ExtendedProperties.Item 屬性
Gets an ExtendedProperty object from the collection.
命名空間： Microsoft.SqlServer.Dts.Runtime
組件： Microsoft.SqlServer.ManagedDTS (在 Microsoft.SqlServer.ManagedDTS.dll 中)
語法
'宣告
Public ReadOnly Default Property Item ( _
index As Object _
) As ExtendedProperty
Get
'用途
Dim instance As ExtendedProperties
Dim index As Object
Dim value As ExtendedProperty
value = instance(index)
public ExtendedProperty this[
Object index
] { get; }
public:
property ExtendedProperty^ default[Object^ index] {
ExtendedProperty^ get (Object^ index);
}
member Item : ExtendedProperty
JScript 支援索引屬性的使用，但不支援新屬性的宣告。
參數
- index
型別：System.Object
The name, description, ID, or index of the ExtendedProperty object to return.
屬性值
型別：Microsoft.SqlServer.Dts.Runtime.ExtendedProperty
An ExtendedProperty object from the collection.
備註
If the call to the Contains method returns true, you can access the specified element in the collection by using the syntax ExtendedProperties[index]. However, if the Contains method returns false, this property throws an exception. In C#, this property is the indexer for the ExtendedProperties class.
範例
The following code sample retrieves an item from the collection using two methods. The first method uses the myExtProps[0] syntax to retrieve the entire object located in the first position of the collection and place it in the myExtProp object. You can now retrieve all properties from the myExtProp object as usual. The second method demonstrates how to retrieve a specific property, DataType, from the first object in the collection.
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
Sample Output:
The ID of the first item is: {F3B7314E-DB1E-4CCA-A856-2E617A1B3265}
The DataType of the first item is: String