Variables.GetEnumerator 方法

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

返回

一个 VariableEnumerator 枚举器。

示例

下面的代码示例将变量添加到包中。 代码示例使用各种方法查找变量并打印其名称、值和命名空间。

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  

示例输出：

找到了变量？ True

变量：myCustomVar，3

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

[0] myCustomVar， User

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

第一个变量的名称和命名空间为：CancelEvent、System

第一个变量的名称为：CancelEvent

适用于