/// <summary>
/// Create the analysis layer, load the locations, solve the analysis, and write to disk
/// </summary>
public void SolveRoute()
{
// Open the feature workspace, input feature class, and network dataset
// As Workspace Factories are Singleton objects, they must be instantiated with the Activator
IWorkspaceFactory workspaceFactory = System.Activator.CreateInstance(System.Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory")) as IWorkspaceFactory;
IFeatureWorkspace featureWorkspace = workspaceFactory.OpenFromFile(Application.StartupPath + FGDB_WORKSPACE, 0) as IFeatureWorkspace;
IFeatureClass inputStopsFClass = featureWorkspace.OpenFeatureClass(INPUT_STOPS_FC);
// Obtain the dataset container from the workspace
ESRI.ArcGIS.Geodatabase.IFeatureDataset featureDataset = featureWorkspace.OpenFeatureDataset(FEATURE_DATASET);
var featureDatasetExtensionContainer = featureDataset as ESRI.ArcGIS.Geodatabase.IFeatureDatasetExtensionContainer;
ESRI.ArcGIS.Geodatabase.IFeatureDatasetExtension featureDatasetExtension = featureDatasetExtensionContainer.FindExtension(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTNetworkDataset);
var datasetContainer3 = featureDatasetExtension as ESRI.ArcGIS.Geodatabase.IDatasetContainer3;
// Use the container to open the network dataset.
ESRI.ArcGIS.Geodatabase.IDataset dataset = datasetContainer3.get_DatasetByName(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTNetworkDataset, NETWORK_DATASET);
INetworkDataset networkDataset = dataset as INetworkDataset;
// Create the Route NALayer
INALayer naLayer = CreateRouteAnalysisLayer("Route", networkDataset);
INAContext naContext = naLayer.Context;
INAClass stopsNAClass = naContext.NAClasses.get_ItemByName("Stops") as INAClass;
IFeatureClass routesFC = naContext.NAClasses.get_ItemByName("Routes") as IFeatureClass;
// Load the Stops
INAClassFieldMap naClassFieldMap = new NAClassFieldMapClass();
naClassFieldMap.set_MappedField("Name", INPUT_NAME_FIELD);
INAClassLoader naLoader = new NAClassLoaderClass();
naLoader.Locator = naContext.Locator;
naLoader.NAClass = stopsNAClass;
naLoader.FieldMap = naClassFieldMap;
// Avoid loading network locations onto non-traversable portions of elements
INALocator3 locator = naContext.Locator as INALocator3;
locator.ExcludeRestrictedElements = true;
locator.CacheRestrictedElements(naContext);
int rowsInCursor = 0;
int rowsLocated = 0;
naLoader.Load(inputStopsFClass.Search(new QueryFilterClass(), false) as ICursor, new CancelTrackerClass(), ref rowsInCursor, ref rowsLocated);
//Message all of the network analysis agents that the analysis context has changed
((INAContextEdit)naContext).ContextChanged();
//Solve
INASolver naSolver = naContext.Solver;
naSolver.Solve(naContext, new GPMessagesClass(), new CancelTrackerClass());
//Save the layer to disk
SaveLayerToDisk(naLayer as ILayer, System.Environment.CurrentDirectory + @"\Route.lyr");
}
/// <summary>
/// Geodatabase function: open network dataset
/// </summary>
/// <param name="workspace">Input workspace</param>
/// <param name="strNDSName">Input network dataset name</param>
/// <returns>NetworkDataset</returns>
public INetworkDataset OpenNetworkDataset(IWorkspace workspace, string featureDatasetName, string strNDSName)
{
// Obtain the dataset container from the workspace
var featureWorkspace = workspace as IFeatureWorkspace;
ESRI.ArcGIS.Geodatabase.IFeatureDataset featureDataset = featureWorkspace.OpenFeatureDataset(featureDatasetName);
var featureDatasetExtensionContainer = featureDataset as ESRI.ArcGIS.Geodatabase.IFeatureDatasetExtensionContainer;
ESRI.ArcGIS.Geodatabase.IFeatureDatasetExtension featureDatasetExtension = featureDatasetExtensionContainer.FindExtension(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTNetworkDataset);
var datasetContainer3 = featureDatasetExtension as ESRI.ArcGIS.Geodatabase.IDatasetContainer3;
// Use the container to open the network dataset.
ESRI.ArcGIS.Geodatabase.IDataset dataset = datasetContainer3.get_DatasetByName(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTNetworkDataset, strNDSName);
return dataset as ESRI.ArcGIS.Geodatabase.INetworkDataset;
}
