IDataReaderExtension 인터페이스

구문

‘선언
Public Interface IDataReaderExtension _
    Inherits IDataReader, IDisposable
‘사용 방법
Dim instance As IDataReaderExtension

public interface IDataReaderExtension : IDataReader, 
    IDisposable

public interface class IDataReaderExtension : IDataReader, 
    IDisposable

type IDataReaderExtension =  
    interface
        interface IDataReader
        interface IDisposable
    end

public interface IDataReaderExtension extends IDataReader, IDisposable

주의

The IDataReaderExtension interface enables you to implement an extension of the IDataReader interface, which you can use to provide a report server with aggregation information about your result set. For more information about DataReader classes, see 데이터 처리 확장 프로그램에 대한 DataReader 클래스 구현.

An application does not create an instance of the IDataReaderExtension interface directly, but creates an instance of a class that implements IDataReaderExtension.

Classes that implement IDataReaderExtension must also implement the required members, and typically define additional members to add provider-specific functionality. Because IDataReaderExtension inherits from IDataReaderExtension, you must also implement all of the IDataReaderExtension members as part of your DataReader class.

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 IDataReaderExtension. 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.

참고 항목

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