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copied!<p>Looks like I made the original post as an unregistered user, so I don't think I can edit it. We were able to work around the original issue, but it came up again in a different context (really starting to hate CDHTMLDialog).</p> <p><strong>Here is the cause of the problem:<br></strong> Javascript calls are causing a Navigate event, and CDHtmlDialog::OnBeforeNavigate gets called and disconnects and deletes the IHTMLDocument2. Unfortunately it's not a true Navigate since the page never changed. This means CDHtmlDialog::OnNavigateComplete is never called to get the document back.</p> <p>To make matters worse, when I override CDHtmlDialog::OnBeforeNavigate I find the URL string is unreadable (bug)?</p> <p><strong>The simplest (best?) solution:<br></strong> We need to intercept the Before Navigate event, and only call the CDHtmlDialog's _OnBeforeNavigate2 if the URL isn't a javascript action:</p> <pre><code>BEGIN_EVENTSINK_MAP(CMyHTMLDlg, CDHtmlDialog) ON_EVENT(CMyHTMLDlg, AFX_IDC_BROWSER, DISPID_BEFORENAVIGATE2, OnBeforeNavigate2, VTS_DISPATCH VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_PBOOL) END_EVENTSINK_MAP() void CMyHTMLDlg::OnBeforeNavigate2(LPDISPATCH pDisp, VARIANT* URL,VARIANT* Flags, VARIANT* TargetFrameName, VARIANT* PostData,VARIANT* Headers, BOOL* Cancel) { ... if (URL != NULL) { // Check if navigation is to a folder.. CString url = CString(*URL); if(url.Left(11) != _T("javascript:")) { _OnBeforeNavigate2(pDisp, URL, Flags, TargetFrameName, PostData, Headers, (BOOL*)Cancel); // If dynamic linking MFC then the above handler doesn't exist. Need to call OnBeforeNavigate direct. // This is from a code site, and it compiles, but I've never tested it to see if it works. //CDHtmlDialog::OnBeforeNavigate(pDisp,(LPCSTR)URL); } } } </code></pre> <p>Most of this is pretty standard for setting up a CDHtmlDialog subclass, and it's pretty simple actually, but it took me a bit to figure out how to handle JavaScript. Unfortunately, I'm not sure how this will work if the JavaScript is making dynamic changes to the page itself.</p> <p><strong>A couple notes:</strong><br></p> <ul> <li>If the navigation needs to be completely canceled here, then set *Cancel = TRUE and don't call _OnBeforeNavigate2. Be careful here because this also cancels any JavaScript actions.</li> <li>It wasn't clear until I saw the <a href="http://sslsnap02.tamu.edu/EXCHANGE/A/VS.net2003/VSPROD1/Program%20Files/Microsoft%20Visual%20Studio%20.NET%202003/Vc7/atlmfc/src/mfc/dlgdhtml.cpp" rel="nofollow noreferrer">source</a>, but CDHtmlDialog::_OnBeforeNavigate2 just calls CDHtmlDialog::OnBeforeNavigate.</li> </ul>

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