HierarchyCollection 類別

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

繼承階層

System.Object
  Microsoft.AnalysisServices.AdomdClient.HierarchyCollection

命名空間：  Microsoft.AnalysisServices.AdomdClient
組件：  Microsoft.AnalysisServices.AdomdClient (在 Microsoft.AnalysisServices.AdomdClient.dll 中)

語法

'宣告
Public NotInheritable Class HierarchyCollection _
    Implements ICollection, IEnumerable
'用途
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

HierarchyCollection 型別公開下列成員。

屬性

	名稱	說明
	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 Hierarchy from the collection by its specified 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.

上層

方法

	名稱	說明
	CopyTo	Copies the elements of the collection to the specified array.
	Equals	(繼承自 Object。)
	Find	Gets the specified Hierarchy from the collection by its name.
	GetEnumerator	Gets an enumerator for iterating through the collection.
	GetHashCode	(繼承自 Object。)
	GetType	(繼承自 Object。)
	ToString	(繼承自 Object。)

上層

明確 繼承 實作

	名稱	說明
	ICollection.CopyTo	Copies the elements of the HierarchyCollection to an array, starting at a particular array index.
	IEnumerable.GetEnumerator	Gets an enumerator for iterating through the HierarchyCollection.

上層

備註

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.

範例

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

執行緒安全性

這個型別的任何公用 static (在 Visual Basic 中為 Shared) 成員都是執行緒安全的。並不是所有的執行個體成員都保證可以用於所有的執行緒。

請參閱

參考

Microsoft.AnalysisServices.AdomdClient 命名空間