FromKnowledgeGraph(Uri,KnowledgeGraphFilterType) Method

In This Topic

Creates a KnowledgeGraphLayerIDSet with a particular filter type. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public static KnowledgeGraphLayerIDSet FromKnowledgeGraph( 
   Uri knowledgeGraphServiceUri,
   KnowledgeGraphFilterType filterType
)

Public Overloads Shared Function FromKnowledgeGraph( _
   ByVal knowledgeGraphServiceUri As Uri, _
   ByVal filterType As KnowledgeGraphFilterType _
) As KnowledgeGraphLayerIDSet

Parameters

knowledgeGraphServiceUri: A Uri link to a knowledge graph service.
filterType: The type of named type objects to include in the filter set.

Return Value

A KnowledgeGraphLayerIDSet.

Exceptions

Exception	Description
System.ArgumentNullException	The knowledgeGraphServiceUri is null.
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.

Example

Create a Link Chart Containing All Records for a KG

QueuedTask.Run(() =>
{
  //Create the link chart and show it
  //build the IDSet using KnowledgeGraphFilterType.AllNamedObjects
  var idSet = KnowledgeGraphLayerIDSet.FromKnowledgeGraph(
    kg, KnowledgeGraphFilterType.AllNamedObjects);
  var linkChart = MapFactory.Instance.CreateLinkChart(
                    "KG Link Chart", kg, idSet);
  FrameworkApplication.Panes.CreateMapPaneAsync(linkChart);
});

Create a link chart with all the entities of the Knowledge Graph

string url =
        @"https://acme.server.com/server/rest/services/Hosted/AcmeKnowledgeGraph/KnowledgeGraphServer";

QueuedTask.Run(() =>
{
  using (var kg = new KnowledgeGraph(new KnowledgeGraphConnectionProperties(new Uri(url))))
  {
    var idSet = KnowledgeGraphLayerIDSet.FromKnowledgeGraph(
      kg, KnowledgeGraphFilterType.AllEntities);
    var newLinkChart = MapFactory.Instance.CreateLinkChart(
      "All_Entities link chart", kg, idSet);
  };
});

Create a link chart based on a template link chart

// note that the template link chart MUST use the same KG server

string url =
        @"https://acme.server.com/server/rest/services/Hosted/AcmeKnowledgeGraph/KnowledgeGraphServer";

QueuedTask.Run(() =>
{
  // find the existing link chart by name
  var projectItem = Project.Current.GetItems<MapProjectItem>()
  .FirstOrDefault(pi => pi.Name == "Acme Link Chart");
  var linkChartMap = projectItem?.GetMap();
  if (linkChartMap == null)
    return;

  //Create a connection properties
  var kg_props =
      new KnowledgeGraphConnectionProperties(new Uri(url));
  try
  {
    //Open a connection
    using (var kg = new KnowledgeGraph(kg_props))
    {
      //Add all entities to the link chart
      var idSet = KnowledgeGraphLayerIDSet.FromKnowledgeGraph(
            kg, KnowledgeGraphFilterType.AllEntities);
      //Create the new link chart and show it
      var newLinkChart = MapFactory.Instance.CreateLinkChart(
                        "KG from Template", kg, idSet, linkChartMap.URI);
      FrameworkApplication.Panes.CreateMapPaneAsync(newLinkChart);
    }
  }
  catch (Exception ex)
  {
    System.Diagnostics.Debug.WriteLine(ex.ToString());
  }
});

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.3 or higher.

Reference

KnowledgeGraphLayerIDSet Class
KnowledgeGraphLayerIDSet Members
Overload List

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