在客户端中使用webbrower控件，控件中已显示网页，对应的图片资源应已下载完，下面从缓存中找到图片资源，两种方法都可
1、GetUrlCacheEntryInfo
http://msdn.microsoft.com/en-us/library/aa384185(v=vs.85).aspx
2、FindFirstUrlCacheEntry、FindNextUrlCacheEntry、FindCloseUrlCache
http://msdn.microsoft.com/zh-SG/library/aa384026
void CTesthaijiaDlg::OnDocumentComplete(LPDISPATCH pDisp, LPCTSTR szUrl)
{
if (pDisp == m_pBrowserApp)
{
CString sCheckUrl(szUrl);
if (sCheckUrl.CompareNoCase(sLoginUrl) == )
{
if (m_spHtmlDoc)
{
CDispatch disp = m_spHtmlDoc;
disp.InvokePtr(L"getElementById", L"txtUserName").Put(L"value", L"abc");
disp.InvokePtr(L"getElementById", L"txtPassword").Put(L"value", L"abc"); CDispatch dispImg = disp.InvokePtr(L"getElementById", L"ValidIMG");
CString s = dispImg.Get(L"src");
if ()
{
LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;
DWORD dwEntrySize = ;
lpCacheEntry = (LPINTERNET_CACHE_ENTRY_INFO) new char[dwEntrySize];
lpCacheEntry->dwStructSize = dwEntrySize;
BOOL b = GetUrlCacheEntryInfo(s, lpCacheEntry, &dwEntrySize);
CString sPath = lpCacheEntry->lpszLocalFileName; RECT rc1;
SystemParametersInfo(SPI_GETWORKAREA,,(PVOID)&rc1,);
SetWindowPos(NULL, , rc1.bottom - , , , SWP_NOSIZE); CDlgCode dlg;
dlg.SetPath(sPath);
if (dlg.DoModal() == IDOK)
{
disp.InvokePtr(L"getElementById", L"txtIMGCode").Put(L"value", CComVariant(dlg.m_sCode));
disp.InvokePtr(L"getElementById", L"BtnLogin").Invoke(L"click");
SetWindowPos(NULL, , , , , SWP_NOSIZE);
}
}
if ()
{
LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;
HANDLE hCacheDir = NULL;
DWORD dwTrySize, dwEntrySize = ;
DWORD dwError = ERROR_INSUFFICIENT_BUFFER;
BOOL bSuccess, bDone = FALSE; //是否已经处理完，初始设为false
while(!bDone){
switch(dwError){
case ERROR_INSUFFICIENT_BUFFER:
if(lpCacheEntry)
{
delete [] lpCacheEntry;
}
lpCacheEntry = (LPINTERNET_CACHE_ENTRY_INFO) new char[dwEntrySize];
lpCacheEntry->dwStructSize = dwEntrySize;
dwTrySize = dwEntrySize;
if(!hCacheDir)
{//为空，说明第一次执行，需要找第一个
hCacheDir = FindFirstUrlCacheEntry(NULL,lpCacheEntry,&dwTrySize);
bSuccess = (hCacheDir != NULL);
}
else
{
bSuccess = FindNextUrlCacheEntry(hCacheDir,lpCacheEntry,&dwTrySize);
}
if(!bSuccess){
dwError = GetLastError();
dwEntrySize = dwTrySize; //使用得到的新长度
}
else
{
dwError = ERROR_SUCCESS;
}
break;
//we are done
case ERROR_NO_MORE_ITEMS:
bDone = TRUE;
break;
//we have got an entry
case ERROR_SUCCESS:
if(bSuccess && (NORMAL_CACHE_ENTRY & lpCacheEntry->CacheEntryType))
{ //
CString sUrl1 = lpCacheEntry->lpszSourceUrlName;
if (sUrl1.Compare(s) == )
{
//处理
}
// CTime lastModified(lpCacheEntry->LastModifiedTime);
// CTime lastAccessed(lpCacheEntry->LastAccessTime);
//a changed cookie - delete it!
// if(lastModified >= m_time || lastAccessed >= m_time){
//const CString name = lpCacheEntry->lpszSourceUrlName;
//const CString result = lastModified.Format("%I:%M:%S%p %d %b %Y");
//MessageBox (NULL, name + " last modified " + result, "Deleting cookie", MB_OK);
//DeleteUrlCacheEntry(lpCacheEntry->lpszSourceUrlName);
}
//get ready for next entry
dwTrySize = dwEntrySize;
if(!FindNextUrlCacheEntry(hCacheDir,lpCacheEntry,&dwTrySize))
{
dwError = GetLastError();
dwEntrySize = dwTrySize; //使用得到的新长度
}
else
{
dwError = ERROR_SUCCESS;
}
break;
//unknown error
default:
CString strError; strError.Format(_T("There is an error (%d) when trying deleting temporary internet files.\r\n"), dwError);
TRACE(strError);
bDone = TRUE;
break;
if(bDone)
break;
Sleep(); if(lpCacheEntry){ delete [] lpCacheEntry; lpCacheEntry = NULL;}
if(hCacheDir){ FindCloseUrlCache(hCacheDir); hCacheDir = NULL;}
break;
}
}
}
}
}
} CDHtmlDialog::OnDocumentComplete(pDisp, szUrl);
}