我正在开发一个可视化 C++ 应用程序(x64)。实际上我想做的是假设我们在窗口资源管理器中有一个 html 文件(我的意思是文件扩展名为“.html”的文件)。当我们单击它时,我们会在预览窗格中获得它的预览(因此我们不需要打开此文件,只需单击文件即可在预览窗格中看到该文件)。
我开发了一种类似类型的应用程序,但在我的情况下,当我单击“html 文件”时,我只是在预览窗格中获取该 html 文件的代码(如果您在记事本中打开该 html 文件,您可以看到该代码)。这预计不会发生,但我想预览那个“html 文件”而不是那个 html 文件的代码。
我想我需要托管一些浏览器控件,它将我在预览窗格中的 html 代码转换为 html 文件的显示(如果我是正确的???)怎么做?
这是我的代码-
IHTMLDocument2 * pDoc=NULL;
HRESULT hr2 = CoCreateInstance(CLSID_HTMLDocument, NULL, CLSCTX_INPROC_SERVER, IID_IHTMLDocument2, (LPVOID *) &pDoc);
if (pDoc)
{
IPersistStreamInit *pPersist = NULL;
pDoc->QueryInterface(IID_IPersistStreamInit,(LPVOID *) &pPersist);
if (pPersist)
{
IMarkupServices *pMS = NULL;
pPersist->InitNew();
pPersist->Release();
pDoc->QueryInterface(IID_IMarkupServices,(LPVOID *) &pMS);
if (pMS)
{
IMarkupContainer *pMC = NULL;
IMarkupPointer *pMkStart = NULL;
IMarkupPointer *pMkFinish = NULL;
pMS->CreateMarkupPointer(&pMkStart);
pMS->CreateMarkupPointer(&pMkFinish);
pMS->ParseString(HtmlFileContents,0,&pMC,pMkStart,pMkFinish);
//this HtmlFileContents is actually a buffer of olechar type which contains the code of html file (the code which you see when you open the html file in notepad)
if (pMC)
{
IHTMLDocument2 *pNewDoc = NULL;
pMC->QueryInterface(IID_IHTMLDocument,(LPVOID *) &pNewDoc);
if (pNewDoc)
{
IHTMLElement *pBody;
pNewDoc->get_body(&pBody);
if (pBody)
{
BSTR strText;
pBody->get_innerText(&strText);
hr = instance->CreatePreviewWindowForHtml(strText); // this function is responsible for displaying the html file in window. you can see its definition below after this code.
SysFreeString(strText);
pBody->Release();
}
pNewDoc->Release();
}
pMC->Release();
}
if (pMkStart)
pMkStart->Release();
if (pMkFinish)
pMkFinish->Release();
pMS->Release();
pMS->Release();
}
}
pDoc->Release();
}
return true;
and the function defintion of CreatePreviewWindowForHtml() is as below-
CreatePreviewWindowForHtml(PCWSTR pszRtfWide)
{
assert(m_hwndPreview3 == NULL);
HRESULT hr = E_FAIL;
if (m_hwndPreview3 == NULL)
{
HRESULT hr5 = HRESULT_FROM_WIN32(GetLastError());
}
if (m_hinstEditLibrary == NULL)
{
// MSFTEDIT_CLASS used below comes from this binary
m_hinstEditLibrary = LoadLibraryW(L"msftedit.dll");
}
if (m_hinstEditLibrary == NULL)
{
hr = HRESULT_FROM_WIN32(GetLastError());
}
else
{
// Create the preview window
HWND pr = m_hwndPreview3 = CreateWindowExW(0, MSFTEDIT_CLASS, NULL,
WS_CHILD | WS_VSCROLL | WS_VISIBLE | ES_MULTILINE | ES_READONLY, // Always create read-only
m_rcParent.left, m_rcParent.top, RECTWIDTH(m_rcParent), RECTHEIGHT(m_rcParent),
m_hwndPreview, NULL, NULL,NULL);
if (m_hwndPreview3 == NULL)
{
MessageBoxA(m_hwndPreview3,strerror(hr),"BTN WND2", MB_ICONINFORMATION);
}
else
{
int const cchRtf = 1 + wcslen(pszRtfWide);
PSTR pszRtf = (PSTR)CoTaskMemAlloc(cchRtf);
if (pszRtf)
{
WideCharToMultiByte(CP_ACP, 0, pszRtfWide, cchRtf, pszRtf, cchRtf, NULL, NULL);
SETTEXTEX st = { ST_DEFAULT, CP_ACP };
LRESULT hr4=SendMessage(m_hwndPreview3, EM_SETTEXTEX, (WPARAM) &st, (LPARAM) pszRtfWide);
if (SUCCEEDED(hr4))
{
hr = AdjustDialogPositionAndSize();
SendMessage(m_hwndPreview3, EM_SETTEXTEX, (WPARAM) &st, (LPARAM) pszRtfWide);
}
CoTaskMemFree(pszRtf);
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
}
}
}
return hr;
}
任何想法为什么我的窗口中有 html 代码?在代码中做什么才能在我的窗口中预览 html 文件而不是 html 代码?如果对理解我有任何疑问,请告诉我??