ExtendedProperties.Item[Object] 属性

public:
 property Microsoft::SqlServer::Dts::Runtime::ExtendedProperty ^ default[System::Object ^] { Microsoft::SqlServer::Dts::Runtime::ExtendedProperty ^ get(System::Object ^ index); };

public Microsoft.SqlServer.Dts.Runtime.ExtendedProperty this[object index] { get; }

member this.Item(obj) : Microsoft.SqlServer.Dts.Runtime.ExtendedProperty

Default Public ReadOnly Property Item(index As Object) As ExtendedProperty

参数

属性值

集合中的 ExtendedProperty 对象。

示例

下面的代码示例使用两种方法从集合中检索项。 第一种方法使用 myExtProps[0] 语法检索位于集合的第一个位置的整个对象，并将其放置在对象中 myExtProp 。 现在可以像往常一样从 myExtProp 对象中检索所有属性。 第二种方法演示如何从集合中的第一个对象检索特定属性 DataType。

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

namespace ExtendedProperties_Testing  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            // The package is one of the SSIS samples.  
            string mySample = @"C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx";  
            // Create the application, and load the sample.  
            Application app = new Application();  
            Package pkg = app.LoadPackage(mySample, null);  

            // Get the extended properties collection from the package.  
            ExtendedProperties myExtProps = pkg.ExtendedProperties;  

            //Using the Item method syntax of [x], obtain the  
            // entire first entry, and then just the name.  
            ExtendedProperty myExtProp = myExtProps[0];  
            String dataTypeOfFirstItem = myExtProps[0].DataType.ToString();  

            //Print the name of the extended property   
           //located at position [0].  
            Console.WriteLine("The ID of the first item is: {0}", myExtProp.ID);  
            Console.WriteLine("The DataType of the first item is: {0}", dataTypeOfFirstItem);  
            Console.WriteLine();  
        }  
    }  
}  

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

Namespace ExtendedProperties_Testing  
    Class Program  
        Shared  Sub Main(ByVal args() As String)  
            ' The package is one of the SSIS samples.  
            Dim mySample As String =  "C:\Program Files\Microsoft SQL Server\100\Samples\Integration Services\Package Samples\CalculatedColumns Sample\CalculatedColumns\CalculatedColumns.dtsx"   
            ' Create the application, and load the sample.  
            Dim app As Application =  New Application()   
            Dim pkg As Package =  app.LoadPackage(mySample,Nothing)   

            ' Get the extended properties collection from the package.  
            Dim myExtProps As ExtendedProperties =  pkg.ExtendedProperties   

            'Using the Item method syntax of [x], obtain the  
            ' entire first entry, and then just the name.  
            Dim myExtProp As ExtendedProperty =  myExtProps(0)   
            Dim dataTypeOfFirstItem As String =  myExtProps(0).DataType.ToString()   

            'Print the name of the extended property   
           'located at position [0].  
            Console.WriteLine("The ID of the first item is: {0}", myExtProp.ID)  
            Console.WriteLine("The DataType of the first item is: {0}", dataTypeOfFirstItem)  
            Console.WriteLine()  
        End Sub  
    End Class  
End Namespace  

示例输出：

第一项的 ID 为：{F3B7314E-DB1E-4CCA-A856-2E617A1B3265}

第一项的 DataType 为：String

注解

如果对方法的 Contains 调用返回 true，则可以使用语法 ExtendedProperties[index]访问集合中的指定元素。 但是，如果 Contains 该方法返回 false，此属性将引发异常。 在 C# 中，此属性是 ExtendedProperties 类的索引器。

适用于