ExportFactory Class

Definition

generic 
public ref class ExportFactory

public class ExportFactory

type ExportFactory<'T> = class

Public Class ExportFactory(Of T)

Type Parameters

Inheritance

Object

ExportFactory

Derived

System.ComponentModel.Composition.ExportFactory

Remarks

When you refer indirectly to a part by using a Lazy object, the Value property always returns a reference to the same object. In some circumstances, you might want each reference to result in the creation of a new object. ExportFactory is designed for those scenarios.

ExportFactory can be used in a similar fashion to Lazy when creating attributed parts. That is, an import contract that is defined on ExportFactory with a generic parameter of T will match an export that is defined on T. For example, the follow export and import match:

[Export]
public String myData = "Example Data.";

[Import]
public ExportFactory theData { get; set; }

Public myData As String = "Example Data."


Public Property theData As ExportFactory(Of String)

The ExportFactory.CreateExport method returns an ExportLifetimeContext object, which has two pieces. The ExportLifetimeContext.Value property provides access to the created part. Calling the Dispose method of the ExportLifetimeContext object cleans up the created part and all of its dependencies, thereby allowing the part's lifetime to be managed without reference to the container that created it.