SMODataFileEnumerator.Reset Méthode

public:
 virtual void Reset();

public void Reset ();

abstract member Reset : unit -> unit
override this.Reset : unit -> unit

Public Sub Reset ()

Implémente

Exemples

L’exemple de code suivant crée un ForEachLoopénumérateur SMO et l’héberge dans un ForEachEnumeratorHost, où il est ensuite ajouté comme ForEachEnumerator dans le ForEachLoopfichier . Retour d’un ForEachSMOEnumerator, un SMODataFileEnumerator est créé en tant qu’itération System.Collections.IEnumerator sur l’utilisation MoveNext et Current. Une fois l’index passé la fin de la collection, il Reset est utilisé pour réinitialiser l’itérateur.

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

namespace SmoDataFileEnumerator  
{  
    class Program  
    {  
        const string PACKAGEFILENAME = @"\SmoDataFileEnumeratorPackage.dtsx";  
        static void Main(string[] args)  
        {  
            // Create the SSIS application  
            Application application = new Application();  

            // Create the new package  
            Package package = new Package();  
            package.PackageType = DTSPackageType.DTSDesigner;  
            package.Name = "SMODataFileEnumerator Sample";  
            package.Description = "This is a sample for SMODataFileEnumerator";  
            // Use System.Environment.MachineName; in the following line of code.  
            package.CreatorComputerName = @"MACHINENAME";  
            // Use System.Environment.UserName; in the following line of code.  
            package.CreatorName = @"USERNAME";  

            // Adds the ADO.NET connection manager to the package  
            Connections connections = package.Connections;  
            ConnectionManager connectionManager = connections.Add("ADO.NET:SQL");  
            Console.WriteLine("ConnectionManager creation name: {0}", connectionManager.CreationName);  
            connectionManager.Name = "localhost.AdventureWorks";  
            connectionManager.ConnectionString = "Data Source=localhost;"  
                + "Initial Catalog=AdventureWorks;"  
                + "Integrated Security=True;";  

            // Create ForEach SMO Loop task  
            Executables executables = package.Executables;  
            ForEachLoop forEachLoop = executables.Add("STOCK:FOREACHLOOP") as ForEachLoop;  
            forEachLoop.Name = "Foreach Loop Container";  
            forEachLoop.Description = "Foreach Loop Container";  

            Console.WriteLine("ForEachLoop creation name: {0}", forEachLoop.CreationName);  
            ForEachEnumeratorInfo forEachEnumeratorInfo  
                = application.ForEachEnumeratorInfos["Foreach SMO Enumerator"];  
            ForEachEnumeratorHost forEachEnumeratorHost = forEachEnumeratorInfo.CreateNew();  
            forEachLoop.ForEachEnumerator = forEachEnumeratorHost;  

            // Setup the SMO enumerator  
            ForEachSMOEnumerator forEachSMOEnumerator = forEachEnumeratorHost.InnerObject as ForEachSMOEnumerator;  
            forEachSMOEnumerator.EnumURN = "RuntimeServer[@Connection='"  
            + connectionManager.ID + @"']/Server[@Name='localhost']"  
                + @"/Database[@Name='AdventureWorks']"  
                + @"/SMOEnumObj[@Name='DataFiles']"  
                + @"/SMOEnumType[@Name='Locations']";  

            System.Collections.IEnumerator smoDataFileEnumerator = forEachSMOEnumerator.GetEnumerator(  
            connections, null, null, null) as System.Collections.IEnumerator;  
            Console.WriteLine("The collection contains the following values:");  
            int i = 0;  
            while ((smoDataFileEnumerator.MoveNext()) && (smoDataFileEnumerator.Current != null))  
                Console.WriteLine("[{0}] {1}", i++, smoDataFileEnumerator.Current);  

            smoDataFileEnumerator.Reset();  
            // Validate the layout of the package  
            DTSExecResult status = package.Validate(package.Connections, null, null, null);  
            Console.WriteLine("Validation result: " + status);  

            // Save the package  
            String currentDirectory = Environment.CurrentDirectory;  
            application.SaveToXml(currentDirectory + PACKAGEFILENAME, package, null);  
            Console.WriteLine("Package saved to " + currentDirectory + PACKAGEFILENAME);  
        }  
    }  
}  

Imports System  
Imports System.Collections.Generic  
Imports System.Text  
Imports Microsoft.SqlServer.Dts.Runtime  
Imports Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO  

Namespace SmoDataFileEnumerator  
    Class Program  
        const String PACKAGEFILENAME = "\SmoDataFileEnumeratorPackage.dtsx"  
        Shared  Sub Main(ByVal args() As String)  
            ' Create the SSIS application  
            Dim application As Application =  New Application()   

            ' Create the new package  
            Dim package As Package =  New Package()   
            package.PackageType = DTSPackageType.DTSDesigner  
            package.Name = "SMODataFileEnumerator Sample"  
            package.Description = "This is a sample for SMODataFileEnumerator"  
            ' Use System.Environment.MachineName; in the following line of code.  
            package.CreatorComputerName = "MACHINENAME"  
            ' Use System.Environment.UserName; in the following line of code.  
            package.CreatorName = "USERNAME"  

            ' Adds the ADO.NET connection manager to the package  
            Dim connections As Connections =  package.Connections   
            Dim connectionManager As ConnectionManager =  connections.Add("ADO.NET:SQL")   
            Console.WriteLine("ConnectionManager creation name: {0}", connectionManager.CreationName)  
            connectionManager.Name = "localhost.AdventureWorks"  
            connectionManager.ConnectionString = "Data Source=localhost;"  
                + "Initial Catalog=AdventureWorks;"  
                Dim "Integrated Security=True;" As +  

            ' Create ForEach SMO Loop task  
            Dim executables As Executables =  package.Executables   
            Dim forEachLoop As ForEachLoop =  executables.Add("STOCK:FOREACHLOOP") as ForEachLoop   
            forEachLoop.Name = "Foreach Loop Container"  
            forEachLoop.Description = "Foreach Loop Container"  

            Console.WriteLine("ForEachLoop creation name: {0}", forEachLoop.CreationName)  
            ForEachEnumeratorInfo forEachEnumeratorInfo  
                Dim  As =  
            Dim forEachEnumeratorHost As ForEachEnumeratorHost =  forEachEnumeratorInfo.CreateNew()   
            forEachLoop.ForEachEnumerator = forEachEnumeratorHost  

            ' Setup the SMO enumerator  
            Dim forEachSMOEnumerator As ForEachSMOEnumerator =  forEachEnumeratorHost.InnerObject as ForEachSMOEnumerator   
            forEachSMOEnumerator.EnumURN = "RuntimeServer[@Connection='"  
            + connectionManager.ID + "']/Server[@Name='localhost']"  
                + "/Database[@Name='AdventureWorks']"  
                + "/SMOEnumObj[@Name='DataFiles']"  
                Dim "/SMOEnumType[@Name='Locations']" As +  

            System.Collections.IEnumerator smoDataFileEnumerator = forEachSMOEnumerator.GetEnumerator(  
            connections, Nothing, Nothing, Nothing) as System.Collections.IEnumerator  
            Console.WriteLine("The collection contains the following values:")  
            Dim i As Integer =  0   
            While (smoDataFileEnumerator.MoveNext()) &&(smoDataFileEnumerator.Current <> Nothing)  
                Console.WriteLine("[{0}] {1}",i = Console.WriteLine("[{0}] {1}",i + 1  
            End While  

            smoDataFileEnumerator.Reset()  
            ' Validate the layout of the package  
            Dim status As DTSExecResult =  package.Validate(package.Connections,Nothing,Nothing,Nothing)   
            Console.WriteLine("Validation result: " + status)  

            ' Save the package  
            Dim currentDirectory As String =  Environment.CurrentDirectory   
            application.SaveToXml(currentDirectory + PACKAGEFILENAME, package, Nothing)  
            Console.WriteLine("Package saved to " + currentDirectory + PACKAGEFILENAME)  
        End Sub  
    End Class  
End Namespace  

Remarques

Un énumérateur reste valide aussi longtemps que la collection demeure inchangée. Si des modifications sont apportées à la collection, telles que l’ajout, la modification ou la suppression d’éléments, l’énumérateur est irrécupérablement invalidé et l’appel suivant ou MoveNextReset provoque une exception.

S’applique à