Provides a means of reading one or more forward-only streams of result sets obtained by executing a command at a data source, and is implemented by Reporting Services Data Processing Extensions that access relational databases.
Assembly: Microsoft.ReportingServices.Interfaces (in Microsoft.ReportingServices.Interfaces.dll)
The interface enables you to implement a DataReader class, which provides a means of reading one or more forward-only streams of result sets. For more information about DataReader classes, see Implementing a DataReader Class for a Data Processing Extension.
An application does not create an instance of the interface directly, but creates an instance of a class that implements .
Classes that implement must also implement the required members, and typically define additional members to add provider-specific functionality.
Changes made to a result set by another process or thread while data is being read may be visible to the user of a class that implements an . However, the precise behavior is both provider and timing dependent.
Users do not create an instance of a DataReader class directly. Instead, they obtain the DataReader through the ExecuteReader method of the Command object. Therefore, you should mark DataReader constructors as internal.