ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Core.Data.Topology Namespace / FeatureInfo Class / FeatureClassName Property
Example

In This Topic
    FeatureClassName Property
    In This Topic
    The name of the feature class to which the parent feature belongs.
    Syntax
    public string FeatureClassName {get;}
    Public ReadOnly Property FeatureClassName As String
    Example
    ExploreTopologyGraph
    public void ExploreTopologyGraph()
    {
      using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(@"C:\TestData\GrandTeton.gdb"))))
      using (Topology topology = geodatabase.OpenDataset<Topology>("Backcountry_Topology"))
      {
        // Build a topology graph using the extent of the topology dataset.
    
        topology.BuildGraph(topology.GetExtent(), (topologyGraph) =>
        {
          using (Feature campsites12 = GetFeature(geodatabase, "Campsites", 12))
          {
            IReadOnlyList<TopologyNode> topologyNodesViaCampsites12 = topologyGraph.GetNodes(campsites12);
    
            TopologyNode topologyNodeViaCampsites12 = topologyNodesViaCampsites12[0];
    
            IReadOnlyList<TopologyEdge> allEdgesConnectedToNodeViaCampsites12 = topologyNodeViaCampsites12.GetEdges();
            IReadOnlyList<TopologyEdge> allEdgesConnectedToNodeViaCampsites12CounterClockwise = topologyNodeViaCampsites12.GetEdges(false);
    
            System.Diagnostics.Debug.Assert(allEdgesConnectedToNodeViaCampsites12.Count == allEdgesConnectedToNodeViaCampsites12CounterClockwise.Count);
    
            foreach (TopologyEdge edgeConnectedToNodeViaCampsites12 in allEdgesConnectedToNodeViaCampsites12)
            {
              TopologyNode fromNode = edgeConnectedToNodeViaCampsites12.GetFromNode();
              TopologyNode toNode = edgeConnectedToNodeViaCampsites12.GetToNode();
    
              bool fromNodeIsTheSameAsTopologyNodeViaCampsites12 = (fromNode == topologyNodeViaCampsites12);
              bool toNodeIsTheSameAsTopologyNodeViaCampsites12 = (toNode == topologyNodeViaCampsites12);
    
              System.Diagnostics.Debug.Assert(fromNodeIsTheSameAsTopologyNodeViaCampsites12 || toNodeIsTheSameAsTopologyNodeViaCampsites12,
                "The FromNode *or* ToNode of each edge connected to 'topologyNodeViaCampsites12' should be the same as 'topologyNodeViaCampsites12' itself.");
    
              IReadOnlyList<FeatureInfo> leftParentFeaturesBoundedByEdge = edgeConnectedToNodeViaCampsites12.GetLeftParentFeatures();
              foreach (FeatureInfo featureInfo in leftParentFeaturesBoundedByEdge)
              {
                System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(featureInfo.FeatureClassName));
                System.Diagnostics.Debug.Assert(featureInfo.ObjectID > 0);
                EnsureShapeIsNotEmpty(featureInfo);
              }
    
              IReadOnlyList<FeatureInfo> leftParentFeaturesNotBoundedByEdge = edgeConnectedToNodeViaCampsites12.GetLeftParentFeatures(false);
              foreach (FeatureInfo featureInfo in leftParentFeaturesNotBoundedByEdge)
              {
                System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(featureInfo.FeatureClassName));
                System.Diagnostics.Debug.Assert(featureInfo.ObjectID > 0);
                EnsureShapeIsNotEmpty(featureInfo);
              }
    
              IReadOnlyList<FeatureInfo> rightParentFeaturesBoundedByEdge = edgeConnectedToNodeViaCampsites12.GetRightParentFeatures();
              foreach (FeatureInfo featureInfo in rightParentFeaturesBoundedByEdge)
              {
                System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(featureInfo.FeatureClassName));
                System.Diagnostics.Debug.Assert(featureInfo.ObjectID > 0);
                EnsureShapeIsNotEmpty(featureInfo);
              }
    
              IReadOnlyList<FeatureInfo> rightParentFeaturesNotBoundedByEdge = edgeConnectedToNodeViaCampsites12.GetRightParentFeatures(false);
              foreach (FeatureInfo featureInfo in rightParentFeaturesNotBoundedByEdge)
              {
                System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(featureInfo.FeatureClassName));
                System.Diagnostics.Debug.Assert(featureInfo.ObjectID > 0);
                EnsureShapeIsNotEmpty(featureInfo);
              }
            }
          }
        });
      }
    }
    
    private void EnsureShapeIsNotEmpty(FeatureInfo featureInfo)
    {
      using (Feature feature = featureInfo.GetFeature())
      {
        System.Diagnostics.Debug.Assert(!feature.GetShape().IsEmpty, "The feature's shape should not be empty.");
      }
    }
    
    FindClosestElement
    public void FindClosestElement()
    {
      using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(@"C:\TestData\GrandTeton.gdb"))))
      using (Topology topology = geodatabase.OpenDataset<Topology>("Backcountry_Topology"))
      {
        // Build a topology graph using the extent of the topology dataset.
    
        topology.BuildGraph(topology.GetExtent(), (topologyGraph) =>
        {
          MapPoint queryPointViaCampsites12 = null;
    
          using (Feature campsites12 = GetFeature(geodatabase, "Campsites", 12))
          {
            queryPointViaCampsites12 = campsites12.GetShape() as MapPoint;
          }
    
          double searchRadius = 1.0;
    
          TopologyElement topologyElementViaCampsites12 = 
              topologyGraph.FindClosestElement<TopologyElement>(
                        queryPointViaCampsites12, searchRadius);
    
          System.Diagnostics.Debug.Assert(
            topologyElementViaCampsites12 != null, "There should be a topology element corresponding to 'queryPointViaCampsites12' within the 'searchRadius' units.");
    
          IReadOnlyList<FeatureInfo> parentFeatures = topologyElementViaCampsites12.GetParentFeatures();
    
          Console.WriteLine("The parent features that spawn 'topologyElementViaCampsites12' are:");
          foreach (FeatureInfo parentFeature in parentFeatures)
          {
            Console.WriteLine($"\t{parentFeature.FeatureClassName}; OID: {parentFeature.ObjectID}");
          }
    
          TopologyNode topologyNodeViaCampsites12 = topologyGraph.FindClosestElement<TopologyNode>(queryPointViaCampsites12, searchRadius);
    
          if (topologyNodeViaCampsites12 != null)
          {
            // There exists a TopologyNode nearest to the query point within searchRadius units.
          }
    
          TopologyEdge topologyEdgeViaCampsites12 = topologyGraph.FindClosestElement<TopologyEdge>(queryPointViaCampsites12, searchRadius);
    
          if (topologyEdgeViaCampsites12 != null)
          {
            // There exists a TopologyEdge nearest to the query point within searchRadius units.
          }
        });
      }
    }
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also