ArcObjects Library Reference  (GeoDatabase)    

IFeatureClass Interface

Provides access to members that control the behavior and properties of a feature class.

Product Availability

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

When To Use

The IFeatureClass interface is the main interface for getting and setting properties of a feature class. For example, use the IFeatureClass interface to get the type of feature class, get a count of features that satisfy some query, or create a new feature in the feature class. The IFeatureClass interface inherits from the IObjectClass interface.

Members

Description
Method AddField Adds a field to this object class.
Method AddIndex Adds an index to this object class.
Read-only property AliasName The alias name of the object class.
Read-only property AreaField The geometry area field.
Read-only property CLSID The GUID for the COM Class (CoClass) corresponding to instances of this object class.
Method CreateFeature Create a new feature, with a system assigned object ID and null property values.
Method CreateFeatureBuffer Create a feature buffer that can be used with an insert cursor.
Method DeleteField Deletes a field from this object class.
Method DeleteIndex Deletes an index from this object class.
Read-only property EXTCLSID The GUID for the COM Class (CoClass) corresponding to the class extension for this object class.
Read-only property Extension The extension for this object class.
Read-only property ExtensionProperties The extension properties for this object class.
Read-only property FeatureClassID The unique ID for the Feature Class.
Method FeatureCount The number of features selected by the specified query.
Read-only property FeatureDataset The feature dataset that contains the feature class.
Read-only property FeatureType The type of features in this feature class.
Read-only property Fields The fields collection for this object class.
Method FindField The index of the field with the specified name.
Method GetFeature Get the feature with the specified object ID.
Method GetFeatures Get a cursor of Rows given a set of object ids.
Read-only property HasOID Indicates if the class has an object identity (OID) field.
Read-only property Indexes The indexes collection for this object class.
Method Insert Returns a cursor that can be used to insert new features.
Read-only property LengthField The geometry length field.
Read-only property ObjectClassID The unique ID for the object class.
Read-only property OIDFieldName The name of the field corresponding to the OID.
Read-only property RelationshipClasses The relationship classes in which this object class participates in for the specified role.
Method Search Returns an object cursor that can be used to fetch feature objects selected by the specified query.
Method Select Returns a selection That contains the object ids selected by the specified query.
Read-only property ShapeFieldName The name of the default sShape field.
Read-only property ShapeType The type of the default Shape for the features in this feature class.
Method Update Returns a cursor that can be used to update features selected by the specified query.

Inherited Interfaces

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

CoClasses that implement IFeatureClass

CoClasses and Classes Description
FeatureClass ESRI Feature Class object.
NAClass (esriNetworkAnalyst) Holds features used as input and generated as output during network analysis.
RasterCatalog A collection of raster datasets in a Geodatabase table.
RelQueryTable An object that joins two datasets based on common data values.
RouteEventSource (esriLocation) Route event source object.
TemporalFeatureClass (esriTrackingAnalyst) Controls settings for the temporal feature class.
XYEventSource XY event source object.

Remarks

Feature classes can be created using the IFeatureWorkspace.CreateFeatureClass and IFeatureDataset.CreateFeatureClass methods.

[Visual Basic 6.0]

The following two examples are code excerpts that show how to get a reference to an IFeatureClass in two different ways.

You can use the table of contents in ArcMap to get at the featureclass.

 Dim pFeatcls As IFeatureClass

Dim pFeatLayer As IFeatureLayer
Dim pDoc As IMxDocument
Dim pMap As IMap

Set pDoc = ThisDocument
Set pMap = pDoc.Maps.Item(0)
Set pFeatLayer = pMap.Layer(0)
Set pFeatcls = pFeatLayer.FeatureClass

Alternatively, you could use code to get the workspace object that contains the feature class, then get the feature class from there. This example has the location of the Access workspace hard-coded, but can be changed to point to any geodatabase.

 Dim pFact As IWorkspaceFactory

Set pFact = New AccessWorkspaceFactory

Dim pWorkspace As IWorkspace
Set pWorkspace = pFact.OpenFromFile("C:\data\usa.mdb", 0)

Dim pFeatws As IFeatureWorkspace
Set pFeatws = pWorkspace

Dim pFeatcls As IFeatureClass
Set pFeatcls = pFeatws.OpenFeatureClass("states")

See Also

IClass Interface | IObjectClass Interface | INetworkClass Interface

Example

IFeatureClass Example