Variables.GetEnumerator Methode

Definition

Namespace:

Microsoft.SqlServer.Dts.Runtime

Assembly:

Microsoft.SqlServer.ManagedDTS.dll

Gibt einen VariableEnumerator-Enumerator zum Durchlaufen der Variables-Auflistung zurück.

public:
 Microsoft::SqlServer::Dts::Runtime::VariableEnumerator ^ GetEnumerator();

public Microsoft.SqlServer.Dts.Runtime.VariableEnumerator GetEnumerator ();

override this.GetEnumerator : unit -> Microsoft.SqlServer.Dts.Runtime.VariableEnumerator

Public Function GetEnumerator () As VariableEnumerator

Gibt zurück

VariableEnumerator

Ein VariableEnumerator-Enumerator.

Beispiele

Im folgenden Codebeispiel wird dem Paket eine Variable hinzugefügt. Im Codebeispiel werden verschiedene Methoden verwendet, um die Variable zu suchen und den Namen, den Wert und den Namespace zu drucken.

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

namespace Adding_Variables  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            Application app = new Application();  
            // Load a sample package that contains a variable that sets the file name.  
            Package pkg = app.LoadPackage(@"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx", null);  
            Variables pkgVars = pkg.Variables;  
            Variable myVar = pkg.Variables.Add("myCustomVar", false, "User", "3");  

            // Verify whether the variable is in the collection now.  
            Boolean hasMyVar = pkg.Variables.Contains("myCustomVar");  
            Console.WriteLine("The variable was found? {0}", hasMyVar);  

            // Loop over the collection using the foreach keyword.  
            foreach (Variable pkgVar in pkgVars)  
            {  
                // Print variables only from the User namespace.  
                if (pkgVar.Namespace == "User")  
                {  
                Console.WriteLine("Variable: {0}, {1}", pkgVar.Name, pkgVar.Value.ToString());  
                 }  
            }  
            Console.WriteLine("---------------------------");  
            // Loop over the collection using the Enumerator.   
            VariableEnumerator myEnum = pkg.Variables.GetEnumerator();  
            int i = 0;  
            while ((myEnum.MoveNext()) && (myEnum.Current != null))  
                // Again, show variables only from the User namespace.  
                if (myEnum.Current.Namespace == "User")  
                {                  
                    Console.WriteLine("[{0}] {1}, {2}", i++, myEnum.Current.Name, myEnum.Current.Namespace);  
                }  

            myEnum.Reset();  
            Console.WriteLine("---------------------------");  

            //Using the Item method syntax of [x], obtain the  
            // first entry in the collection.  
            myVar = pkgVars[0];  
            Console.WriteLine("The name and namespace of the first variable is: {0}, {1}", myVar.Name, myVar.Namespace);  
            String nameOfFirstItem = pkgVars[0].Name;  
            Console.WriteLine("The name of the first variable is: {0}", nameOfFirstItem);  
            //}  
        }  
    }  
}  

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

Namespace Adding_Variables  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim app As Application =  New Application()   
            ' Load a sample package that contains a variable that sets the file name.  
            Dim pkg As Package =  app.LoadPackage("C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx",Nothing)   
            Dim pkgVars As Variables =  pkg.Variables   
            Dim myVar As Variable =  pkg.Variables.Add("myCustomVar",False,"User","3")   

            ' Verify whether the variable is in the collection now.  
            Dim hasMyVar As Boolean =  pkg.Variables.Contains("myCustomVar")   
            Console.WriteLine("The variable was found? {0}", hasMyVar)  

            ' Loop over the collection using the foreach keyword.  
            Dim pkgVar As Variable  
            For Each pkgVar In pkgVars  
                ' Print variables only from the User namespace.  
                If pkgVar.Namespace = "User" Then  
                Console.WriteLine("Variable: {0}, {1}", pkgVar.Name, pkgVar.Value.ToString())  
                End If  
            Next  
            Console.WriteLine("---------------------------")  
            ' Loop over the collection using the Enumerator.   
            Dim myEnum As VariableEnumerator =  pkg.Variables.GetEnumerator()   
            Dim i As Integer =  0   
            While (myEnum.MoveNext()) &&(myEnum.Current <> Nothing)  
                    Console.WriteLine("[{0}] {1}, {2}",i = Console.WriteLine("[{0}] {1}, {2}",i + 1  
            End While  

            myEnum.Reset()  
            Console.WriteLine("---------------------------")  

            'Using the Item method syntax of [x], obtain the  
            ' first entry in the collection.  
            myVar = pkgVars(0)  
            Console.WriteLine("The name and namespace of the first variable is: {0}, {1}", myVar.Name, myVar.Namespace)  
            Dim nameOfFirstItem As String =  pkgVars(0).Name   
            Console.WriteLine("The name of the first variable is: {0}", nameOfFirstItem)  
            '}  
        End Sub  
    End Class  
End Namespace  

Beispielausgabe:

Die Variable wurde gefunden? True

Variable: myCustomVar, 3

---------------------------

[0] myCustomVar, Benutzer

---------------------------

Der Name und der Namespace der ersten Variable lautet: CancelEvent, System

Der Name der ersten Variable lautet: CancelEvent