ArcGIS Pro 3.1 API Reference Guide
ArcGIS.Core.Data.Topology Namespace / TopologyGraph Class / GetNodes Method / GetNodes() Method
Example

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    GetNodes() Method
    In This Topic
    Gets all the TopologyNodes that exist in the topology graph. This method must be called on the MCT. Use QueuedTask.Run.
    Syntax
    public IReadOnlyList<TopologyNode> GetNodes()
    Public Overloads Function GetNodes() As IReadOnlyList(Of TopologyNode)

    Return Value

    A list of all the TopologyNodes that exist in the topology graph.
    Exceptions
    ExceptionDescription
    A geodatabase-related exception has occurred.
    Example
    Build Map Topology
    private async Task BuildGraphWithActiveView()
    {
      await QueuedTask.Run(() =>
      {
        //Build the map topology graph
        MapView.Active.BuildMapTopologyGraph<TopologyDefinition>(async topologyGraph =>
        {
          //Getting the nodes and edges present in the graph
          var topologyGraphNodes = topologyGraph.GetNodes();
          var topologyGraphEdges = topologyGraph.GetEdges();
    
          foreach (var node in topologyGraphNodes)
          {
            // do something with the node
          }
          foreach (var edge in topologyGraphEdges)
          {
            // do something with the edge
          }
    
          MessageBox.Show($"Number of topo graph nodes are:  {topologyGraphNodes.Count}.\n Number of topo graph edges are {topologyGraphEdges.Count}.", "Map Topology Info");
        });
      });
    }
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3.0 or higher.
    See Also