Класс HierarchyCollection

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

Иерархия наследования

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

Пространство имен:  Microsoft.AnalysisServices.AdomdClient
Сборка:  Microsoft.AnalysisServices.AdomdClient (в Microsoft.AnalysisServices.AdomdClient.dll)

Синтаксис

'Декларация
Public NotInheritable Class HierarchyCollection _
    Implements ICollection, IEnumerable
'Применение
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

Тип HierarchyCollection обеспечивает доступ к следующим элементам.

Свойства

	Имя	Описание
	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.

В начало

Методы

	Имя	Описание
	CopyTo	Copies the elements of the collection to the specified array.
	Equals	(Производный от Object.)
	Finalize	(Производный от Object.)
	Find	Gets the specified Hierarchy from the collection by its name.
	GetEnumerator	Gets an Enumerator for iterating through the collection.
	GetHashCode	(Производный от Object.)
	GetType	(Производный от Object.)
	MemberwiseClone	(Производный от Object.)
	ToString	(Производный от Object.)

В начало

Явные реализации интерфейса

	Имя	Описание
	ICollection. . :: . .CopyTo
	IEnumerable. . :: . .GetEnumerator

В начало

Замечания

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.

Примеры

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

Безопасность многопоточности

Любые открытые статический (Shared в Visual Basic) элементы этого типа потокобезопасны. Потокобезопасность с элементами экземпляров не гарантируется.

См. также

Справочник

Пространство имен Microsoft.AnalysisServices.AdomdClient