PackageInfoEnumerator.Current 属性

public:
 property Microsoft::SqlServer::Dts::Runtime::PackageInfo ^ Current { Microsoft::SqlServer::Dts::Runtime::PackageInfo ^ get(); };

public Microsoft.SqlServer.Dts.Runtime.PackageInfo Current { get; }

member this.Current : Microsoft.SqlServer.Dts.Runtime.PackageInfo

Public ReadOnly Property Current As PackageInfo

属性值

PackageInfo

PackageInfo 对象。

示例

下面的代码示例从 Samples 文件夹中加载两个包，并将其保存到 DTS 服务。 然后，它会创建一个枚举器，并使用 MoveNext 和 Current 方法循环访问包并打印其名称。

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

namespace PackageInfoTest  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            string pkg = @"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\ExecuteProcess Sample\ExecuteProcess\UsingExecuteProcess.dtsx";  
            string pkg2 = @"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx";  

            Application app = new Application();  
            Package p1 = app.LoadPackage(pkg, null);  
            Package p2 = app.LoadPackage(pkg2, null);  
            p1.Description = "UsingExecuteProcess package";  
            p2.Description = "Calculated Columns package";  

            app.SaveToDtsServer(p1, null, @"File System\myp1Package", "YOURSERVER");  
            app.SaveToDtsServer(p2, null, @"File System\myp2Package", "YOURSERVER");  

            PackageInfos pInfos = app.GetDtsServerPackageInfos(@"File System", "YOURSERVER");  
            Console.WriteLine("Number of Packages {0}", pInfos.Count.ToString());  

            PackageInfoEnumerator iEnum = pInfos.GetEnumerator();  

            while (iEnum.MoveNext())  
                {  
                    String pkgName = iEnum.Current.Name;  
                    Console.WriteLine(pkgName);   
                }  
         }  
    }  
}  

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

Namespace PackageInfoTest  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            Dim pkg As String =  "C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\ExecuteProcess Sample\ExecuteProcess\UsingExecuteProcess.dtsx"   
            Dim pkg2 As String =  "C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx"   

            Dim app As Application =  New Application()   
            Dim p1 As Package =  app.LoadPackage(pkg,Nothing)   
            Dim p2 As Package =  app.LoadPackage(pkg2,Nothing)   
            p1.Description = "UsingExecuteProcess package"  
            p2.Description = "Calculated Columns package"  

            app.SaveToDtsServer(p1, Nothing, "File System\myp1Package", "YOURSERVER")  
            app.SaveToDtsServer(p2, Nothing, "File System\myp2Package", "YOURSERVER")  

            Dim pInfos As PackageInfos =  app.GetDtsServerPackageInfos("File System","YOURSERVER")   
            Console.WriteLine("Number of Packages {0}", pInfos.Count.ToString())  

            Dim iEnum As PackageInfoEnumerator =  pInfos.GetEnumerator()   

            While iEnum.MoveNext()  
                    Dim pkgName As String =  iEnum.Current.Name   
                    Console.WriteLine(pkgName)  
            End While  
        End Sub  
    End Class  
End Namespace  

示例输出：

包数 2

myp1Package

myp2Package

注解

创建枚举器或调用 Reset 方法后， MoveNext 必须调用该方法，以便将枚举器提升到集合的第一个元素，然后枚举器才能读取属性的值 Current ;否则， Current 未定义并引发异常。

Current如果最后一次调用返回false，则还会引发异常，该调用MoveNext指示集合的末尾。

Current 不会移动枚举器的位置，并且连续调用以 Current 返回同一对象，直到 MoveNext 调用或 Reset 调用。

只要集合保持不变，枚举器就仍有效。 如果对集合进行了更改（如添加、修改或删除元素），则枚举器将失效并变为不可恢复;因此，下一次调用 MoveNext 或 Reset 引发一个 InvalidOperationException。 但是，如果在调用和Current调用MoveNext之间修改集合，Current则返回它设置为的元素，即使枚举器已失效。

适用于