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AdomdDataReader-Klasse

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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.

Vererbungshierarchie

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

Namespace:  Microsoft.AnalysisServices.AdomdClient
Assembly:  Microsoft.AnalysisServices.AdomdClient (in Microsoft.AnalysisServices.AdomdClient.dll)

Syntax

'Declaration
Public NotInheritable Class AdomdDataReader _
    Inherits MarshalByRefObject _
    Implements IDataReader, IDisposable, IDataRecord, IEnumerable
'Usage
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

Der AdomdDataReader-Typ macht folgende Elemente verfügbar.

Eigenschaften

  Name Beschreibung
Öffentliche Eigenschaft Depth Gets a value indicating the depth of nesting for the current row.
Öffentliche Eigenschaft FieldCount Gets a value indicating the number of columns in the current row.
Öffentliche Eigenschaft IsClosed Gets a value indicating whether the data reader is closed.
Öffentliche Eigenschaft 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.
Öffentliche Eigenschaft 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.
Öffentliche Eigenschaft RecordsAffected This member is reserved for future use.

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Methoden

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

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Explizite Schnittstellenimplementierungen

  Name Beschreibung
Explizite SchnittstellenimplementierungPrivate Methode IEnumerable.GetEnumerator Gets the enumerator that iterates through the collection.

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Hinweise

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.

Threadsicherheit

Alle öffentlichen static (Shared in Visual Basic)-Elemente dieses Typs sind Threadsicher. Für Instanzelemente wird die Threadsicherheit nicht gewährleistet.

Siehe auch

Verweis

Microsoft.AnalysisServices.AdomdClient-Namespace