ForEachEnumeratorHost.CollectionEnumerator Property

Articolo
12/15/2008

Gets or sets a Boolean that indicates if the hosting enumerator is enumerating collections of objects or enumerating collections of collections.

Spazio dei nomi: Microsoft.SqlServer.Dts.Runtime
Assembly : Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Sintassi

'Dichiarazione
Public Property CollectionEnumerator As Boolean

public bool CollectionEnumerator { get; set; }

public:
virtual property bool CollectionEnumerator {
    bool get () sealed;
    void set (bool value) sealed;
}

/** @property */
public final boolean get_CollectionEnumerator ()

/** @property */
public final void set_CollectionEnumerator (boolean value)

public final function get CollectionEnumerator () : boolean

public final function set CollectionEnumerator (value : boolean)

Valore proprietà

A Boolean that indicates what the enumerator is iterating over.

Osservazioni

true indicates that the enumerator is iterating over a collection of collections. If false, the enumerator is iterating over a collection of objects.

Esempio

The following code example creates a ForEachEnumeratorHost to hold a ForEachSMOEnumerator enumerator, and displays the host properties.

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO;
using Microsoft.SqlServer.Dts.Runtime;

namespace Microsoft.SqlServer.SSIS.Sample
{
    internal class EnumType
    {
        public const string SMOEnum = "Foreach SMO Enumerator";
    }
    class Program
    {
        static void Main(string[] args)
        {
            Application app = new Application();
            ForEachEnumeratorInfos infos = app.ForEachEnumeratorInfos;
            ForEachEnumeratorInfo info = null;

            foreach (ForEachEnumeratorInfo enumInfo in infos)
            {
                Console.Write("Available enumerators: {0}\n", enumInfo.Name);
                if (enumInfo.Name == EnumType.SMOEnum)
                {
                    // Set the ForEachEnumeratorInfo variable
                    // to the SMo enumerator, and use it 
                    // later in the CreateNew method.
                    info = enumInfo;
                }
        }
            ForEachEnumeratorHost enumH = info.CreateNew();
            Console.WriteLine();
            Console.WriteLine("Host InnerObject: " + enumH.InnerObject.ToString());
            Console.WriteLine("CollectionEnumerator? {0}", enumH.CollectionEnumerator);
            Console.WriteLine("CreationName: {0}",  enumH.CreationName);
            Console.WriteLine("Description:  {0}", enumH.Description);
            Console.WriteLine("Value of DelayValidation: {0}", enumH.DelayValidation);
            Console.WriteLine("HostType:    {0}", enumH.HostType);
            Console.WriteLine("ID:          {0}", enumH.ID);
            Console.WriteLine("Name:        {0}", enumH.Name);
        }
    }
}

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO
Imports Microsoft.SqlServer.Dts.Runtime
 
Namespace Microsoft.SqlServer.SSIS.Sample
    Friend Class EnumType
        Public const String SMOEnum = "Foreach SMO Enumerator"
    End Class
    Class Program
        Shared  Sub Main(ByVal args() As String)
            Dim app As Application =  New Application() 
            Dim infos As ForEachEnumeratorInfos =  app.ForEachEnumeratorInfos 
            Dim info As ForEachEnumeratorInfo =  Nothing 
 
            Dim enumInfo As ForEachEnumeratorInfo
            For Each enumInfo In infos
                Console.Write("Available enumerators: {0}\n", enumInfo.Name)
                If enumInfo.Name = EnumType.SMOEnum Then
                    ' Set the ForEachEnumeratorInfo variable
                    ' to the SMo enumerator, and use it 
                    ' later in the CreateNew method.
                    info = enumInfo
                End If
            Next
            Dim enumH As ForEachEnumeratorHost =  info.CreateNew() 
            Console.WriteLine()
            Console.WriteLine("Host InnerObject: " + enumH.InnerObject.ToString())
            Console.WriteLine("CollectionEnumerator? {0}", enumH.CollectionEnumerator)
            Console.WriteLine("CreationName: {0}",  enumH.CreationName)
            Console.WriteLine("Description:  {0}", enumH.Description)
            Console.WriteLine("Value of DelayValidation: {0}", enumH.DelayValidation)
            Console.WriteLine("HostType:    {0}", enumH.HostType)
            Console.WriteLine("ID:          {0}", enumH.ID)
            Console.WriteLine("Name:        {0}", enumH.Name)
        End Sub
    End Class
End Namespace

Sample Output:

Available enumerators: Foreach File Enumerator

Available enumerators: Foreach Item Enumerator

Available enumerators: Foreach ADO Enumerator

Available enumerators: Foreach ADO.NET Schema Rowset Enumerator

Available enumerators: Foreach From Variable Enumerator

Available enumerators: Foreach NodeList Enumerator

Available enumerators: Foreach SMO Enumerator

Host InnerObject: Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO.ForEachSMOEnumerator

CollectionEnumerator? False

CreationName: Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO.ForEachSMOEnumerator, Microsoft.SqlServer.ForEachSMOEnumerator, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91

Description:

Value of DelayValidation: False

HostType: ForEachEnumerator

ID: {C91BA4D0-6AD4-4BEE-A7C4-9A737880773E}

Name: {C91BA4D0-6AD4-4BEE-A7C4-9A737880773E}

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Piattaforme

Piattaforme di sviluppo

Per un elenco delle piattaforme supportate, vedere Requisiti hardware e software per l'Installazione di SQL Server 2005.

Piattaforme di destinazione