VBProjectsEvents在哪里？

Question

Microsoft.Vbe.Interop在C#中使用,我可以访问CommandBarEvents和ReferencesEvents通过VBE.Events.

然而,那些非常有用的MSDN文档似乎表明,VBProjectsEvents当向VBE添加项目或从VBE中删除项目时,我可以使用它来通知我的加载项...这正是我在这里想要实现的.

我可以_VBProjectsEvents在对象浏览器中看到该接口,但没有实现它(而不是_CommandBarControlsEvents接口,由它实现CommandBarEventsClass),使用ReSharper的实现功能.

在_VBProjectsEvents任何地方都有接口的实现吗？如果没有,那么如何通知从VB中删除VBProject？

Answer 1

您需要为这些事件创建一个接收器。

实现_dispVBProjectsEvents调度接口 - 这是一个通过调用常规托管 .net 事件来响应这些事件的实现，有效地“包装”事件VBProjects：

public class VBProjectsEventsSink : _dispVBProjectsEvents
{
    public event EventHandler<DispatcherEventArgs<VBProject>> ProjectAdded;
    public void ItemAdded(VBProject VBProject)
    {
        if (VBProject.Protection == vbext_ProjectProtection.vbext_pp_none)
        {
            OnDispatch(ProjectAdded, VBProject);
        }
    }

    public event EventHandler<DispatcherEventArgs<VBProject>> ProjectRemoved;
    public void ItemRemoved(VBProject VBProject)
    {
        if (VBProject.Protection == vbext_ProjectProtection.vbext_pp_none)
        {
            OnDispatch(ProjectRemoved, VBProject);
        }
    }

    public event EventHandler<DispatcherRenamedEventArgs<VBProject>> ProjectRenamed;
    public void ItemRenamed(VBProject VBProject, string OldName)
    {
        var handler = ProjectRenamed;
        if (handler != null && VBProject.Protection == vbext_ProjectProtection.vbext_pp_none)
        {
            handler.Invoke(this, new DispatcherRenamedEventArgs<VBProject>(VBProject, OldName));
        }
    }

    public event EventHandler<DispatcherEventArgs<VBProject>> ProjectActivated;
    public void ItemActivated(VBProject VBProject)
    {
        if (VBProject.Protection == vbext_ProjectProtection.vbext_pp_none)
        {
            OnDispatch(ProjectActivated, VBProject);
        }
    }

    private void OnDispatch(EventHandler<DispatcherEventArgs<VBProject>> dispatched, VBProject project)
    {
        var handler = dispatched;
        if (handler != null)
        {
            handler.Invoke(this, new DispatcherEventArgs<VBProject>(project));
        }
    }
}

该类DispatcherEventArgs只是公开VBProject事件涉及的项目的一种便捷方式，并且可以重用于其他接收器：

public class DispatcherEventArgs<T> : EventArgs 
    where T : class
{
    private readonly T _item;

    public DispatcherEventArgs(T item)
    {
        _item = item;
    }

    public T Item { get { return _item; } }
}

客户端代码需要注册接收器 - 为此，您需要保留一个IConnectionPoint字段及其intcookie：

private readonly IConnectionPoint _projectsEventsConnectionPoint;
private readonly int _projectsEventsCookie;

该VBProjects集合实现了IConnectionPointContainer接口，您需要使用该接口来查找连接点：

var sink = new VBProjectsEventsSink();
var connectionPointContainer = (IConnectionPointContainer)_vbe.VBProjects;
var interfaceId = typeof (_dispVBProjectsEvents).GUID;
connectionPointContainer.FindConnectionPoint(ref interfaceId, out _projectsEventsConnectionPoint);

一旦你有了IConnectionPoint，使用该Advise方法“连接”你的接收器并检索cookie：

_projectsEventsConnectionPoint.Advise(sink, out _projectsEventsCookie);

然后您可以像处理任何“正常”.net 事件一样处理接收器事件：

sink.ProjectAdded += sink_ProjectAdded;
sink.ProjectRemoved += sink_ProjectRemoved;
sink.ProjectActivated += sink_ProjectActivated;
sink.ProjectRenamed += sink_ProjectRenamed;

当您想要断开接收器的连接时，可以将cookie传递给实例Unadvise的方法IConnectionPoint：

_projectsEventsConnectionPoint.Unadvise(_projectsEventsCookie);

“就那么简单！”