利用WebBrowser控件实现百度自动搜索
转自:http://blog.csdn.net/one_in_one/article/details/26372981
(1)新建一个MFC对话框项目
(2)对话框中添加WebBrower控件,添加方法:点击菜单栏工具->选择工具箱项->在弹出的选择工具箱项对话框选择COM组件->Microsoft Web Browser->确定,添加到对话框中即可。
(3)添加类CWebBrowser2的头文件和实现
右键点击项目->添加->类->Visual C++ -> MFC->ActiveX控件中的MFC类->点击添加按钮->从注册表来源添加类,可用的ActiveX控件选择Microsoft Web Browser<1.0>->接口选择IWebBrowser2->点击>按钮->点击完成按钮,就可以将CWebBrowser2.h和CWebBrowser2.cpp添加到项目中,XXXdlg.h中包含头文件
#include "CWebbrowser2.h",定义变量CWebBrowser2 m_web;
(4)XXXdlg.cpp的DoDataExchange中添加将控件与变量动态绑定
DDX_Control(pDX, IDC_EXPLORER1, m_web);
(5)XXXdlg.cpp的初始化函数中添加
VARIANT vt;
COleVariant vaUrl=_T("http://www.baidu.com");
m_web.Navigate2(vaUrl,&vt,&vt,&vt,&vt);
运行程序,可以看到自动加载百度页面。
(6)XXXdlg.h中添加一下声明,用于当页面加载完成后进一步操作页面
DECLARE_EVENTSINK_MAP()
void DocumentCompleteExplorer(LPDISPATCH pDisp, VARIANT* URL);
(7)XXXdlg.cpp中添加
BEGIN_EVENTSINK_MAP(CbaiduDlg, CDialogEx)
ON_EVENT(CbaiduDlg, IDC_EXPLORER1, 259, CbaiduDlg::DocumentCompleteExplorer, VTS_DISPATCH VTS_PVARIANT)
END_EVENTSINK_MAP()
(8)实现DocumentCompleteExplorer
分析百度源码可以得到输入框的id是kw1,按钮的id是su1。由于百度页面标签变化,自己注意替换。
- <span style="font-size:18px;">void CbaiduDlg::DocumentCompleteExplorer(LPDISPATCH pDisp, VARIANT* URL)
- {
- HRESULT hr;
- LPUNKNOWN lpUnknown;
- LPUNKNOWN lpUnknownWB = NULL;
- LPUNKNOWN lpUnknownDC = NULL;
- IHTMLElementCollection *objAllElement=NULL;
- IHTMLDocument2 *objDocument=NULL;
- CString strUrl,strTemp;
- lpUnknown = m_web.GetControlUnknown();
- ASSERT(lpUnknown);
- if (lpUnknown)
- {
- hr = lpUnknown->QueryInterface(IID_IUnknown,(LPVOID*)&lpUnknownWB);
- ASSERT(SUCCEEDED(hr));
- if (FAILED(hr))
- return;
- hr = pDisp->QueryInterface(IID_IUnknown, (LPVOID*)&lpUnknownDC);
- ASSERT(SUCCEEDED(hr));
- if (SUCCEEDED(hr) && lpUnknownWB == lpUnknownDC)
- {
- // The document has finished loading.
- strUrl=m_web.get_LocationURL();
- if (strUrl.IsEmpty())
- {
- return ;
- }
- objDocument=(IHTMLDocument2*)m_web.get_Document();
- objDocument->get_all(&objAllElement);
- if (strUrl==_T("http://www.baidu.com/"))
- {
- CComPtr<IDispatch>pDisp;
- objAllElement->item(COleVariant(_T("kw1")),COleVariant((long)0),&pDisp);
- CComQIPtr<IHTMLElement, &IID_IHTMLElement>pElement;
- if(pDisp==NULL)
- {
- return;
- }
- else
- {
- pElement=pDisp;
- pElement->put_innerText(_T("测试")); //填充表单
- }
- VARIANT name;
- CComBSTR tag;
- long index;
- objAllElement-> get_length(&index);
- name.vt=VT_I4;
- for(long i=0; i <index; i++)//遍历所有元素,通过id属性获取值
- {
- name.lVal = i;
- IDispatch * pDispatch=NULL;
- objAllElement-> item(name,name,&pDispatch);
- IHTMLElement* spElement;
- pDispatch-> QueryInterface(IID_IHTMLElement, (void**)&spElement);
- BSTR tag;
- spElement->get_id(&tag);
- CString ss(tag);
- if(ss == "su1")
- spElement->click();
- spElement->Release();
- }
- }
- }
- }
- if (lpUnknownWB)
- lpUnknownWB->Release();
- if (lpUnknownDC)
- lpUnknownDC->Release();
- }</span>
运行可以看到百度自动搜索