测试C++代码与WebBrowser HTML的互动

testWebBrowserDlg.h

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// testWebBrowserDlg.h : 头文件 //   #pragma once #include "explorer1.h"     #import "C:\windows\system32\mshtml.tlb" // location of mshtml.tlb   #include <map>   #include <comdef.h> #include <mshtml.h> #include <mshtmdid.h> /* 标题：测试C++代码与WebBrowser HTML的互动 Author:Kagula Date:2014-08-20 版本号：3 Test Env: Windows8.1、VS2013 Update2 内容： [1]如何拿到html中的elements，取得它的属性! [2]如何响应element激发的事件 [3]如何修改指定element的属性 [4]如何Render内存中的html字符串   参考资料 [1]《MFC中针对WebBrowser控件增加link链接点击事件监控》 http://www.mworkbox.com/wp/work/509.html [2]《IWebBrowser2 interface》 http://msdn.microsoft.com/en-us/library/aa752127(VS.85).aspx [3]《Handling HTML Element Events》 http://msdn.microsoft.com/en-us/library/bb508508(v=vs.85).aspx [4]《如何从 VC web 浏览器应用程序中调用脚本函数》 http://support.microsoft.com/kb/q185127 [5]《Loading HTML content from a Stream》 http://msdn.microsoft.com/en-us/library/ie/aa752047%28v=vs.85%29.aspx [6]《How do I get the font color from a piece of HTML source code?》 http://stackoverflow.com/questions/7402347/how-do-i-get-the-font-color-from-a-piece-of-html-source-code [7]《How to create a sink interface in a MFC-based COM client》 http://support.microsoft.com/default.aspx?scid=kb;en-us;181845 [8]《How To Use the Microsoft WebBrowser Control to Render HTML from Memory》 http://www.nuonsoft.com/blog/2010/03/24/how-to-use-the-microsoft-webbrowser-control-to-render-html-from-memory/comment-page-1/ [9]《How do I get the font color from a piece of HTML source code?》 http://stackoverflow.com/questions/7402347/how-do-i-get-the-font-color-from-a-piece-of-html-source-code [10]《Using the WebBrowser control, simplified》 http://www.codeproject.com/Articles/3919/Using-the-WebBrowser-control-simplified [11]《Microsoft Internet Explorer 5.5 behaviors》 http://msdn.microsoft.com/en-us/magazine/cc301528.aspx [12]《Using IHTMLEditDesigner》 http://www.codeproject.com/Articles/6546/Using-IHTMLEditDesigner [13]《MFC C++ WebBrowser Control load HTML from a string》 http://stackoverflow.com/questions/9179179/mfc-c-webbrowser-control-load-html-from-a-string [14]VC++ webbrowser函数使用范例 [15]《【webbrowser使用】_webbrowser使用的相关文章，教程，源码》 http://www.xuebuyuan.com/zt/12577882.html */   namespace kagula {     struct ConnectionInfo     {         IDispatch* dispatch;         IID iid;                DWORD cookie;           ConnectionInfo() {}         ConnectionInfo(IDispatch *dispatch, IID iid, DWORD cookie)         {             this->dispatch = dispatch, this->iid = iid, this->cookie = cookie;         }     }; } // CtestWebBrowserDlg 对话框 class CtestWebBrowserDlg : public CDialogEx { // 构造 public:     CtestWebBrowserDlg(CWnd* pParent = NULL);   // 标准构造函数   // 对话框数据     enum { IDD = IDD_TESTWEBBROWSER_DIALOG };       protected:     virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持     // 实现 protected:     HICON m_hIcon;       // 生成的消息映射函数     virtual BOOL OnInitDialog();     afx_msg void OnSysCommand(UINT nID, LPARAM lParam);     afx_msg void OnPaint();     afx_msg HCURSOR OnQueryDragIcon();     DECLARE_MESSAGE_MAP()   public:     CExplorer1 m_webBrowser;     void SetElementAttribute(MSHTML::IHTMLDocument2Ptr htmlDoc,CString elementID,CString attributeName,CString value);     std::map<IDispatch*, kagula::ConnectionInfo> m_mapElem2EventCookie;//用于释放Connection     void ReleaseHTMLConnection();       void DemoGetElement(LPDISPATCH pDisp, VARIANT* URL);     void DemoGetAllLinkElement(LPDISPATCH pDisp, VARIANT* URL);       void OnClick(MSHTML::IHTMLEventObj *pEvtObj);     void OnLostFocus(MSHTML::IHTMLEventObj *pEvtObj);     void WriteHTML(const wchar_t* html);       afx_msg void OnBnClickedMemoryRender();       //added new three map macros     DECLARE_EVENTSINK_MAP()     DECLARE_DISPATCH_MAP()      DECLARE_INTERFACE_MAP()       void BeforeNavigate2Explorer1(LPDISPATCH pDisp, VARIANT* URL, VARIANT* Flags, VARIANT* TargetFrameName, VARIANT* PostData, VARIANT* Headers, BOOL* Cancel);     void DocumentCompleteExplorer1(LPDISPATCH pDisp, VARIANT* URL);     afx_msg void OnBnClickedBtnSetspecifiedelementattr();     virtual void OnOK();     virtual void OnCancel(); };

　　testWebBrowserDlg.cpp

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// testWebBrowserDlg.cpp : 实现文件 //   #include "stdafx.h"     #include "testWebBrowser.h" #include "testWebBrowserDlg.h" #include "afxdialogex.h"   #include <string>   #include <afxctl.h>   #ifdef _DEBUG #define new DEBUG_NEW #endif     // CtestWebBrowserDlg 对话框 CtestWebBrowserDlg::CtestWebBrowserDlg(CWnd* pParent /*=NULL*/)     : CDialogEx(CtestWebBrowserDlg::IDD, pParent) {     m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); }   void CtestWebBrowserDlg::DoDataExchange(CDataExchange* pDX) {     CDialogEx::DoDataExchange(pDX);     DDX_Control(pDX, IDC_EXPLORER1, m_webBrowser); }   BEGIN_MESSAGE_MAP(CtestWebBrowserDlg, CDialogEx)     ON_WM_SYSCOMMAND()     ON_WM_PAINT()     ON_WM_QUERYDRAGICON()     ON_BN_CLICKED(IDC_BTN_RENDERSTRING, &CtestWebBrowserDlg::OnBnClickedMemoryRender)     ON_BN_CLICKED(IDC_BTN_SETSPECIFIEDELEMENTATTR, &CtestWebBrowserDlg::OnBnClickedBtnSetspecifiedelementattr) END_MESSAGE_MAP()     // CtestWebBrowserDlg 消息处理程序   BOOL CtestWebBrowserDlg::OnInitDialog() {     CDialogEx::OnInitDialog();       // 设置此对话框的图标。  当应用程序主窗口不是对话框时，框架将自动     //  执行此操作     SetIcon(m_hIcon, TRUE);         // 设置大图标     SetIcon(m_hIcon, FALSE);        // 设置小图标       // TODO:  在此添加额外的初始化代码     EnableAutomation();//没有这行代码会导致GetIDispatch(FALSE)失败！       //m_webBrowser.Navigate(L"D:\\Workspace\\testWebBrowser\\testWebBrowser\\test.html",NULL,NULL,NULL,NULL);     m_webBrowser.Navigate(L"about:blank", NULL, NULL, NULL, NULL);            return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE }   void CtestWebBrowserDlg::OnSysCommand(UINT nID, LPARAM lParam) {     CDialogEx::OnSysCommand(nID, lParam); }   // 如果向对话框添加最小化按钮，则需要下面的代码 //  来绘制该图标。  对于使用文档/视图模型的 MFC 应用程序， //  这将由框架自动完成。   void CtestWebBrowserDlg::OnPaint() {     if (IsIconic())     {         CPaintDC dc(this); // 用于绘制的设备上下文           SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);           // 使图标在工作区矩形中居中         int cxIcon = GetSystemMetrics(SM_CXICON);         int cyIcon = GetSystemMetrics(SM_CYICON);         CRect rect;         GetClientRect(&rect);         int x = (rect.Width() - cxIcon + 1) / 2;         int y = (rect.Height() - cyIcon + 1) / 2;           // 绘制图标         dc.DrawIcon(x, y, m_hIcon);     }     else     {         CDialogEx::OnPaint();     } }   //当用户拖动最小化窗口时系统调用此函数取得光标 //显示。 HCURSOR CtestWebBrowserDlg::OnQueryDragIcon() {     return static_cast<HCURSOR>(m_hIcon); }     //测试:Render内存中的HTML void CtestWebBrowserDlg::OnBnClickedMemoryRender() {     m_webBrowser.Navigate(L"app://mymemory.page",NULL,NULL,NULL,NULL); }   BEGIN_EVENTSINK_MAP(CtestWebBrowserDlg, CDialogEx)     ON_EVENT(CtestWebBrowserDlg, IDC_EXPLORER1, 250, CtestWebBrowserDlg::BeforeNavigate2Explorer1, VTS_DISPATCH VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PBOOL)     ON_EVENT(CtestWebBrowserDlg, IDC_EXPLORER1, 259, CtestWebBrowserDlg::DocumentCompleteExplorer1, VTS_DISPATCH VTS_PVARIANT) END_EVENTSINK_MAP()   /* 第二步：处理所有种类元素的事件 */ BEGIN_INTERFACE_MAP(CtestWebBrowserDlg, CCmdTarget)     INTERFACE_PART(CtestWebBrowserDlg, DIID_HTMLElementEvents2, Dispatch) END_INTERFACE_MAP()   /* 第三步： 某种事件（元素类型无关）和哪个响应函数连*/ BEGIN_DISPATCH_MAP(CtestWebBrowserDlg, CCmdTarget)     DISP_FUNCTION_ID(CtestWebBrowserDlg, "HTMLELEMENTEVENTS2_ONCLICK",    DISPID_HTMLELEMENTEVENTS2_ONCLICK,    CtestWebBrowserDlg::OnClick, VT_EMPTY, VTS_DISPATCH)     DISP_FUNCTION_ID(CtestWebBrowserDlg, "HTMLELEMENTEVENTS2_ONFOCUSOUT", DISPID_HTMLELEMENTEVENTS2_ONFOCUSOUT, CtestWebBrowserDlg::OnLostFocus, VT_EMPTY, VTS_DISPATCH) END_DISPATCH_MAP()   void CtestWebBrowserDlg::BeforeNavigate2Explorer1(LPDISPATCH pDisp, VARIANT* URL, VARIANT* Flags, VARIANT* TargetFrameName, VARIANT* PostData, VARIANT* Headers, BOOL* Cancel) {     CString strURL(URL->bstrVal);     *Cancel = FALSE;     if (strURL == _T("about:blank"))     {         *Cancel = FALSE;     }       else     {         if (strURL.Find(_T("ThePageNeverReach.htm")) > 0 )         {//阻止跳转到指定页面！             *Cancel = TRUE;             return;         }     }       if (!(*Cancel))     {         //进入新页面之前，先释放掉事件连接         ReleaseHTMLConnection();     }       //演示，render内存中的html页面!     if (strURL.Find(_T("app://mymemory.page")) >= 0)     {         *Cancel = TRUE;         WriteHTML(L"<html><body><h1>My Header</h1><p>Some text below the header</p></body></html>");         return;     } }     void CtestWebBrowserDlg::DocumentCompleteExplorer1(LPDISPATCH pDisp, VARIANT* URL) {     //DemoGetElement(pDisp, URL);     DemoGetAllLinkElement(pDisp, URL);   }//end func   //演示：鼠标点击事件 void CtestWebBrowserDlg::OnClick(MSHTML::IHTMLEventObj *pEvtObj) {     MSHTML::IHTMLElementPtr elem = pEvtObj->srcElement;     CString cstrID = elem->Getid();     CString cstrTag = elem->GettagName();//标签的名字       if (cstrID.GetLength()<=0)     {         return;     }           _variant_t name = elem->getAttribute(_T("name"), 0);     CString cstrName;     if (name.vt != VT_NULL)     {         cstrName = name;     }       _variant_t href = elem->getAttribute(_T("value"), 0);     CString cstrHref;     if (href.vt != VT_NULL)     {         cstrHref = href.bstrVal;     }       CString msg;     msg.Format(L"[id=%s][name=%s][tag=%s][value=%s]", cstrID.GetBuffer(),         cstrName.GetBuffer(), cstrTag.GetBuffer(), cstrHref.GetBuffer(MAX_PATH));     TRACE(msg); }   //演示：响应 标签 失去焦点事件 void CtestWebBrowserDlg::OnLostFocus(MSHTML::IHTMLEventObj *pEvtObj) {     MSHTML::IHTMLElementPtr elem = pEvtObj->srcElement;       CString cstrID = elem->Getid();     if (cstrID.GetLength()<=0)     {         return;     }       CString msg;     msg.Format(L"OnLostFocus cstrID = [%s]", cstrID.GetBuffer());     AfxMessageBox(msg); }   //演示：拿到指定ID的标签元素，并打印它的属性 void CtestWebBrowserDlg::DemoGetElement(LPDISPATCH pDisp, VARIANT* URL) {     IWebBrowser2Ptr webBrowser(pDisp);     IDispatchPtr htmlDocDisp;     (*webBrowser).get_Document(&htmlDocDisp);     MSHTML::IHTMLDocument2Ptr htmlDoc(htmlDocDisp);       MSHTML::IHTMLElementCollectionPtr elements;     (*htmlDoc).get_all(&elements);       IDispatchPtr disp;     _variant_t index(0L, VT_I4);     do     {         disp = (*elements).item(_variant_t("myFontTag"), index);         if (disp != NULL)         {             MSHTML::IHTMLElementPtr element(disp);               variant_t vtValue = element->getAttribute("color", 0);             CString cstr = vtValue;             TRACE(L"mytag标签的color属性为%s\n", cstr.GetBuffer(MAX_PATH));               ++index.lVal;         }     } while (disp != NULL); }   /* 拿到元素，并做链接 [1]《AfxConnectionAdvise》 http://msdn.microsoft.com/en-us/library/b9h84ebk.aspx [2]《How to create a sink interface in a MFC-based COM client》 http://support.microsoft.com/default.aspx?scid=kb;en-us;181845 [3]《同Document建立Connection》 http://www.popkistopki.ru/ch08e.htm */ void CtestWebBrowserDlg::DemoGetAllLinkElement(LPDISPATCH pDisp, VARIANT* URL) {     // Get the HTML document. //     IWebBrowser2Ptr webBrowser(pDisp);     IDispatchPtr htmlDocDisp;     (*webBrowser).get_Document(&htmlDocDisp);     MSHTML::IHTMLDocument2Ptr htmlDoc(htmlDocDisp);       if (htmlDoc == NULL) //URL属性为空     {         return;     }       //打印HTML页面内容     MSHTML::IHTMLElementPtr body = htmlDoc->Getbody();     variant_t html = body->parentElement->outerHTML;     //variant_t bodyHTML = body->GetouterHTML();     CString cstrBodyHTML = html;     TRACE(L"cstrBodyHTML.GetBuffer()========\n%s\n", cstrBodyHTML.GetBuffer());         //取HTML中的元素     DWORD dwCookie = 0;     // Get the collection of elements.     MSHTML::IHTMLElementCollectionPtr elements;     (*htmlDoc).get_all(&elements);       IDispatchPtr disp;     _variant_t index(0L, VT_I4);     do     {         //Get all elements         disp = (*elements).item(index, index);         if (disp != NULL)         {             // Examine their action attribute to determine what should be done.             IDispatchPtr element(disp);             MSHTML::IHTMLElementPtr elemTag(disp);               //第一步：建立Connection             DWORD dwCookie = 0;             BSTR name = NULL;             elemTag->get_tagName(&name);             if (name != NULL)             {                 //is link!!!!                 LPUNKNOWN pUnkSink = GetIDispatch(FALSE);                   //关联全部类型元素                 if (AfxConnectionAdvise(element, DIID_HTMLElementEvents2, pUnkSink, FALSE, &dwCookie))                 {                     kagula::ConnectionInfo ci(element.GetInterfacePtr(), DIID_HTMLElementEvents2, dwCookie);                     m_mapElem2EventCookie[element.GetInterfacePtr()] = ci;                 }             }//end if             ++index.lVal;         }     } while (disp != NULL); }   //释放同HTML的Connection void CtestWebBrowserDlg::ReleaseHTMLConnection() {     std::map<IDispatch *, kagula::ConnectionInfo>::iterator itr;     for (itr = m_mapElem2EventCookie.begin(); itr != m_mapElem2EventCookie.end(); itr++)     {         //DIID_HTMLDocumentEvents、DIID_HTMLAnchorEvents2、DIID_HTMLButtonElementEvents         AfxConnectionUnadvise(itr->first,  itr->second.iid, GetIDispatch(FALSE), FALSE, itr->second.cookie);     }     m_mapElem2EventCookie.clear(); }   //测试，设置当前页面指定元素的属性 void CtestWebBrowserDlg::OnBnClickedBtnSetspecifiedelementattr() {     CComPtr<IDispatch> spDisp = m_webBrowser.get_Application();     if (spDisp != NULL)     {         CComPtr<IWebBrowser2> spWeb;         HRESULT hr = spDisp->QueryInterface(IID_IWebBrowser2, (void**)&spWeb);         if (SUCCEEDED(hr))         {             IDispatchPtr htmlDocDisp;             spWeb->get_Document(&htmlDocDisp);             MSHTML::IHTMLDocument2Ptr htmlDoc(htmlDocDisp);               if (htmlDoc == NULL) //URL属性为空             {                 return;                     }               SetElementAttribute(htmlDoc, L"firstname", L"value", L"Marcia");             SetElementAttribute(htmlDoc, L"lastname",L"value", L"JohnDoe");             SetElementAttribute(htmlDoc, L"female",L"checked", L"1");             SetElementAttribute(htmlDoc, L"bike",L"checked", L"");             SetElementAttribute(htmlDoc, L"car",L"checked", L"1");               //演示，重定向到其它URL             //CComVariant varURL("http://www.intel.com");             //spWeb->Navigate2(&varURL, NULL, NULL, NULL, NULL);         }     }   }   void CtestWebBrowserDlg::SetElementAttribute(MSHTML::IHTMLDocument2Ptr htmlDoc, CString elementID, CString attributeName, CString value) {     MSHTML::IHTMLElementCollectionPtr elements;     htmlDoc->get_all(&elements);       IDispatchPtr disp;     _variant_t index(0L, VT_I4);     do     {         disp = (*elements).item(_variant_t(elementID.GetBuffer()), index);         if (disp != NULL)         {             MSHTML::IHTMLElementPtr element(disp);               element->setAttribute(attributeName.GetBuffer(), value.GetBuffer(),0);               ++index.lVal;         }     } while (disp != NULL); }   /*测试render内存中的html*/ void CtestWebBrowserDlg::WriteHTML(const wchar_t* html) {     IDispatch* pHtmlDoc = m_webBrowser.get_Document();       /*     在调用这段代码之前，如果你还没有url需要navigate，就必须在     OnInitDialog中插入下面的代码，否则拿不到document!     m_webBrowser.Navigate(L"about:blank",NULL,NULL,NULL,NULL);     */     if (!pHtmlDoc)         return;       CComPtr<IHTMLDocument2> doc2;     doc2.Attach((IHTMLDocument2*)pHtmlDoc);     if (!doc2)         return;     // Creates a new one-dimensional array     SAFEARRAY* psaStrings = SafeArrayCreateVector(VT_VARIANT, 0, 1);     if (!psaStrings)         return;     BSTR bstr = SysAllocString(html);     if (bstr)     {         VARIANT* param;         HRESULT hr = SafeArrayAccessData(psaStrings, (LPVOID*)¶m);         if (SUCCEEDED(hr))         {             param->vt = VT_BSTR;             param->bstrVal = bstr;             hr = SafeArrayUnaccessData(psaStrings);             if (SUCCEEDED(hr))             {                 doc2->write(psaStrings);                 doc2->close();             }         }     }     // SafeArrayDestroy calls SysFreeString for each BSTR!     if (psaStrings)         SafeArrayDestroy(psaStrings); }   //退出前要释放链接 void CtestWebBrowserDlg::OnOK() {     ReleaseHTMLConnection();     CDialogEx::OnOK(); }     void CtestWebBrowserDlg::OnCancel() {     ReleaseHTMLConnection();     CDialogEx::OnCancel(); }

　　test.html

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<head>     <title></title>     <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> </head> <body>     <h1 id="myH1Tag">测试从H1标签能不能得到事件</h1>     <font id="myFontTag" color=#5a6571>测试能不能从font标签得到事件</font> <br />     <br />     <br />     <a id="idOfA" name="nameOfA" href="file:D:\Workspace\testWebBrowser\testWebBrowser\ThePageNeverReach.htm">测试禁止页面跳转</a><br/>     <a id="id2OfA" name="name2OfA" href="file:D:\Workspace\testWebBrowser\testWebBrowser\HTMLPage.htm">测试用户点击链接， C++后台得到消息！，并跳转到页面</a>       <form>         First name: <input id='firstname' type='text' name='firstname' /><br />         Last name: <input id='lastname' type='text' name='lastname' /><br />         Password: <input id='password' type='password' name='pwd' /><br><br />         <input type='radio' id='male' name='sex' value='male' />Male<br />         <input type='radio' id='female' name='sex' value='female' />Female<br /><br />         <input type='checkbox' id='bike' name='vehicle' value='Bike' />I have abdsmasterbike<br />         <input type='checkbox' id='car' name='vehicle' value='Car' />I have a car <br /><br />         <input type='button' id='ok' value='OK' /><br />         <input type='button' id='cancel' value='Cancel' /><br /><br />     </form> </body>

　　

转载自：http://blog.csdn.net/lee353086/article/details/38537415

 

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