How to access source features referenced by a network dataset (ArcObjects .NET 10.5 SDK)

Summary

This topic describes how to access source features that are referenced as edges and junctions in a network dataset.

For more information on programming with the ArcGIS Network Analyst extension application programming interface (API), see the ArcGIS Network Analyst extension library overview topic.

This method uses a network dataset, an element identification (EID), and a type as shown in the following code. The EID represents the ID for a network element as referenced by the network dataset. The type represents the kind of source feature element.

To get the INetworkDataset interface, see How to open a network dataset.

[C#]

private ESRI.ArcGIS.Geodatabase.IFeature GetSourceFeature
    (ESRI.ArcGIS.Geodatabase.INetworkDataset networkDataset, int eid,
    ESRI.ArcGIS.Geodatabase.esriNetworkElementType elementType)
{
    // The element will be retrieved from the INetworkQuery interface on the network dataset.
    var netQuery=networkDataset as ESRI.ArcGIS.Geodatabase.INetworkQuery;

    // Create an empty element.
    ESRI.ArcGIS.Geodatabase.INetworkElement element=netQuery.CreateNetworkElement
        (elementType);

    // Populate the element base on the EID.
    switch (elementType)
    {
        case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETEdge:
            netQuery.QueryEdge(eid,
                ESRI.ArcGIS.Geodatabase.esriNetworkEdgeDirection.esriNEDAlongDigitized, element as ESRI.ArcGIS.Geodatabase.INetworkEdge2);
            break;
        case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETJunction:
            netQuery.QueryJunction(eid, element as
                ESRI.ArcGIS.Geodatabase.INetworkJunction);
            break;
        case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETTurn:
            netQuery.QueryTurn(eid, element as ESRI.ArcGIS.Geodatabase.INetworkTurn);
            break;
    }

    // Get the source ID and OID from the element.
    int sourceID=element.SourceID;
    int sourceOID=element.OID;

    // Get the network source using the source ID of the element.
    ESRI.ArcGIS.Geodatabase.INetworkSource netSource=networkDataset.get_SourceByID
        (sourceID);

    // Get the network source as a feature class.
    var fClassContainer=networkDataset as
        ESRI.ArcGIS.Geodatabase.IFeatureClassContainer;
    ESRI.ArcGIS.Geodatabase.IFeatureClass sourceFClass =
        fClassContainer.get_ClassByName(netSource.Name);

    // Finally, get the source feature from the source feature class.
    return sourceFClass.GetFeature(sourceOID);
}

[VB.NET]

Private Function GetSourceFeature(ByVal networkDataset As ESRI.ArcGIS.Geodatabase.INetworkDataset, ByVal eid As Integer, ByVal elementType As ESRI.ArcGIS.Geodatabase.esriNetworkElementType) As ESRI.ArcGIS.Geodatabase.IFeature
    ' The element will be retrieved from the INetworkQuery interface on the network dataset.
    Dim netQuery=TryCast(networkDataset, ESRI.ArcGIS.Geodatabase.INetworkQuery)
    
    ' Create an empty element.
    Dim element As ESRI.ArcGIS.Geodatabase.INetworkElement=netQuery.CreateNetworkElement(elementType)
    
    ' Populate the element base on the EID.
    Select Case elementType
        Case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETEdge
            netQuery.QueryEdge(eid, ESRI.ArcGIS.Geodatabase.esriNetworkEdgeDirection.esriNEDAlongDigitized, TryCast(element, ESRI.ArcGIS.Geodatabase.INetworkEdge2))
            Exit Select
        Case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETJunction
            netQuery.QueryJunction(eid, TryCast(element, ESRI.ArcGIS.Geodatabase.INetworkJunction))
            Exit Select
        Case ESRI.ArcGIS.Geodatabase.esriNetworkElementType.esriNETTurn
            netQuery.QueryTurn(eid, TryCast(element, ESRI.ArcGIS.Geodatabase.INetworkTurn))
            Exit Select
    End Select
    
    ' Get the source ID and OID from the element.
    Dim sourceID As Integer=element.SourceID
    Dim sourceOID As Integer=element.OID
    
    ' Get the network source using the source ID of the element.
    Dim netSource As ESRI.ArcGIS.Geodatabase.INetworkSource=networkDataset.get_SourceByID(sourceID)
    
    ' Get the network source as a feature class.
    Dim fClassContainer=TryCast(networkDataset, ESRI.ArcGIS.Geodatabase.IFeatureClassContainer)
    Dim sourceFClass As ESRI.ArcGIS.Geodatabase.IFeatureClass=fClassContainer.get_ClassByName(netSource.Name)
    
    ' Finally, get the source feature from the source feature class.
    Return sourceFClass.GetFeature(sourceOID)
End Function

Development licensing	Deployment licensing
Engine Developer Kit	Engine: Network Analyst
ArcGIS Desktop Advanced: Network Analyst	ArcGIS Desktop Advanced: Network Analyst
ArcGIS Desktop Standard: Network Analyst	ArcGIS Desktop Standard: Network Analyst
ArcGIS Desktop Basic: Network Analyst	ArcGIS Desktop Basic: Network Analyst

How to access source features referenced by a network dataset

See Also: