WebBrowser中取对应的图片资源

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) == 0)

        {

            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 (1)

                {

                    LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;

                    DWORD dwEntrySize = 4096;

                    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,0,(PVOID)&rc1,0);

                    SetWindowPos(NULL, 0, rc1.bottom - 4, 0, 0, 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, 0, 0, 0, 0, SWP_NOSIZE);

                    }

                }

                if (0)

                {

                    LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;

                    HANDLE hCacheDir = NULL;

                    DWORD dwTrySize, dwEntrySize = 4096;

                    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) == 0)

                                {

                                    //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(10);  if(lpCacheEntry){ delete [] lpCacheEntry; lpCacheEntry = NULL;}

                            if(hCacheDir){ FindCloseUrlCache(hCacheDir); hCacheDir = NULL;}

                            break;

                        }

                    }

                }

            }

        }

    }



    CDHtmlDialog::OnDocumentComplete(pDisp, szUrl);

}