MEF 问题 - ExportFactory- 调用Dispose方法
如果可能的话，对使用 ExportFactory 创建的对象调用 dispose 方法？
工厂在这里：
public interface IViewModelsControler
{
IChatViewModel CreatChatViewModel();
}
[Export(typeof(IViewModelsControler))]
public class ViewModelsControler:IViewModelsControler
{
[Import]
public ExportFactory<IChatViewModel> ChatViewFactory { get; set; }
public IChatViewModel CreatChatViewModel()
{
return ChatViewFactory.CreateExport().Value;
}
}
创建对象：
var chatScreen = ViewModelControler.CreatChatViewModel();
我想调用 chatScreen.Dispose()。
ChatViewModel 调用如下所示：
[Export(typeof(IChatViewModel))]
[PartCreationPolicy(CreationPolicy.NonShared)]
public class ChatViewModel : Screen, IChatViewModel
{}
If possible call dispose method on object which is created with ExportFactory?
Factory is here:
public interface IViewModelsControler
{
IChatViewModel CreatChatViewModel();
}
[Export(typeof(IViewModelsControler))]
public class ViewModelsControler:IViewModelsControler
{
[Import]
public ExportFactory<IChatViewModel> ChatViewFactory { get; set; }
public IChatViewModel CreatChatViewModel()
{
return ChatViewFactory.CreateExport().Value;
}
}
Creation of object:
var chatScreen = ViewModelControler.CreatChatViewModel();
I would like call chatScreen.Dispose().
ChatViewModel call look like this:
[Export(typeof(IChatViewModel))]
[PartCreationPolicy(CreationPolicy.NonShared)]
public class ChatViewModel : Screen, IChatViewModel
{}
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评论（2）
您应该对调用 CreateExport() 返回的 ExportLifetimeContext 调用 dispose，而不是对导出的值本身调用 dispose。这不仅会处理 ViewModelController，还会处理任何为满足其导入而创建的非共享一次性部件。
You should call dispose on the ExportLifetimeContext returned by the call to CreateExport(), not on the exported value itself. This will dispose not just the ViewModelController, but any NonShared disposable parts that were created to satisfy its imports.
您的 chatScreen 合约需要公开 Dispose() 方法。
这是关于垃圾收集的另一个答案（如果这就是您所追求的）。
Your contract for chatScreen needs to expose the Dispose() method.
Here is another answer regarding garbage collection if that is what you are after.