外接事件永远不会被执行

问题描述

我用添加为Visual Studio的向导来创建一个新的加载项项目，现在，我想添加一些事件处理程序：

I used the "Add-In for Visual Studio" wizard to create a new Addin project and now, I'm trying to add some event handlers:

public void OnConnection(object application, ext_ConnectMode connectMode, object addInInst, ref Array custom)
{
    _applicationObject = (DTE2)application;
    _addInInstance = (AddIn)addInInst;

    _applicationObject.Events.BuildEvents.OnBuildBegin += BuildEvents_OnBuildBegin;
    _applicationObject.Events.BuildEvents.OnBuildDone += BuildEvents_OnBuildDone;
    _applicationObject.Events.SelectionEvents.OnChange += SelectionEvents_OnChange;
    _applicationObject.Events.DocumentEvents.DocumentOpened += DocumentEvents_DocumentOpened;
    _applicationObject.Events.DocumentEvents.DocumentSaved += DocumentEvents_DocumentSaved;
}

不过，无论我做什么，我的处理程序是从不执行！

But whatever I do, my handlers are never executed!

我是不是瞎了？我必须做别的注册这些处理程序或者为什么不工作？

Am I blind? Do I have to do anything else to register these handlers or why doesn't it work?

推荐答案

好像你是一个受害者的垃圾收集器。请参阅：

Seems you're a victim of the Garbage Collector. See: http://www.mztools.com/articles/2005/mz2005012.aspx

 private readonly BuildEvents _buildEvents;
 private readonly SelectionEvents _selectionEvents;
 private readonly DocumentEvents _documentEvents;
 private readonly Events _events;

 public void OnConnection(object application, ext_ConnectMode connectMode, object addInInst, ref Array custom)
 {
     _applicationObject = (DTE2)application;
     _addInInstance = (AddIn)addInInst;
     _events = _applicationObject.Events;

     _buildEvents = _events.BuildEvents;
     _buildEvents.OnBuildBegin += BuildEvents_OnBuildBegin;
     _buildEvents.OnBuildDone += BuildEvents_OnBuildDone;

     _selectionEvents = _events.SelectionEvents;
     _selectionEvents.OnChange += SelectionEvents_OnChange;

     _documentEvents = _events.DocumentEvents;
     _documentEvents.DocumentOpened += DocumentEvents_DocumentOpened;
     _documentEvents.DocumentSaved += DocumentEvents_DocumentSaved;
 }

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