Extending Reporting Services - Professional SQL Server 2005 Reporting Services - page 543

Figure 13-3

You may build a minimalist DataExtension by implementing the required interfaces shown in the
following table and add additional behavior by implementing the optional interfaces.

Required Interfaces Description

IDbConnection Unique session with a data source.

IDbCommand Represents query command methods to be executed against

a data source.

IDataParameter Methods to support passing parameters to a Command

object.

IDataParameterCollection Collection of parameters.

IDataReader Methods used to read a forward-only read-only data stream.

IExtension Reporting Services specific Interface that supports localization

and is implemented by all SSRS extensions.

Optional Interfaces Description

IDataReaderExtension Used to provide Resultset-specific aggregation information.

IDbCommandAnalysis Analysis Services-specific extension.

IDbConnectionExtension Unique session with a data source.

IDbTransaction Local transaction (nondistributed).

IDbTransactionExtension Reporting Services-specific interface that supports localization

and is implemented by all SRS extensions.