VC/C++/MFC 獲取IE瀏覽器的滾動條位置

嘗試過各種常規方法去獲取,都獲取不到,到最後使用JS進行獲取了.同時,也提供了一種在VC/C++/MFC下執行網頁JS代碼的方法.話不多說,看代碼:

1 加入頭文件:

#import "C:\\windows\\system32\\msscript.ocx"
using namespace MSScriptControl;

2 代碼實現

CString runJS(IHTMLDocument2* pDoc)
{
    //使用前已經初始化com
    ::CoInitialize(NULL);
    HRESULT hr;
    IScriptControlPtr pScriptControl(__uuidof(ScriptControl));
    pScriptControl->Language = "JScript";
    pScriptControl->AllowUI = TRUE;
    CString jsStr = _T("function getScroll()\
                       {var t, l, w, h;\
                       if (document.documentElement && document.documentElement.scrollTop)\
                       {\
                       t = document.documentElement.scrollTop;\
                       l = document.documentElement.scrollLeft;\
                       } \
                       else if (document.body)\
                       { \
                       t = document.body.scrollTop;\
                       l = document.body.scrollLeft;\
                       } \
                       return l+\"|\"+t;\
                       }    ");

    LPSAFEARRAY psa;
    SAFEARRAYBOUND rgsabound[] = { 1, 0 }; // 1 elements, 0-based
    int i;
    psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound);
    if (!psa)
    {
        return NULL;
    }
    VARIANT vFlavors[1];
    for (i = 0; i < 1; i++)
    {
        VariantInit(&vFlavors[i]);
        V_VT(&vFlavors[i]) = VT_BSTR;
    }
    V_BSTR(&vFlavors[0]) = SysAllocString(L"TC_P");
    long lZero = 0;
    hr = SafeArrayPutElement(psa, &lZero,&vFlavors[0]);
    for(i=0;i<1;i++)
    {
        SysFreeString(vFlavors[i].bstrVal);
    }

    _bstr_t exp = jsStr;
    pScriptControl->AddCode(exp);
    IHTMLDocument2 *objDocument1=NULL;
    IHTMLWindow2* pIHTMLWindow1 = NULL;
    objDocument1 = pDoc;
    if(objDocument1)
    {
        objDocument1->get_parentWindow(&pIHTMLWindow1);
        pScriptControl->AddObject("window", pIHTMLWindow1, VARIANT_TRUE);
    }
    _variant_t outpar = pScriptControl->Run("getScroll", &psa);
    outpar.ChangeType(VT_BSTR,NULL);
    SafeArrayDestroy(psa);
    ::CoUninitialize();
    return outpar.bstrVal;
}

通過這個方法,就可以滾動條的位置了.至於 IHTMLDocument2* pDoc這個對象,獲取方法有很多種,下次我再發獲取IHTMLDocument2* 的代碼.

 

如果大家還有什麼更好的方法,謝謝一起交流!