Classe HierarchyCollection

Contains a read-only, on-demand collection of Hierarchy objects contained in a Dimension or a Set.

Gerarchia di ereditarietà

System. . :: . .Object
  Microsoft.AnalysisServices.AdomdClient..::..HierarchyCollection

Spazio dei nomi  Microsoft.AnalysisServices.AdomdClient
Assembly:  Microsoft.AnalysisServices.AdomdClient (in Microsoft.AnalysisServices.AdomdClient.dll)

Sintassi

'Dichiarazione
Public NotInheritable Class HierarchyCollection _
    Implements ICollection, IEnumerable
'Utilizzo
Dim instance As HierarchyCollection

public sealed class HierarchyCollection : ICollection, 
    IEnumerable

public ref class HierarchyCollection sealed : ICollection, 
    IEnumerable

[<SealedAttribute>]
type HierarchyCollection =  
    class
        interface ICollection
        interface IEnumerable
    end

public final class HierarchyCollection implements ICollection, IEnumerable

Nel tipo HierarchyCollection sono esposti i membri seguenti.

Proprietà

	Nome	Descrizione
	Count	Gets the number of Hierarchy objects in the collection.
	IsSynchronized	Gets a value indicating whether access to the collection is synchronized (thread safe).
	Item[ ( [ ( Int32] ) ] )	Gets the specified Hierarchy from the collection by its index. In C#, this property is the indexer for the HierarchyCollection class.
	Item[ ( [ ( String] ) ] )	Gets the specified Hierarchy from the collection by its name. In C#, this property is the indexer for the HierarchyCollection class.
	SyncRoot	Gets an object that can be used to synchronize access to the collection.

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Metodi

	Nome	Descrizione
	CopyTo	Copies the elements of the collection to the specified array.
	Equals	Ereditato da Object.
	Finalize	Ereditato da Object.
	Find	Gets the specified Hierarchy from the collection by its name.
	GetEnumerator	Gets an Enumerator for iterating through the collection.
	GetHashCode	Ereditato da Object.
	GetType	Ereditato da Object.
	MemberwiseClone	Ereditato da Object.
	ToString	Ereditato da Object.

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Implementazioni esplicite dell'interfaccia

	Nome	Descrizione
	ICollection. . :: . .CopyTo
	IEnumerable. . :: . .GetEnumerator

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Osservazioni

While the HierarchyCollection externally represents a collection of Hierarchy objects, the collection is internally loaded and managed in one of two ways, depending on the parent of the collection:

• If the parent object was referenced as a result of a query, as in the case of a Set referenced from an Axis, the collection represents the members referenced by that query.

• If the parent object was referenced as a result of a request for metadata, as in the case of a Dimension referenced from a CubeDef, the collection represents the members referenced by the definition of the parent object.

Esempi

The following subroutine, given a Dimension, iterates through the HierarchyCollection collection and displays information about each hierarchy:

Public Overloads Sub ListHierarchies(ByRef DimToCheck As Dimension)

    ' Check the parameter before performing actions on it.
    If DimToCheck Is Nothing Then
        Throw New System.ArgumentNullException("DimToCheck")
    Else
        ' Iterate through the Hierarchies collection of the
        ' Dimension object.

        Try
            Dim hierToCheck As Hierarchy

            Debug.WriteLine("Found " & DimToCheck.Hierarchies.Count & _
                " hierarchies in dimension:")

            For Each hierToCheck In DimToCheck.Hierarchies
                Debug.WriteLine("Hierarchy:  " & hierToCheck.Name)
                Debug.WriteLine("  Caption:        " & _
                    hierToCheck.Caption)
                Debug.WriteLine("  Description:    " & _
                    hierToCheck.Description)
                Debug.WriteLine("  UniqueName:     " & _
                    hierToCheck.UniqueName)
            Next
        Catch ex As AdomdConnectionException
            ' The connection could not be opened or was disconnected.
            ' This error can occur at any time, if the provider is 
            ' disconnected from the server.
            Debug.WriteLine(ex)
            Throw ex
        Catch ex As AdomdErrorResponseException
            ' A response is received from a provider which indicates an error.
            Debug.WriteLine(ex)
            Throw ex
        Catch ex As AdomdUnknownResponseException
            ' A response has been returned from the provider that 
            ' was not understood.
            Debug.WriteLine(ex)
            Throw ex
        Catch ex As AdomdCacheExpiredException
            ' A cached version of an ADOMD.NET object is no longer valid.
            ' This error is typically raised when reviewing metadata.
            Debug.WriteLine(ex)
            Throw ex
        Catch ex As AdomdException
            ' Any other error raised by ADOMD.NET.
            Debug.WriteLine(ex)
            Throw ex
        Catch ex As Exception
            ' Any other error.
            Debug.WriteLine(ex)
            Throw ex
        End Try
    End If
End Sub

Protezione dei thread

I membri static (Shared in Visual Basic) pubblici di questo tipo sono affidabili. Non è invece garantita la sicurezza dei membri dell'istanza.

Vedere anche

Riferimento

Spazio dei nomi Microsoft.AnalysisServices.AdomdClient