Interface IDataReader
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 (em Microsoft.ReportingServices.Interfaces.dll)
Sintaxe
'Declaração
Public Interface IDataReader _
Inherits IDisposable
'Uso
Dim instance As IDataReader
public interface IDataReader : IDisposable
public interface class IDataReader : IDisposable
type IDataReader =
interface
interface IDisposable
end
public interface IDataReader extends IDisposable
Comentários
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 Implementando uma classe DataReader para uma extensão de processamento de dados.
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.