调试时Visual Studio包Initialize方法不调用

时间:2011-08-30 17:59:23

标签: c# visual-studio-2010 mef

目前,我正在使用MEF开发Visual Studio 2010的扩展,我需要初始化我的全局状态。我正在尝试在Package.Initialize方法

中执行此操作
[PackageRegistration(UseManagedResourcesOnly = true)]
[InstalledProductRegistration("#110", "#112", "1.0.0.0", IconResourceID = 400)]
[Guid("1AF4B41B-F2DF-4F49-965A-816A103ADFEF")]
public sealed class MyPackage : Package
{

    protected override void Initialize()
    {
        ContainerConfigurator.Configure();
        ContainerConfigurator.IsInitialized = true;
        base.Initialize();
    }
}

此外,我还有一个使用此状态的MEF分类器提供程序

[Export(typeof(IClassifierProvider))]
[Name("This is my provider")]
[ContentType("DebugOutput")]
[ContentType("Output")]
public class MyClassifierProvider : IClassifierProvider
{
    [Import]
    private IClassificationTypeRegistryService _classificationRegistry = null; // MEF

    public IClassifier GetClassifier(ITextBuffer textBuffer)
    {
        // This always false
        if (!ContainerConfigurator.IsInitialized)
           throw new InvalidOperationException();

        return textBuffer.Properties.GetOrCreateSingletonProperty(() => new TypedClassifier(ServiceLocator.Current, _classificationRegistry));
    }
}

package和MEF分类器都在同一个程序集中。当我开始调试并放置一个断点时,我看到这个组件被加载了。但MyClassifierProvider已在MyPackage.Initialize调用之前初始化。因此,在启动任何MEF组件之前,我无法初始化我的全局状态。任何人都可以解释为什么以及如何避免这种行为?

由于

1 个答案:

答案 0 :(得分:20)

我找到了答案。有必要添加ProvideAutoLoad属性

http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.vsconstants(v=vs.80).aspx

http://dotneteers.net/blogs/divedeeper/archive/2008/03/23/LVNSideBar1.aspx

所以最后的类声明是

[PackageRegistration(UseManagedResourcesOnly = true)]
[InstalledProductRegistration("#110", "#112", "1.0.0.0", IconResourceID = 400)]
[Guid("1AF4B41B-F2DF-4F49-965A-816A103ADFEF")]
[ProvideAutoLoad("ADFC4E64-0397-11D1-9F4E-00A0C911004F")]
public sealed class MyPackage : Package