c# - 如何初始化 MEF ServiceLocator.Current？

Question

在我的 App.xaml.cs 中有

private void InitializeContainer()
{
    var catalogs = new AggregateCatalog();

    var catalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
    catalogs.Catalogs.Add(catalog);

    // Also adding Interactions project
    catalog = new AssemblyCatalog(typeof(InteractionsService).Assembly);
    catalogs.Catalogs.Add(catalog);

    // initialize the main application composition host (container) 
    CompositionHost.Initialize(catalogs);
} 

但是，当我尝试像这样在一行中初始化对象时:

this.InteractionsService = ServiceLocator.Current.GetInstance<IInteractionsService>();

我的 ServiceLocator.Current 为空时出现异常。

如何让它发挥作用？

Answer 1

我有同样的问题..

并发现这可能有帮助，

http://www.itwox.com/post/Using-MEF-with-Common-Service-Locator.aspx

关键语句是

ServiceLocator.SetLocatorProvider(() => 无论你的定位器实例是什么);