ArcObjects Library Reference (GeoDatabase)

IObjectClass Interface

Provides access to members that return information about an object class.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

When To Use

The IObjectClass interface is the main interface used to get the properties of an object class in a geodatabase. An object class is a feature class or table that has been registered with the geodatabase. For example, you can use the IObjectClass interface to get a list of all the relationship classes in which an object class participates.

Members

		Description
	AddField	Adds a field to this object class.
	AddIndex	Adds an index to this object class.
	AliasName	The alias name of the object class.
	CLSID	The GUID for the COM Class (CoClass) corresponding to instances of this object class.
	DeleteField	Deletes a field from this object class.
	DeleteIndex	Deletes an index from this object class.
	EXTCLSID	The GUID for the COM Class (CoClass) corresponding to the class extension for this object class.
	Extension	The extension for this object class.
	ExtensionProperties	The extension properties for this object class.
	Fields	The fields collection for this object class.
	FindField	The index of the field with the specified name.
	HasOID	Indicates if the class has an object identity (OID) field.
	Indexes	The indexes collection for this object class.
	ObjectClassID	The unique ID for the object class.
	OIDFieldName	The name of the field corresponding to the OID.
	RelationshipClasses	The relationship classes in which this object class participates in for the specified role.

Inherited Interfaces

Interfaces	Description
IClass	Provides access to members that return information about and manage the class.

CoClasses that implement IObjectClass

CoClasses and Classes	Description
FeatureClass	ESRI Feature Class object.
NAClass (esriNetworkAnalyst)	Holds features used as input and generated as output during network analysis.
ObjectClass	ESRI Object Class object.
RasterBand (esriDataSourcesRaster)	A representation of a single band of a raster dataset on disk.
RasterCatalog	A collection of raster datasets in a Geodatabase table.
RasterLayer (esriCarto)	Raster layer source and display options.
RelQueryTable	An object that joins two datasets based on common data values.
RouteEventSource (esriLocation)	Route event source object.
SchematicDiagramClass (esriSchematic)	Schematic diagram class object.
SchematicElementClass (esriSchematic)	Schematic element class object.
SchematicInMemoryFeatureClass (esriSchematic)	Schematic in memory feature class object.
TemporalFeatureClass (esriTrackingAnalyst)	Controls settings for the temporal feature class.
TemporalRecordSet (esriTrackingAnalyst)	Defines the COM coclass for the TemporalRecordSet COM object.
XYEventSource	XY event source object.

Remarks

All object classes support the IObjectClass interface and this interface inherits from the IClass interface. The CLSID, EXTCLSID, and Extension for an ObjectClass may be obtained via the corresponding methods inherited from IClass.

For programming convenience, pre-existing tables in the host RDBMS also support the IObjectClass interface even if they have not been registered with the Geodatabase. Such tables can be distinguished from registered object classes because they return an ObjectClassID of -1 and return False to the HasOID method. New object classes in a Geodatabase that are created using the CreateTable method on the IFeatureWorkspace interface are automatically registered with the Geodatabase and assigned an object class ID.

If no AliasName has been defined for an object class, then the AliasName is equal to the Name.

.NET Samples

Curve conversion add-in (Code Files: CurveConversionDockWin) | Implementing a schematic layout algorithm and its layout property page (Code Files: TranslateTree) | Tabbed feature inspector (Code Files: AddEXTCLSID) | Timestamper class extension (Code Files: TimestampPropertyPage) |

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