ArcObjects Library Reference (Carto)

NetworkLayer CoClass

Esri Network Layer CoClass.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Interfaces

Interfaces	Description
IConnectionPointContainer	Supports connection points for connectable objects.
IDataLayer	Provides access to members that control the data source properties of a layer.
IDataLayer2	Provides access to additional members that control the data source properties of a layer.
IDataset (esriGeoDatabase)	Provides access to members that supply dataset information.
IDisplayAdmin (esriDisplay)	Provides access to members that control display administration.
IDisplayFilterManager (esriDisplay)	Provides access to members that control display filter management.
IGeoDataset (esriGeoDatabase)	Provides access to members that provide information about a Geographic Dataset.
IIdentify	Provides access to members that identify features.
IIdentify2	Provides access to members that set the current scale of the display.
ILayer	Provides access to members that work with all layers.
ILayer2	Provides access to additional members that work with all layers.
ILayerDrawingProperties	Provides access to members that control layer drawing properties.
ILayerEffects	Provides access to members that control layer effects.
ILayerExtensions	Provides access to the extensions of a layer.
ILayerGeneralProperties	Provides access to layer general properties.
ILayerInfo	Provides access to members that return layer images.
ILayerPosition	Provides access to members that control a layer's default position in the map interface.
ILegendInfo	Provides access to members that control legend information provided by a renderer.
IMapLevel (esriDisplay)	Provides access to members that control the map level.
INetworkLayer	Provides access to members that control a network layer.
INetworkRendererCollection	Provides access to members that manage the collection of network renderers.
IPersistStream (esriSystem)
IPropertySupport (esriSystem)	Provides access to members that set a default property on an object.
IPublishLayer	Provides access to a layer's capability for being published with the ArcGIS Publisher extension.
ITimeData	Provides access to time related properties of a layer.
ITimeData2	Provides access to time related properties of a layer.
ITimeDataCustomUI	Provides access to interface that indicates if a layer has a associated UI of its own.
ITimeDataDisplay	Provides access to time animation related properties of a layer.

Event Interfaces

Interfaces	Description
ILayerEvents (default)	Provides access to events that occur when layer visibility changes.

Remarks

The NetworkLayer is a type of Layer in the Map that holds a reference to a NetworkDataset. You can open its network dataset by calling INetworkLayer::NetworkDataset.

[C#]

The following code shows how to open a shapefile network dataset, then add it to a Map using a NetworkLayer:

void AddNetworkLayer(string shapefilePath, string networkDatasetName, IMap map)
{
  IWorkspaceFactory workspaceFactory=new ShapefileWorkspaceFactoryClass() as IWorkspaceFactory;

  IWorkspace workspace=workspaceFactory.OpenFromFile(sShapefilePath, 0);
  IWorkspaceExtensionManager wsExtMgr=workspace as IWorkspaceExtensionManager;
  UID myUID=New UIDClass();
  myUID.Value="esriGeoDatabase.NetworkDatasetWorkspaceExtension";
  IWorkspaceExtension wsExt=wsExtMgr.FindExtension(myUID);
  IDatasetContainer2 dsCont=wsExt as IDatasetContainer2;
  IDataset dataset=dsCont.DatasetByName(esriDTNetworkDataset, networkDatasetName)
  INetworkDataset networkDataset=dataset as INetworkDataset;
  INetworkLayer networkLayer=New NetworkLayerClass();
  networkLayer.NetworkDataset=networkDataset;
  map.AddLayer(networkLayer);
}

[Visual Basic .NET]

The following code shows how to open a shapefile network dataset, then add it to a Map using a NetworkLayer:

Sub AddNetworkLayer(shapefilePath As String, networkDatasetName As String, map As IMap)
  Dim workspaceFactory As IWorkspaceFactory=New ShapefileWorkspaceFactory

  Dim workspace As IWorkspace=workspaceFactory.OpenFromFile(sShapefilePath, 0)
  Dim wsExtMgr As IWorkspaceExtensionManager=CType(workspace, IWorkspaceExtensionManager)
  Dim myUID As New UID
  myUID.Value="esriGeoDatabase.NetworkDatasetWorkspaceExtension"
  Dim wsExt As IWorkspaceExtension=wsExtMgr.FindExtension(myUID)
  Dim dsCont As IDatasetContainer2=CType(wsExt, IDatasetContainer2)
  Dim dataset As IDataset=dsCont.DatasetByName(esriDTNetworkDataset, networkDatasetName)
  Dim networkDataset As INetworkDataset=CType(dataset, INetworkDataset)
  Dim networkLayer As INetworkLayer=New NetworkLayer
  networkLayer.NetworkDataset=networkDataset
  map.AddLayer(networkLayer)
End Sub

Working with Events

[Visual Basic 6.0]

When working with NetworkLayer's default outbound interface in Visual Basic 6 declare variables as follows:

Private WithEvents pNetworkLayer as NetworkLayer