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Classe AdomdDataReader

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Provides a means of reading a forward-only result set that is obtained by running a command, and can be used to access analytical data sources.

Hiérarchie d'héritage

System.Object
  System.MarshalByRefObject
    Microsoft.AnalysisServices.AdomdClient.AdomdDataReader

Espace de noms :  Microsoft.AnalysisServices.AdomdClient
Assembly :  Microsoft.AnalysisServices.AdomdClient (en Microsoft.AnalysisServices.AdomdClient.dll)

Syntaxe

'Déclaration
Public NotInheritable Class AdomdDataReader _
    Inherits MarshalByRefObject _
    Implements IDataReader, IDisposable, IDataRecord, IEnumerable
'Utilisation
Dim instance As AdomdDataReader

public sealed class AdomdDataReader : MarshalByRefObject, 
    IDataReader, IDisposable, IDataRecord, IEnumerable

public ref class AdomdDataReader sealed : public MarshalByRefObject, 
    IDataReader, IDisposable, IDataRecord, IEnumerable

[<SealedAttribute>]
type AdomdDataReader =  
    class 
        inherit MarshalByRefObject 
        interface IDataReader 
        interface IDisposable 
        interface IDataRecord 
        interface IEnumerable 
    end

public final class AdomdDataReader extends MarshalByRefObject implements IDataReader, IDisposable, IDataRecord, IEnumerable

Le type AdomdDataReader expose les membres suivants.

Propriétés

  Nom Description
Propriété publique Depth Gets a value indicating the depth of nesting for the current row.
Propriété publique FieldCount Gets a value indicating the number of columns in the current row.
Propriété publique IsClosed Gets a value indicating whether the data reader is closed.
Propriété publique Item[Int32] Gets the value of a specified column in its native format, given the ordinal position of the column. In Microsoft Visual C#, this property is the indexer for the AdomdDataReader class.
Propriété publique Item[String] Gets the value of a specified column in its native format, given the name of the column. In Microsoft Visual C#, this property is the indexer for the AdomdDataReader class.
Propriété publique RecordsAffected This member is reserved for future use.

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Méthodes

  Nom Description
Méthode publique Close Closes the AdomdDataReader.
Méthode publique CreateObjRef Informations critiques de sécurité. (hérité de MarshalByRefObject.)
Méthode publique Dispose Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
Méthode publique Equals (hérité de Object.)
Méthode publique GetBoolean Returns a Boolean that contains the value from the specified column.
Méthode publique GetByte Returns a Byte that contains the value from the specified column.
Méthode publique GetBytes This member is reserved for future use.
Méthode publique GetChar Returns a Char that contains the value from the specified column.
Méthode publique GetChars Returns an array of Char objects that contain a stream of values from the specified column.
Méthode publique GetData Returns a System.Data.IDataReader interface to be used when a column points to more remote structured data.
Méthode publique GetDataReader Gets an AdomdDataReader object from the specified column.
Méthode publique GetDataTypeName Returns a String that contains the full name of the data type for the specified column.
Méthode publique GetDateTime Returns a DateTime that contains the value from the specified column.
Méthode publique GetDecimal Returns a Decimal that contains the value from the specified column.
Méthode publique GetDouble Returns a Double that contains the value from the specified column.
Méthode publique GetEnumerator Gets an IEnumerator interface for iterating through the collection.
Méthode publique GetFieldType Returns a Type that represents the data type of the specified column.
Méthode publique GetFloat Returns a Float that contains the value from the specified column.
Méthode publique GetGuid Returns a Guid that contains the value from the specified column.
Méthode publique GetHashCode (hérité de Object.)
Méthode publique GetInt16 Returns an Int16 that contains the value from the specified column.
Méthode publique GetInt32 Returns an Int32 that contains the value from the specified column.
Méthode publique GetInt64 Returns an Int64 that contains the value from the specified column.
Méthode publique GetLifetimeService Informations critiques de sécurité. (hérité de MarshalByRefObject.)
Méthode publique GetName Returns the name of the specified column.
Méthode publique GetOrdinal Returns the ordinal position of the specified column.
Méthode publique GetSchemaTable Returns a DataTable that describes the column metadata of the AdomdDataReader.
Méthode publique GetString Returns a String that contains the value from the specified column.
Méthode publique GetTimeSpan Gets the value of the specified column as a TimeSpan object.
Méthode publique GetType (hérité de Object.)
Méthode publique GetValue Returns the value for the specified column in its native format.
Méthode publique GetValues Gets an array of values for all of the columns in the current row.
Méthode publique InitializeLifetimeService Informations critiques de sécurité. (hérité de MarshalByRefObject.)
Méthode publique IsDBNull Returns a Boolean that contains a value indicating whether the column is set to null.
Méthode publique NextResult This member is reserved for future use.
Méthode publique Read Advances the AdomdDataReader to the next row.
Méthode publique ToString (hérité de Object.)

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Implémentations d'interfaces explicites

  Nom Description
Implémentation d'interface expliciteMéthode privée IEnumerable.GetEnumerator Gets the enumerator that iterates through the collection.

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Notes

The AdomdDataReader class is the implementation of the [System.Data.IDataReader] interface for ADOMD.NET. All Microsoft .NET Framework data providers implement the [System.Data.IDataReader] interface as a way of quickly reading forward-only result sets.

To create an AdomdDataReader, you must call the ExecuteReader method of the AdomdCommand, rather than directly using a constructor.

While the AdomdDataReader is in use, the AdomdCommand and the associated AdomdConnection is busy serving the AdomdDataReader. While in this state, no operations can be performed on the AdomdConnection or AdomdCommand objects other than closing them. This remains the case until the Close or Dispose method of the AdomdDataReader is called. Changes made to a result set by another process or thread while data is being read may be visible to the user of the AdomdDataReader. However, the precise behavior is timing dependent.

IsClosed and RecordsAffected are the only properties that you can call after the AdomdDataReader is closed.

Sécurité des threads

Tous les membres publics static (Shared dans Visual Basic) de ce type sont thread-safe. Tous les membres de l'instance ne sont pas garantis comme étant thread-safe.

Voir aussi

Référence

Espace de noms Microsoft.AnalysisServices.AdomdClient