SMOEnumerator.Reset Metode

Definisi

Ruang nama:

Microsoft.SqlServer.Dts.Runtime.Enumerators.SMO

Rakitan:

Microsoft.SqlServer.ForEachSMOEnumerator.dll

Mengatur enumerator ke posisi awalnya, yaitu sebelum elemen pertama dalam koleksi.

public:
 virtual void Reset();

public void Reset ();

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

Public Sub Reset ()

Penerapan

Reset()

Contoh

Contoh kode berikut membuat ForEachLoop, membuat enumerator SMO dan menghostingnya di ForEachEnumeratorHost, di mana kemudian ditambahkan sebagai ForEachEnumerator di ForEachLoop. Mengembalikan ForEachSMOEnumerator, dibuat SMOEnumerator sebagai System.Collections.IEnumerator dan diulang melalui penggunaan MoveNext dan Current. Setelah koleksi melewati akhir, Reset digunakan untuk mengatur ulang iterator.

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

namespace SMOEnumerator  
{  
    class Program  
    {  
        const string PACKAGEFILENAME = @"\SamplePackage.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.DTSDesigner100;  
            package.Name = "SMOEnumerator Sample";  
            package.Description = "This is a sample for SMOEnumerator";  
            package.CreatorComputerName = @"MACHINENAME"; // System.Environment.MachineName;  
            package.CreatorName = @"USERNAME"; //System.Environment.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";  

            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='Tables']"  
                + @"/SMOEnumType[@Name='ObjectsPP']";  

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

             smoEnumerator.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 SMOEnumerator  
    Class Program  
        const String PACKAGEFILENAME = "\SamplePackage.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.DTSDesigner100  
            package.Name = "SMOEnumerator Sample"  
            package.Description = "This is a sample for SMOEnumerator"  
            package.CreatorComputerName = "MACHINENAME" ' System.Environment.MachineName;  
            package.CreatorName = "USERNAME" 'System.Environment.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"  

            Dim forEachEnumeratorInfo As ForEachEnumeratorInfo =  application.ForEachEnumeratorInfos("Foreach SMO Enumerator")   
            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='Tables']"  
                Dim "/SMOEnumType[@Name='ObjectsPP']" As +  

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

             smoEnumerator.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  

Keterangan

Enumerator tetap valid selama koleksi tetap tidak berubah. Jika perubahan dilakukan pada koleksi, seperti menambahkan, memodifikasi, atau menghapus elemen, enumerator tidak valid dan panggilan berikutnya ke MoveNext atau Reset menyebabkan pengecualian.