IDataReader Interface

Artikkeli
12/03/2008

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.

Namespace: Microsoft.ReportingServices.DataProcessing
Assembly: Microsoft.ReportingServices.Interfaces (in microsoft.reportingservices.interfaces.dll)

Syntax

'Declaration
Public Interface IDataReader
    Inherits IDisposable

public interface IDataReader : IDisposable

public interface class IDataReader : IDisposable

public interface IDataReader extends IDisposable

public interface IDataReader extends IDisposable

Remarks

The IDataReader 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 IDataReader interface directly, but creates an instance of a class that implements IDataReader.

Classes that implement IDataReader 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 IDataReader. 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.

Platforms

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms