ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Data Namespace / RelationshipClassDefinition Class
Members Example

In This Topic
    RelationshipClassDefinition Class
    In This Topic
    Represents the schema and properties of a RelationshipClass.
    Syntax
    public class RelationshipClassDefinition : Definition, System.IDisposable  
    Public Class RelationshipClassDefinition 
       Inherits Definition
       Implements System.IDisposable 
    Example
    Obtaining Definition from Geodatabase
    public async Task ObtainingDefinitionFromGeodatabase()
    {
      await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
      {
        using (Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri("path\\to\\sde\\file\\sdefile.sde"))))
        {
          // Remember that for Enterprise databases you have to qualify your dataset names with the DatabaseName and UserName.
          TableDefinition enterpriseTableDefinition = geodatabase.GetDefinition<TableDefinition>("LocalGovernment.GDB.CitizenContactInfo");
    
          // It does not matter if the dataset is within a FeatureDataset or not.
          FeatureClassDefinition featureClassDefinition = geodatabase.GetDefinition<FeatureClassDefinition>("LocalGovernment.GDB.FireStation");
    
          // GetDefinition For a RelationshipClass.
          RelationshipClassDefinition relationshipClassDefinition = geodatabase.GetDefinition<RelationshipClassDefinition>("LocalGovernment.GDB.AddressPointHasSiteAddresses");
    
          // GetDefinition For a FeatureDataset.
          FeatureDatasetDefinition featureDatasetDefinition = geodatabase.GetDefinition<FeatureDatasetDefinition>("LocalGovernment.GDB.Address");
        }
      });
    }
    Obtaining List of Defintions from Geodatabase
    public async Task ObtainingDefinitionsFromGeodatabase()
    {
      await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
      {
        using (Geodatabase geodatabase = new Geodatabase(
          new DatabaseConnectionFile(new Uri("path\\to\\sde\\file\\sdefile.sde"))))
        {
          var enterpriseDefinitions = 
            geodatabase.GetDefinitions<FeatureClassDefinition>();
          IEnumerable<Definition> featureClassesHavingGlobalID = 
            enterpriseDefinitions.Where(definition => definition.HasGlobalID());
    
          var featureDatasetDefinitions = 
            geodatabase.GetDefinitions<FeatureDatasetDefinition>();
          bool electionRelatedFeatureDatasets = 
            featureDatasetDefinitions.Any(
              definition => definition.GetName().Contains("Election"));
    
          var attributedRelationshipClassDefinitions = 
            geodatabase.GetDefinitions<AttributedRelationshipClassDefinition>();
    
          var relationshipClassDefinitions = 
            geodatabase.GetDefinitions<RelationshipClassDefinition>();
        }
      });
    }
    Obtaining Related Definitions from Geodatabase
    public async Task ObtainingRelatedDefinitionsFromGeodatabase()
    {
      await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
      {
        using (Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri("path\\to\\sde\\file\\sdefile.sde"))))
        {
          // Remember the qualification of DatabaseName. for the RelationshipClass.
    
          RelationshipClassDefinition enterpriseDefinition = 
          geodatabase.GetDefinition<RelationshipClassDefinition>("LocalGovernment.GDB.AddressPointHasSiteAddresses");
          IReadOnlyList<Definition> enterpriseDefinitions = 
          geodatabase.GetRelatedDefinitions(enterpriseDefinition, DefinitionRelationshipType.DatasetsRelatedThrough);
          FeatureClassDefinition enterpriseAddressPointDefinition = 
          enterpriseDefinitions.First(
                  defn => defn.GetName().Equals("LocalGovernment.GDB.AddressPoint")) as FeatureClassDefinition;
    
          FeatureDatasetDefinition featureDatasetDefinition = 
            geodatabase.GetDefinition<FeatureDatasetDefinition>("LocalGovernment.GDB.Address");
          IReadOnlyList<Definition> datasetsInAddressDataset = 
            geodatabase.GetRelatedDefinitions(featureDatasetDefinition, DefinitionRelationshipType.DatasetInFeatureDataset);
          FeatureClassDefinition addressPointInAddressDataset = 
            datasetsInAddressDataset.First(
                  defn => defn.GetName().Equals("LocalGovernment.GDB.AddressPoint")) as FeatureClassDefinition;
    
          RelationshipClassDefinition addressPointHasSiteAddressInAddressDataset = datasetsInAddressDataset.First(
                  defn => defn.GetName().Equals("LocalGovernment.GDB.AddressPointHasSiteAddresses")) as RelationshipClassDefinition;
        }
      });
    }
    Obtaining related Feature Classes from a Relationship Class
    public async Task GetFeatureClassesInRelationshipClassAsync()
    {
      await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
      {
        using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(@"C:\Data\LocalGovernment.gdb"))))
        {
          IReadOnlyList<RelationshipClassDefinition> relationshipClassDefinitions = 
            geodatabase.GetDefinitions<RelationshipClassDefinition>();
    
          foreach (var relationshipClassDefinition in relationshipClassDefinitions)
          {
            IReadOnlyList<Definition> definitions = 
              geodatabase.GetRelatedDefinitions(relationshipClassDefinition,
                DefinitionRelationshipType.DatasetsRelatedThrough);
    
            foreach (var definition in definitions)
            {
              System.Diagnostics.Debug.WriteLine(
                $"Feature class in the RelationshipClass is:{definition.GetName()}");
            }
          }
        }
      });
    }
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.CoreObjectsBase
          ArcGIS.Core.Data.Definition
             ArcGIS.Core.Data.RelationshipClassDefinition
                ArcGIS.Core.Data.AttributedRelationshipClassDefinition

    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 8.1

    See Also