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.