IE 顶层 body 节点通过IHTMLElement->get_all 方法无法获取iframe 里面的节点列表





所以要获取iframe/frame(frameset) 里面的节点列表的话, 则需要根据body/doc 找到frames, 然后从frames -> IHTMLWindow2 -> IHTMLDocument2 . 主要有2个方法, 下面是代码片段
方法一:
IHTMLWindow2 * pHTMLWnd = NULL;
IHTMLDocument2 * pFrameDoc = NULL;
IHTMLFramesCollection2 * pFramesCollection = NULL; //www.17daima.com
LPDISPATCH lpDispatch;
long p;
VARIANT varindex,varresult;
varresult.vt = VT_DISPATCH;
varindex.vt = VT_I4;
if (pDoc != NULL)
{
HRESULT hr = pDoc -> get_frames( & pFramesCollection);
if (SUCCEEDED(hr) && pFramesCollection != NULL)
{
hr = pFramesCollection -> get_length( & p);
if (SUCCEEDED(hr))
for ( int i = 0 ; i < p; i ++ )
{
varindex.lVal = i;
if (pFramesCollection -> item( & varindex, & varresult) == S_OK)
{
lpDispatch = (LPDISPATCH)varresult.ppdispVal;
if (SUCCEEDED(lpDispatch -> QueryInterface(IID_IHTMLWindow2, (LPVOID * ) & pHTMLWnd)))
{
if (SUCCEEDED(pHTMLWnd -> get_document( & pFrameDoc)))
{
// work with the pFrameDoc

}
pHTMLWnd -> Release(); //www.17daima.com
pHTMLWnd = NULL;
}
}
}
pFramesCollection -> Release();
}
pDoc -> Release();
}
方法二:
CComBSTR bstrTagName;
pElem -> get_tagName( & bstrTagName);
if ( lstrcmpiW(L " IFRAME " , bstrTagName) == 0 ||
lstrcmpiW(L " FRAME " , bstrTagName) == 0 )
{
CComQIPtr < IHTMLFrameBase2 > _framebase2;
CComPtr < IHTMLWindow2 > _framewindow;
CComPtr < IHTMLDocument2 > _framedoc;
if ( (_framebase2 = spItem)
&& SUCCEEDED( _framebase2 -> get_contentWindow( & _framewindow) ) && _framewindow != NULL
&& SUCCEEDED( _framewindow -> get_document( & _framedoc) ) && _framedoc != NULL )
{
// 对 _framedoc 节点进行处理
}
}
附:
IE(控件/接口)中主要有4个部分, Browser, Document, Frame/IFrame, Element , 其对应接口分别是
Browser - IWebBrowser2
Document - IHTMLDocument2
Frame/IFrame- IHTMLWindow2
Element - IHTMLElement
可以通过下面方法互相获取
browser -> document IWebBrowser2::get_Document
document -> frame IHTMLDocument2::get_parentWindow
frame -> document IHTMLWindow2::get_document
frame -> parent frame IHTMLWindow2::get_parent
frame -> children frames IHTMLWindow2::get_frames
element -> Frame IHTMLElement->QI(IHTMLFrameBase2) -> IHTMLFrameBase2->get_contentWindow -> IHTMLWindow2
转自:一起代码网