IHTMLDocument2 load from memory

**_hunter** · May 8th, 2007, 09:12 AM

Greetings...

I'm trying to load HTML from memory into the IHTMLDocument2:
(OnInitDialog)

Code:

	InfoStr = "<html><body><h1>test</h1></body></html>";

	CComVariant address("about:blank");
	internetExplorer.Navigate2(&address, NULL, NULL, NULL, NULL);

	LPDISPATCH documentDispatch = internetExplorer.get_Document();
	if (documentDispatch)
	{
		CComPtr<IHTMLDocument2> document;
		if (SUCCEEDED(documentDispatch->QueryInterface(__uuidof(IHTMLDocument2), (void**)&document)) && document)
		{
			CComPtr<IPersistStreamInit> persistStreamInit;
			if (SUCCEEDED(document->QueryInterface(__uuidof(IPersistStreamInit), (void**)&persistStreamInit)) && persistStreamInit)
			{
				if (SUCCEEDED(persistStreamInit->InitNew()))
				{
					TCHAR* memory = (TCHAR*)GlobalAlloc(GMEM_MOVEABLE, (InfoStr.GetLength() + 1)*sizeof(TCHAR));
					if (memory)
					{
						_tcscpy(memory, InfoStr.GetBuffer());
						memory[InfoStr.GetLength()] = 0;

						CComPtr<IStream> stream;
						if (CreateStreamOnHGlobal((HGLOBAL)memory, TRUE, &stream) == S_OK)
						{
							HRESULT result = persistStreamInit->Load(stream);
							bool stop = true;
						}
					}
				}
			}
		}
	}

(internetExplorer -- created by "Insert ActiveX Control" from "Microsoft Web Browser")
persistStreamInit->Load returns S_OK, but internetExplorer shows an empty page.
What's wrong here?

Best regards...

**blueday54555** · May 8th, 2007, 09:59 AM

Well try this

in your header

Code:

	void DisplayDirect(CString sHtml);
	HRESULT LoadHtmlFromStream(IStream* pStream);

Code:

void CHTMLDlg::DisplayDirect(CString sHtml)
{
	HRESULT hr;
	HGLOBAL hHTMLText;
	IStream* pStream = NULL;

	hHTMLText = GlobalAlloc( GPTR, sHtml.GetLength()+1 );
	if (hHTMLText) {
		lstrcpy((char*)hHTMLText, sHtml);
		hr = CreateStreamOnHGlobal(hHTMLText, TRUE, &pStream );
			if (SUCCEEDED(hr)) {
				LoadHtmlFromStream(pStream);
				pStream->Release();
			}
	}
}

HRESULT CHMTLDlg::LoadHtmlFromStream(IStream* pStream)
{
	HRESULT hr;
	IDispatch* pHtmlDoc = NULL;
	IPersistStreamInit* pPersistStreamInit = NULL;

	internetExplorer.Navigate( _T("about:blank"), NULL, NULL, NULL, NULL );
	pHtmlDoc = internetExplorer.GetDocument(); // m_WebBrowser is your control
	
	if (pHtmlDoc) 
	{
		pHtmlDoc->QueryInterface( IID_IPersistStreamInit, (void**)&pPersistStreamInit );
		pPersistStreamInit->InitNew();
		pPersistStreamInit->Load( pStream );
		pPersistStreamInit->Release();
	}
	return hr;
}

usage

Code:

DisplayDirect("<html><body><h1>test</h1></body></html>");

**goremo** · July 24th, 2007, 08:07 AM

I have been studying how to use c++ to display HTML in a window. After looking at what msdn had, I found reliable samples at
1. http://www.adp-gmbh.ch/win/misc/mshtml/HTMLWindow.html and
2. http://www.codeproject.com/com/cwebpage.asp

The samples should privide some examples.

But can someone solve the problem below:

I compliled both codes and they work... but fails in other PCs.
Compliled in Window 2000 server on Vb. Net 2003.

Known PCs to work:
xp
Not working on:
Windows 2000 professional

I could not find other platforms to test.

When I trace HTMLWindow(René Nyffenegger) codes, it seems to fail at HTMLWindow.cpp/long HTMLWindow::HTML(std::string const& html_txt)/if (!lpDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&htmlDoc2))

So far I have not traced SimpleBrowserDemo(Jeff Glatt). But the compiled application seem to work where the above is working and vise-versa.

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