Question

Explorer对象发生事件的原因可能是什么？我正在使用下面的简单代码，只是为所有Explorer个对象注册事件。我总是在调试窗口中获取Init new Explorer!行一次，因此有一个Explorer对象。当我在Outlook中单击时，从邮件切换到日历视图，选择项目，切换回，切换到联系人，...我只得到一些（！）的第一个事件，而不是确定性的哪个事件。几秒钟之后，尽管仍然保持点击和更改视图，但我没有获得更多活动。这有什么不对？

private void ThisAddInStartup(object sender, System.EventArgs e)
{
    foreach (var exp in this.Application.Explorers)
    {
        this.ExplorersOnNewExplorer(exp as Explorer);
    }
    this.Application.Explorers.NewExplorer += this.ExplorersOnNewExplorer;
}

private void ExplorersOnNewExplorer(Explorer currentExplorer)
{
    Debug.WriteLine("Init new Explorer!");

    currentExplorer.BeforeViewSwitch += this.CurrentExplorerOnBeforeViewSwitch;
    currentExplorer.BeforeFolderSwitch += this.CurrentExplorerOnBeforeFolderSwitch;
    currentExplorer.SelectionChange += this.CurrentExplorerOnSelectionChange;
    currentExplorer.ViewSwitch += this.CurrentExplorerOnFolderSwitch;
    currentExplorer.FolderSwitch += this.CurrentExplorerOnFolderSwitch;
}
private void CurrentExplorerOnBeforeFolderSwitch(object newFolder, ref bool cancel)
{
    Debug.WriteLine("BeforeFolderSwitch!");
}

private void CurrentExplorerOnBeforeViewSwitch(object newView, ref bool cancel)
{
    Debug.WriteLine("BeforeViewSwitch!");
}

private void CurrentExplorerOnFolderSwitch()
{
    Debug.WriteLine("CurrentExplorerOnFolderOrViewSwitch!");
}

private void CurrentExplorerOnSelectionChange()
{
    Debug.WriteLine("Selection changed!");
}

Answer 1

触发事件的对象必须保持活动状态。在您的情况下，您在作为参数传递的对象上设置事件处理程序。一旦超出范围，它就会被释放，并且不会发生任何事件。必须在课程级别声明Explorers和Explorer。

您可能还想跟踪Explorer.Close事件，以从正在观看的对象列表中删除Explorer对象。

private List<Explorer> _explorers = new List<Explorer>();
private Explorer explorer;
private void ThisAddInStartup(object sender, System.EventArgs e)
{
    _explorers = this.Application.Explorers;
    foreach (var exp in _explorers)
    {
        this.ExplorersOnNewExplorer(exp as Explorer);
    }
    _explorers.NewExplorer += this.ExplorersOnNewExplorer;
}

private void ExplorersOnNewExplorer(Explorer currentExplorer)
{
    _explorers.Add(currentExplorer);
    Debug.WriteLine("Init new Explorer!");

    currentExplorer.BeforeViewSwitch += this.CurrentExplorerOnBeforeViewSwitch;
    currentExplorer.BeforeFolderSwitch += this.CurrentExplorerOnBeforeFolderSwitch;
    currentExplorer.SelectionChange += this.CurrentExplorerOnSelectionChange;
    currentExplorer.ViewSwitch += this.CurrentExplorerOnFolderSwitch;
    currentExplorer.FolderSwitch += this.CurrentExplorerOnFolderSwitch;
}

Outlook 2013 VSTO - 不会触发当前资源管理器的事件

1 个答案: