}
return true;
}
/// <summary>
/// 打开GDB工作空间
/// </summary>
/// <param name=”gdbFileName”></param>
/// <returns></returns>
IWorkspace OpenGdbWorkspace(string gdbFileName)
{
IWorkspaceFactory wf = new FileGDBWorkspaceFactoryClass();
if (!System.IO.Directory.Exists(gdbFileName))
{
System.Diagnostics.Debug.WriteLine(“LoadLocation方法出错 ” + “文件数据库: ” + gdbFileName + ” 不存在,请检查配置文件”);
return null;
}
IWorkspace workspace = null;
try
{
workspace = wf.OpenFromFile(gdbFileName, 0);
}
catch (Exception exp)
{
System.Diagnostics.Debug.WriteLine(“OpenGdbWorkspace方法出错 ” + exp.Message);
}
finally
{
wf = null;
}
return workspace;
}
/// <summary>
/// 打开网络数据集
/// </summary>
/// <param name=”networkName”>路网图层名称</param>
/// <param name=”networkDatasetName”>网络数据集名称</param>
/// <returns></returns>
INetworkDataset OpenNetworkDataset(string networkName, string featureDatasetName)
{
try
{
IFeatureDataset featureDataset = this.NetworkFeatureWorkspace.OpenFeatureDataset(featureDatasetName);
IFeatureDatasetExtensionContainer featureDatasetExtensionContainer = featureDataset as IFeatureDatasetExtensionContainer;
IFeatureDatasetExtension featureDatasetExtension = featureDatasetExtensionContainer.FindExtension(esriDatasetType.esriDTNetworkDataset);
IDatasetContainer3 datasetContainer3 = featureDatasetExtension as ESRI.ArcGIS.Geodatabase.IDatasetContainer3;
IDataset dataset = datasetContainer3.get_DatasetByName(esriDatasetType.esriDTNetworkDataset, networkName);
return dataset as INetworkDataset;
}
catch (Exception exp)
{
System.Diagnostics.Debug.WriteLine(“OpenNetworkDataset方法出错 ” + exp.Message);
return null;
}
}
}
}
转载自：https://blog.csdn.net/herogui/article/details/46004625
