A problem about CHtmlView::Navigate2

From:

=?Utf-8?B?VG9tIExlZQ==?= <Tom.Lee@community.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 7 Aug 2007 21:22:01 -0700

Message-ID:

<BC70C71D-74E5-4133-850A-E2E1FC0EB120@microsoft.com>

I found if I call the CHtmlView::Navigate2 very quickly, it will hang the
process.

I made a tiny MDI application to verify this problem. The CTestHVViewis
derived from CHtmlView.
In the application, I created a timer on CTestHVView::OnInitialUpdate, and
call Navigate2 to a xml file in the OnTimer function.

The application will will hang. From the call stack, it is hanged in
msxml3.dll.

Here is some codes for reference:
class CTestHVView : public CHtmlView
{
....
protected:
    vector<CString> m_vctFullPath;
    vector<CString>::iterator m_curIter;
....
};

void CTestHVView::OnInitialUpdate()
{
    CHtmlView::OnInitialUpdate();

    //Get the XML files full path and put them into a vector.
    TCHAR szPath[MAX_PATH*4];
    ZeroMemory(szPath, MAX_PATH*4);
    GetCurrentDirectory(MAX_PATH*4, szPath);
    CString csDir(szPath);
    csDir += _T("\\XML\\");
    CString csTmp(csDir+_T("*.xml"));

    WIN32_FIND_DATA FindFileData;
    HANDLE hFind;
    hFind = FindFirstFile(csTmp, &FindFileData);
    if (INVALID_HANDLE_VALUE == hFind)
    {
        return;
    }

    OutputDebugString(_T("++++++++Use the following XML to test+++++++\n"));
    do{
        m_vctFullPath.push_back(csDir+FindFileData.cFileName);
        OutputDebugString(csDir+FindFileData.cFileName+_T("\n"));
    }while(FindNextFile(hFind, &FindFileData));
    FindClose(hFind);
    OutputDebugString(_T("++++++++Use the above XML to test+++++++\n"));

    m_curIter = m_vctFullPath.begin();
    this->SetTimer(1, 10, NULL);
}

void CTestHVView::OnTimer(UINT nIdEvent)
{
    static int nMax = 1000;
    static int i = 0;
    if (++i > nMax)
    {
        KillTimer(1);
        i = 0;
        return;
    }
    if (0 == m_vctFullPath.size())
    {
        KillTimer(1);
        i = 0;
        return;
    }
    if (m_curIter == m_vctFullPath.end())
    {
        m_curIter = m_vctFullPath.begin();
    }
    this->Navigate2(*m_curIter, NULL, NULL);
    CString cs;
    cs.Format(_T("i = %d, Navigate2 %s\n"), i, *m_curIter);
    OutputDebugString(cs);
    m_curIter++;
}

//Use this function to tigger the nvaigate2 again.
void CTestHVView::OnRunAgain()
{
    SetTimer(1, 10, NULL);
}

Any comments are very appreciated!
Thanks,

--
Tom Lee