How to add point IDs to a polyline (ArcObjects .NET 10.4 SDK)

Adding point IDs to a polyline

The following code example makes an existing polyline point ID aware and defines ID values for each of its vertices:

[C#]

public void AddPointIDs(IFeatureClass featureClass)
{
    IFeatureCursor featureCursor=featureClass.Search(null, true);
    IFeature currentFeature=featureCursor.NextFeature();

    while (currentFeature != null)
    {
        IPointIDAware pointIDAware=currentFeature.Shape as IPointIDAware;
        pointIDAware.PointIDAware=true;

        //The polyline is now point ID aware. It will persist its point IDs the next time it is saved.
        ISegmentCollection segmentCollection=pointIDAware as ISegmentCollection;
        IEnumSegment segmentEnumeration=segmentCollection.EnumSegments;

        ISegment currentSegment;
        int partIndex=0;
        int segmentIndex=0;
        segmentEnumeration.Next(out currentSegment, ref partIndex, ref segmentIndex);

        while (currentSegment != null)
        {
            ISegmentID segmentID=currentSegment as ISegmentID;
            segmentID.SetIDs(segmentIndex, segmentIndex + 1);
            segmentEnumeration.Next(out currentSegment, ref partIndex, ref
                segmentIndex);
        }

        currentFeature.Shape=pointIDAware as IGeometry;
        currentFeature.Store();

        currentFeature=featureCursor.NextFeature();
    }
}

[VB.NET]

Private Sub AddPointIds(ByVal featureClass As IFeatureClass)
    Dim featureCursor As IFeatureCursor=featureClass.Search(Nothing, False)
    Dim currentFeature As IFeature=featureCursor.NextFeature()
    While Not currentFeature Is Nothing
        Dim pointIDAware As IPointIDAware=CType(currentFeature.Shape, IPointIDAware)
        pointIDAware.PointIDAware=True
        'The polyline is now point ID aware.
        ' It will persist its point IDs the next time it is saved.
        Dim segmentCollection As ISegmentCollection=CType(pointIDAware, ISegmentCollection)
        Dim segmentEnumeration As IEnumSegment=segmentCollection.EnumSegments
        Dim currentSegment As ISegment
        Dim partIndex As Integer=0
        Dim segmentIndex As Integer=0
        'Warning about the current segment being passed by reference, and that it can result
        'in a null reference exception at run time. No out keyword in VB .NET.
        
        segmentEnumeration.Next(currentSegment, partIndex, segmentIndex)
        
        While Not currentSegment Is Nothing
            Dim segmentID As ISegmentID=currentSegment
            segmentID.SetIDs(segmentIndex, segmentIndex + 1)
            segmentEnumeration.Next(currentSegment, partIndex, segmentIndex)
        End While
        currentFeature.Shape=pointIDAware
        currentFeature.Store()
        currentFeature=featureCursor.NextFeature()
    End While
End Sub

To use the code in this topic, reference the following assemblies in your Visual Studio project. In the code files, you will need using (C#) or Imports (VB .NET) directives for the corresponding namespaces (given in parenthesis below if different from the assembly name):

ESRI.ArcGIS.Geometry

Development licensing	Deployment licensing
ArcGIS for Desktop Basic	ArcGIS for Desktop Basic
ArcGIS for Desktop Standard	ArcGIS for Desktop Standard
ArcGIS for Desktop Advanced	ArcGIS for Desktop Advanced
Engine Developer Kit	Engine