Outlook 插件：DispEventAdvise 异常

Question

我想创建一个插件来捕获{联系人、日历、任务、注释}的{创建、编辑、删除}时间。我有以下代码，为了使其更短，我删除了除与联系人相关的所有代码，因为我猜所有类型都是相同的。

AutoSync.h

class ATL_NO_VTABLE AutoSync : 
 public wxPanel,
 public IDispEventSimpleImpl<1, AutoSync, &__uuidof(Outlook::ItemsEvents)>,
 public IDispEventSimpleImpl<2, AutoSync, &__uuidof(Outlook::ItemsEvents)>,
 public IDispEventSimpleImpl<3, AutoSync, &__uuidof(Outlook::ItemsEvents)>
{
public:
 AutoSync();
 ~AutoSync();

 void __stdcall OnItemAdd(IDispatch* Item); /* 0xf001 */
 void __stdcall OnItemChange(IDispatch* Item); /* 0xf002 */ 
 void __stdcall OnItemRemove(); /* 0xf003 */

 BEGIN_SINK_MAP(AutoSync)
  SINK_ENTRY_INFO(1, __uuidof(Outlook::ItemsEvents), 0xf001, OnItemAdd, &OnItemsAddInfo)
  SINK_ENTRY_INFO(2, __uuidof(Outlook::ItemsEvents), 0xf002, OnItemChange, &OnItemsChangeInfo)
  SINK_ENTRY_INFO(3, __uuidof(Outlook::ItemsEvents), 0xf003, OnItemRemove, &OnItemsRemoveInfo)
 END_SINK_MAP()

 typedef IDispEventSimpleImpl<1, AutoSync, &__uuidof(Outlook::ItemsEvents)> ItemAddEvents;
 typedef IDispEventSimpleImpl<2, AutoSync, &__uuidof(Outlook::ItemsEvents)> ItemChangeEvents;
 typedef IDispEventSimpleImpl<3, AutoSync, &__uuidof(Outlook::ItemsEvents)> ItemRemoveEvents;

    private:

    CComPtr<Outlook::_Items> m_contacts;

    };

AutoSync.cpp

 _NameSpacePtr pMAPI = OutlookWorker::GetInstance()->GetNameSpacePtr();


MAPIFolderPtr pContactsFolder = NULL;
 HRESULT hr = NULL;

 //get folders
 if(pMAPI != NULL) {
  pMAPI->GetDefaultFolder(olFolderContacts, &pContactsFolder);
 }

 //get items
 if(pContactsFolder != NULL) pContactsFolder->get_Items(&m_contacts);

 //dispatch events
 if(m_contacts != NULL) {
    //HERE COMES THE EXCEPTION
  hr = ItemAddEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));
  hr = ItemChangeEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));
  hr = ItemRemoveEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));
 }

在其他地方定义：

extern _ATL_FUNC_INFO OnItemsAddInfo;
extern _ATL_FUNC_INFO OnItemsChangeInfo;
extern _ATL_FUNC_INFO OnItemsRemoveInfo;
_ATL_FUNC_INFO OnItemsAddInfo = {CC_STDCALL,VT_EMPTY,1,{VT_DISPATCH}};
_ATL_FUNC_INFO OnItemsChangeInfo = {CC_STDCALL,VT_EMPTY,1,{VT_DISPATCH}};
_ATL_FUNC_INFO OnItemsRemoveInfo = {CC_STDCALL,VT_EMPTY,0};

问题出现

    hr = ItemAddEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));
  hr = ItemChangeEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));
  hr = ItemRemoveEvents::DispEventAdvise((IDispatch*)m_contacts,&__uuidof(Outlook::ItemsEvents));

在执行方法“Advise”时，它在“atlbase.inl”中给出异常：

ATLINLINE ATLAPI AtlAdvise(IUnknown* pUnkCP, IUnknown* pUnk, const IID& iid, LPDWORD pdw)
{
 if(pUnkCP == NULL)
  return E_INVALIDARG;

 CComPtr<IConnectionPointContainer> pCPC;
 CComPtr<IConnectionPoint> pCP;
 HRESULT hRes = pUnkCP->QueryInterface(__uuidof(IConnectionPointContainer), (void**)&pCPC);
 if (SUCCEEDED(hRes))
  hRes = pCPC->FindConnectionPoint(iid, &pCP);
 if (SUCCEEDED(hRes))
    //HERE GIVES EXCEPTION
    //Unhandled exception at 0x2fe913e3 in OUTLOOK.EXE: 0xC0000005: 
    //Access violation reading location 0xcdcdcdcd.
  hRes = pCP->Advise(pUnk, pdw);
 return hRes;
}

我无法理解为什么。这里有什么建议吗？一切似乎都很好，但显然并非如此。我已经被困在这里很长一段时间了。需要你的帮助，谢谢。

Answer 1

快速浏览后的第一个事实是，您只需要从每个接口派生一个 IDispEventSimpleImpl - 您不需要为接口中的每个方法派生一个：

class ATL_NO_VTABLE AutoSync : 
  public wxPanel,
  public IDispEventSimpleImpl<1, AutoSync, &__uuidof(Outlook::ItemsEvents)>
{
public:
  // ...
  BEGIN_SINK_MAP(AutoSync)
    SINK_ENTRY_INFO(1, __uuidof(Outlook::ItemsEvents), 0xf001, OnItemAdd, &OnItemsAddInfo)
    SINK_ENTRY_INFO(1, __uuidof(Outlook::ItemsEvents), 0xf002, OnItemChange, &OnItemsChangeInfo)
    SINK_ENTRY_INFO(1, __uuidof(Outlook::ItemsEvents), 0xf003, OnItemRemove, &OnItemsRemoveInfo)
  END_SINK_MAP()

  typedef IDispEventSimpleImpl<1, AutoSync, &__uuidof(Outlook::ItemsEvents)> ItemAddEvents;
  // ...
};

再尝试一次简化。

Answer 2

我遇到了类似的问题，原因是我从构造函数中调用虚拟方法。如果您的问题代码位于构造函数中，请尝试将其移至 FinalConstruct()。

Answer 3

我曾经遇到过这个异常，删除 ATL_NO_VTABLE 可以修复它。