Represents the parent feature of a topological element.
A parent feature refers to a feature in the feature space from which one or more topological elements are created in the topology graph space.
public sealed class FeatureInfo
Public NotInheritable Class FeatureInfo
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.");
}
}
System.Object
ArcGIS.Core.Data.Topology.FeatureInfo
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.