1.在COM组件中调用JavaScript函数 // 连接点方式页面javascript脚本 <object classid="CLSID:B568F111-DFE4-4944-B67F-0728AB2AB30F" id="testCom" VIEWASTEXT></object> <script language="JavaScript" for="testCom" event="staTe(s)"> alert("State(" + s + ")"); return 123; </script> <script language="JavaScript"> testCom.FireStateEvent("Hello"); </script>
// 事件属性方式页面javascript脚本 function onState(s){ alert("onState(" + s + ")"); return 456; } var o = new ActiveXObject("TestATL.TestCom"); o.onstaTe=onState; o.FireStateEvent("Hello");
// Com组件VC7.1 ATL代码 __interface _ITestComEvents{ [id(1), helpstring("State事件")] HRESULT State([in] BSTR str); }; __event __interface _ITestComEvents; IDispatchPtr m_onState; // 事件属性 STDMETHOD(get_onState)(IDispatch** pVal) { *pVal = m_onState; return S_OK; }; STDMETHOD(put_onState)(IDispatch* newVal) { m_onState = newVal; return S_OK; }; STDMETHOD(FireStateEvent)(BSTR str) { __raise State(str); // 激发连接点事件 CComVariant result; CComVariant avarParams[1] = {str}; DISPPARAMS dispParams = {avarParams, NULL, 1, 0}; EXCEPINFO excepInfo; memset(&excepInfo, 0, sizeof excepInfo); UINT nArgErr = (UINT)-1; // initialize to invalid arg if (m_onState) // 激发属性事件 HRESULT hr = m_onState->Invoke(0, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &dispParams, &result, &excepInfo, &nArgErr); return S_OK; } 参见: How To Call a Script Function from a VC WebBrowser Application 如何在COM object中使用 Javascript function object? 在COM组件中调用JavaScript函数
2.从页面javascript向Com组件传递结构数组 // 页面脚本 var o = new ActiveXObject("TestATL.TestCom"); o.onstaTe=onState; o.Put("array", {0: 123, 1: "abc"}); o.Put("array", [456, "def"]); o.Put("array", [{name: "tom", age: 8}, {name: "jack", age: 10}]); var a = new Array(789, "ghi"); // has "length" property o.Put("array", a);
// Com组件VC7.1 ATL代码 STDMETHODIMP CTestCom::Put(BSTR key, VARIANT value) { WCHAR output[4096] = L""; if(0 == wcsicmp(key, L"array") && VT_DISPATCH == value.vt) { IDispatchPtr spDisp = value.pdispVal; DISPID dispID = 0; DISPPARAMS dispParams = {NULL, NULL, 0, 0}; CComVariant result; EXCEPINFO excepInfo; memset(&excepInfo, 0, sizeof excepInfo); UINT nArgErr = (UINT)-1; // initialize to invalid arg unsigned int length = 0; // 数组长度 或 属性 个数
LPOLESTR func = L"length"; HRESULT hr = spDisp->GetIDsOfNames(GUID_NULL, &func, 1, LOCALE_SYSTEM_DEFAULT, &dispID); if(S_OK == hr){ // 如果有"length"属性 hr = spDisp->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_PROPERTYGET, &dispParams, &result, &excepInfo, &nArgErr); if(S_OK == hr && VT_I4 == result.vt) length = result.intVal; // 直接读取数组长度 }else{ unsigned int nTypeInfo = 0; hr = spDisp->GetTypeInfoCount(&nTypeInfo); ATLASSERT(1 == nTypeInfo); ITypeInfoPtr spTypeInfo; hr = spDisp->GetTypeInfo(0, 0, &spTypeInfo); TYPEATTR *pTypeAttr = NULL; hr = spTypeInfo->GetTypeAttr(&pTypeAttr); //ATLASSERT("{C59C6B12-F6C1-11CF-8835-00A0C911E8B2}" == pTypeAttr->guid); // JScript: length = pTypeAttr->cVars; // 从类型信息读取数组长度 spTypeInfo->ReleaseTypeAttr(pTypeAttr); } for(unsigned int i=0; i<length; i++) { WCHAR buf[32]; _itow(i, buf, 10); func = buf; hr = spDisp->GetIDsOfNames(GUID_NULL, &func, 1, LOCALE_SYSTEM_DEFAULT, &dispID); hr = spDisp->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_PROPERTYGET, &dispParams, &result, &excepInfo, &nArgErr); if(S_OK != hr) continue; if(VT_DISPATCH == result.vt){ IDispatchPtr spItem = result.pdispVal; func = L"name"; hr = spItem->GetIDsOfNames(GUID_NULL, &func, 1, LOCALE_SYSTEM_DEFAULT, &dispID); hr = spItem->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_PROPERTYGET, &dispParams, &result, &excepInfo, &nArgErr); if(S_OK == hr && VT_BSTR == result.vt) swprintf(output + wcslen(output), L"name=%s", result.bstrVal); func = L"age"; hr = spItem->GetIDsOfNames(GUID_NULL, &func, 1, LOCALE_SYSTEM_DEFAULT, &dispID); hr = spItem->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_PROPERTYGET, &dispParams, &result, &excepInfo, &nArgErr); if(S_OK == hr && VT_I4 == result.vt) swprintf(output + wcslen(output), L" age=%d/n", result.intVal); }else if(VT_BSTR == result.vt) swprintf(output + wcslen(output), L"BSTR:%s/n", result.bstrVal); else if(VT_I4 == result.vt) swprintf(output + wcslen(output), L"I4:%d/n", result.intVal); else swprintf(output + wcslen(output), L"item.vt=%d/n", result.vt); } } FireStateEvent(output); return S_OK; }
3.枚举IE窗口的内容,并调用其中的脚本 #import <mshtml.tlb> // Internet Explorer 5 #import <shdocvw.dll> SHDocVw::IShellWindowsPtr spSHWinds; spSHWinds.CreateInstance(__uuidof(SHDocVw::ShellWindows)); long nCount = spSHWinds->GetCount(); IDispatchPtr spDisp; for (long i = 0; i < nCount; i++) { _variant_t va(i, VT_I4); spDisp = spSHWinds->Item(va); SHDocVw::IWebBrowser2Ptr spBrowser(spDisp); if (spBrowser != NULL) { _bstr_t location = spBrowser->GetLocationName(); if(_bstr_t(L"Test DapCtrl") == location) // 找指定IE窗口 { IHTMLDocument2Ptr spDoc(spBrowser->GetDocument()); if (spDoc != NULL) { _bstr_t exp = m_onState; IDispatch *pdis = NULL; hr = spDoc->get_Script(&pdis); if(pdis){ DISPID tmpDispID = 0; LPOLESTR func = L"Test"; // javascript 函数名 hr = pdis->GetIDsOfNames(GUID_NULL, &func, 1, LOCALE_SYSTEM_DEFAULT, &tmpDispID); if(S_OK == hr) hr = pdis->Invoke(tmpDispID, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &dispParams, &result, &excepInfo, &nArgErr); } } } } } 参见: HOWTO: Connect to a Running Instance of Internet Explorer ActiveX组件与JavaScript交互 ActiveX组件控制其所在的IE窗口
4.在VC中执行脚本 #import <msscript.ocx> // msscript.ocx using namespace MSScriptControl; IScriptControlPtr pScriptControl(__uuidof(ScriptControl)); LPSAFEARRAY psa; SAFEARRAYBOUND rgsabound[] = { 1, 0 }; // 1 elements, 0-based int i; psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound); if (!psa) { return E_OUTOFMEMORY; } VARIANT vFlavors[1]; for (i = 0; i < 1; i++) { VariantInit(&vFlavors[i]); V_VT(&vFlavors[i]) = VT_BSTR; } V_BSTR(&vFlavors[0]) = SysAllocString(bstr); long lZero = 0; hr = SafeArrayPutElement(psa, &lZero,&vFlavors[0]); for(i=0;i<1;i++) { SysFreeString(vFlavors[i].bstrVal); } pScriptControl->Language = "JScript"; pScriptControl->AllowUI = TRUE; _bstr_t exp = L"1+2+3"; _variant_t outpar = pScriptControl->Eval(exp); //_variant_t outpar = pScriptControl->ExecuteStatement(exp); //_variant_t outpar = pScriptControl->Run("MyStringFunction", &psa); _bstr_t bstrReturn = (_bstr_t)outpar; char *pResult = (char *)bstrReturn; SafeArrayDestroy(psa); 参见:
How To Call Run() Method of the Microsoft Script Control in C++
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