ExtendedProperties.Item Property

Artikkeli
12/03/2008

Returns an ExtendedProperty object from the collection.

Namespace: Microsoft.SqlServer.Dts.Runtime
Assembly: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Syntax

'Declaration
Public ReadOnly Default Property Item ( _
    index As Object _
) As ExtendedProperty

public ExtendedProperty this [
    Object index
] { get; }

public:
property ExtendedProperty^ default [Object^] {
    ExtendedProperty^ get (Object^ index);
}

/** @property */
public ExtendedProperty get_Item (Object index)

Parameters

index
The name, description, ID, or index of the ExtendedProperty object to return.

Property Value

An ExtendedProperty object.

Remarks

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.

Example

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\90\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\90\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

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms