使用IHTMLDocument2分析Html
http://hi.baidu.com/ahstudy2010/blog/item/102d7df3468f3ca4a40f52be.html
利用CWebBrowser2获取IHTMLDocument2接口,IHTMLDocument2接口是mshtml中最重要的接口之一,取得这个接口,就可以开始分析html代码
下面的代码将获取特定的html 文本标签
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
// 从ctlBrowser当前html文档选中区域中获取名为strTagName的标签,存入*ppElement中
BOOL GetCrntHtmlElement(CWebBrowser2 &ctlBrowser, const CString &strTagName, IHTMLElement **ppElement)
{
*ppElement = NULL; // initial as NULL
CString strText;
CComBSTR cbsText, cbsTagName;
CComPtr<IHTMLTxtRange> spTxtRange = NULL;
static CString SELECTTION_TYPE_TEXT = _T("text");
static CString SELECTTION_TYPE_CONTROL = _T("control");
static CString SELECTTION_TYPE_NONE = _T("none");
try
{
// calculate the first control based on the user selection
HRESULT hr = E_FAIL;
CComPtr<IDispatch> spDispDoc = ctlBrowser.get_Document();
CComPtr<IHTMLDocument2> spHtmlDoc = NULL;
hr = spDispDoc->QueryInterface(IID_IHTMLDocument2, (void**)&spHtmlDoc);
if (FAILED(hr) || NULL == spHtmlDoc)
{
return FALSE;
}
CComPtr<IHTMLSelectionObject> spSelection = NULL;
hr = spHtmlDoc->get_selection(&spSelection);
if(SUCCEEDED(hr) && spSelection)
{
hr = spSelection->get_type(&cbsText);
strText = cbsText;
if (0 == strText.CompareNoCase(SELECTTION_TYPE_TEXT)
|| 0 == strText.CompareNoCase(SELECTTION_TYPE_NONE) )
{
CComPtr<IDispatch> spTextRangeDisp = NULL;
hr = spSelection->createRange(&spTextRangeDisp);
if(SUCCEEDED(hr) && spTextRangeDisp)
{
hr = spTextRangeDisp->QueryInterface(IID_IHTMLTxtRange, (void**)&spTxtRange);
if(SUCCEEDED(hr) && spTxtRange) // get a text range here
{
CComPtr<IHTMLElement> spElement=NULL;
// get self element first for tag: such as "h6"
hr = spTxtRange->QueryInterface(IID_IHTMLElement, (void**)&spElement);
if (SUCCEEDED(hr) && spElement)
{
hr = spElement->get_tagName(&cbsTagName);
if (SUCCEEDED(hr) && 0 == strTagName.CompareNoCase(CString(cbsTagName)) )
{ // found tag now
return TRUE;
}
}
// loop search in parent for tag: such as "h6"
spElement=NULL;
CComPtr<IHTMLElement> spParent = NULL;
hr =spTxtRange->parentElement (&spParent);
while (SUCCEEDED(hr) && spParent)
{
hr = spParent->get_tagName(&cbsTagName);
if (SUCCEEDED(hr) && 0 == strTagName.CompareNoCase(CString(cbsTagName)) )
{ // found tag now
return TRUE;
}
spElement = spParent;
spParent = NULL;
hr = spElement->get_parentElement(&spParent);
}
}
}
}
}
}
catch(CException* e)
{
e->ReportError();
e->Delete();
}
return FALSE;
}