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.
public interface class IDataReader : IDisposable
public interface IDataReader : IDisposable
Public Interface IDataReader Implements IDisposable
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.
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.
|FieldCount FieldCount FieldCount||
Gets the number of fields in the data reader.
|GetFieldType(Int32) GetFieldType(Int32) GetFieldType(Int32)||
Gets the Type information corresponding to the type of object that is returned from GetValue(Int32).
|GetName(Int32) GetName(Int32) GetName(Int32)||
Gets the name of the field to find.
|GetOrdinal(String) GetOrdinal(String) GetOrdinal(String)||
Return the index of the named field.
|GetValue(Int32) GetValue(Int32) GetValue(Int32)||
Return the value of the specified field.
|Read() Read() Read()||
Advances the IDataReader to the next record.