The following example shows how to get the name of the relationship classes that a particular feature class participates in. The example shows functionality that is specific to IObjectClass, but in this case it is used from the IFeatureClass interface, which inherits from IObjectClass.

[Visual Basic 6.0]
 ' create the workspace object and connect to the SDE server
  Dim pWorkspace As IWorkspace
  Dim pWorkspaceFactory As IWorkspaceFactory
  Dim pPropertySet As IPropertySet
  Set pPropertySet = New PropertySet
  
  Set pWorkspaceFactory = New SdeWorkspaceFactory
  With pPropertySet
    .SetProperty "server", "mickey"
    .SetProperty "instance", "5151"
    .SetProperty "user", "gdb"
    .SetProperty "password", "gdb"
    .SetProperty "version", "SDE.DEFAULT"
  End With
  
  Set pWorkspace = pWorkspaceFactory.Open(pPropertySet, 0)
  
  ' QI for IFeatureWorkspace
  Dim pFeatureWorkspace As IFeatureWorkspace
  Set pFeatureWorkspace = pWorkspace
  
  ' Open a feature class
  Dim pFeatureClass As IFeatureClass
  Set pFeatureClass = pFeatureWorkspace.OpenFeatureClass("gdb.Landmarks")
    
  ' Print the ObjectClass alias and object class ID
  Debug.Print pFeatureClass.AliasName
  Debug.Print pFeatureClass.ObjectClassID
  
  ' Find all of the relationship classes this object class
  ' participates in
  Dim pEnumRelationshipclass As IEnumRelationshipClass
  Set pEnumRelationshipclass = pFeatureClass.RelationshipClasses(esriRelRoleAny)
  
  Dim pRelationshipClass As IRelationshipClass
  Dim pDataset As IDataset
  Set pRelationshipClass = pEnumRelationshipclass.Next
  While Not pRelationshipClass Is Nothing
    ' QI for IDataset and print its name
    Set pDataset = pRelationshipClass
    Debug.Print pDataset.Name
    Set pRelationshipClass = pEnumRelationshipclass.Next
  Wend  

[C#]
    //IObjectClass Example
    public void IObjectClass_Example(IFeatureClass featureClass)
    {
        //This function shows how to get the name of the relationship classes that a 
        //particular feature class participates in. The example shows functionality that is 
        //specific to IObjectClass, but in this case it is used from the IFeatureClass interface,
        //which inherits from IObjectClass.
        //print the IOjectClass alias and object class ID
        Console.WriteLine("Alias of feature Class is: {0}", featureClass.AliasName);
        Console.WriteLine("ObjectClassID of feature class is: {1}", featureClass.ObjectClassID);
        //find all of the relationship classes this object class participates in
        IEnumRelationshipClass enumRelationshipClass = featureClass.get_RelationshipClasses(esriRelRole.esriRelRoleAny);
        IDataset dataset;
        IRelationshipClass relationshipClass = enumRelationshipClass.Next();
        while (relationshipClass != null)
        {
            //cast for IDataset and print its name
            dataset = (IDataset)relationshipClass;
            Console.WriteLine("The name of the relationship class is: {0}", dataset.Name);
            relationshipClass = enumRelationshipClass.Next();
        }
    }

[Visual Basic .NET, C++]
No example is available for Visual Basic .NET or C++. To view a Visual Basic 6.0 or C# example, click the Language Filter button in the upper-left corner of the page.