ArcObjects Library Reference (GeoDatabase)

IPlugInDatasetHelper2 Interface

Provides access to members that help Plug-In datasets.

Product Availability

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

Description

This interface allows a dataset helper to implement data source-level filtering of rows using a where clause.

Members

		Description
	Bounds	The extent of the dataset.
	ClassCount	The number of classes in the dataset.
	ClassIndex	The index of the named class.
	ClassName	The name of the indicated class.
	FetchAll	Gets all the records in the database.
	FetchByEnvelope	Gets the records within the envelope (or the full extent if the envelope is null).
	FetchByID	Gets a record by object id.
	FetchWithFilter	Gets the records according to the envelope, where clause or FIDSet.
	Fields	The field set of the indicated class.
	OIDFieldIndex	The index of the oid field in the field set of the indicated dataset.
	ShapeFieldIndex	The index of the shape field in the field set of the indicated dataset.

Inherited Interfaces

Interfaces	Description
IPlugInDatasetHelper	Provides access to members that help Plug-In datasets.

Remarks

This interface can be implemented to optimize queries if there is a way to filter results from the data source more efficiently than checking the attributes of each row one-by-one. For example, data sources that have indexes should implement this interface to take advantage of indexing.

Dataset helpers for data sources without an optimized method of querying (like indexing) do not need to implement this interface.