How to create a geodatabase network dataset

// Create a new empty data element for a buildable network dataset.

IDENetworkDataset deNetworkDataset = new DENetworkDatasetClass();

deNetworkDataset.Buildable = true;



// Open the feature dataset and cast to the IGeoDataset interface.

IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactory();

IWorkspace workspace = workspaceFactory.OpenFromFile(@

    "C:\Program Files\ArcGIS\DeveloperKit\SamplesNET\data\CreateNetworkDataset\Paris.gdb", 0);

IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;

IFeatureDataset featureDataset = featureWorkspace.OpenFeatureDataset("RoadNetwork");

IGeoDataset geoDataset = (IGeoDataset)featureDataset;



// Copy the feature dataset's extent and spatial reference to the network dataset data element.

IDEGeoDataset deGeoDataset = (IDEGeoDataset)deNetworkDataset;

deGeoDataset.Extent = geoDataset.Extent;

deGeoDataset.SpatialReference = geoDataset.SpatialReference;



// Specify the name of the network dataset.

IDataElement dataElement = (IDataElement)deNetworkDataset;

dataElement.Name = "ParisNet";

 

 

// Create a new EdgeFeatureSource object and point it to the Streets feature class.

INetworkSource edgeNetworkSource = new EdgeFeatureSourceClass();

edgeNetworkSource.Name = "Streets";

edgeNetworkSource.ElementType = esriNetworkElementType.esriNETEdge;



// Set the edge feature source's connectivity settings.

IEdgeFeatureSource edgeFeatureSource = (IEdgeFeatureSource)edgeNetworkSource;

edgeFeatureSource.UsesSubtypes = true;

edgeFeatureSource.set_SubtypeConnectivityGroup(1, 1);

edgeFeatureSource.set_SubtypeConnectivityPolicy(1,

    esriNetworkEdgeConnectivityPolicy.esriNECPEndVertex);

edgeFeatureSource.set_SubtypeConnectivityGroup(2, 1);

edgeFeatureSource.set_SubtypeConnectivityPolicy(2,

    esriNetworkEdgeConnectivityPolicy.esriNECPEndVertex);

edgeFeatureSource.set_SubtypeConnectivityGroup(3, 1);

edgeFeatureSource.set_SubtypeConnectivityPolicy(3,

    esriNetworkEdgeConnectivityPolicy.esriNECPAnyVertex);

 

// Create a StreetNameFields object and populate its settings.

IStreetNameFields streetNameFields = new StreetNameFieldsClass();

streetNameFields.Priority = 1; // Indicates the primary street name.

streetNameFields.StreetNameFieldName = "FULL_NAME";



// Add the StreetNameFields object to a new NetworkSourceDirections object,

// then add it to the EdgeFeatureSource created earlier.

INetworkSourceDirections nsDirections = new NetworkSourceDirectionsClass();

IArray nsdArray = new ArrayClass();

nsdArray.Add(streetNameFields);

nsDirections.StreetNameFields = nsdArray;

edgeNetworkSource.NetworkSourceDirections = nsDirections;

 

 

 

// Create a new EvaluatedNetworkAttribute object and populate its settings.

IEvaluatedNetworkAttribute minutesAttribute = new EvaluatedNetworkAttributeClass();

INetworkAttribute2 minutesNetworkAttribute2 = (INetworkAttribute2)minutesAttribute;

minutesNetworkAttribute2.Name = "Minutes";

minutesNetworkAttribute2.UsageType = esriNetworkAttributeUsageType.esriNAUTCost;

minutesNetworkAttribute2.DataType = esriNetworkAttributeDataType.esriNADTDouble;

minutesNetworkAttribute2.Units = esriNetworkAttributeUnits.esriNAUMinutes;

minutesNetworkAttribute2.UseByDefault = true;



// Create evaluator objects and set them on the EvaluatedNetworkAttribute object.

INetworkFieldEvaluator ftMinutesNetworkFieldEvaluator = new

    NetworkFieldEvaluatorClass();

INetworkEvaluator ftMinutesNetworkEvaluator = (INetworkEvaluator)

    ftMinutesNetworkFieldEvaluator;

ftMinutesNetworkFieldEvaluator.SetExpression("[FT_Minutes]", "");

minutesAttribute.set_Evaluator(edgeNetworkSource,

    esriNetworkEdgeDirection.esriNEDAlongDigitized, ftMinutesNetworkEvaluator);



INetworkFieldEvaluator tfMinutesNetworkFieldEvaluator = new

    NetworkFieldEvaluatorClass();

INetworkEvaluator tfMinutesNetworkEvaluator = (INetworkEvaluator)

    tfMinutesNetworkFieldEvaluator;

tfMinutesNetworkFieldEvaluator.SetExpression("[TF_Minutes]", "");

minutesAttribute.set_Evaluator(edgeNetworkSource,

    esriNetworkEdgeDirection.esriNEDAgainstDigitized, tfMinutesNetworkEvaluator);



INetworkConstantEvaluator minutesNetworkConstantEvaluator = new

    NetworkConstantEvaluatorClass();

INetworkEvaluator minutesConstantNetworkEvaluator = (INetworkEvaluator)

    minutesNetworkConstantEvaluator;

minutesNetworkConstantEvaluator.ConstantValue = 0;

minutesAttribute.set_DefaultEvaluator(esriNetworkElementType.esriNETEdge,

    minutesConstantNetworkEvaluator);

minutesAttribute.set_DefaultEvaluator(esriNetworkElementType.esriNETJunction,

    minutesConstantNetworkEvaluator);

minutesAttribute.set_DefaultEvaluator(esriNetworkElementType.esriNETTurn,

    minutesConstantNetworkEvaluator);



// Add the attribute to the array.

attributeArray.Add(minutesAttribute);