ActiveX控件在IE中不能显示的解决方案 @ 4/3/2007

技术类
Q:
VC6生成MFC ActiveX,使用htm调用,
CLASSID="CLSID:12342234-3234-4234-5234-623472348234"
CODEBASE="testocx.cab#version=2,7,4,3"

在WinXPSp1上,http://www.sinzy.net/,ok
在WinXPSp2/2k3SP1/Vista上,http://www.sinzy.net/,红X
在WinXPSp2/2k3SP1/Vista上,file:///C:/ActiveX.htm,ok

A:
ActiveX在远程IE页面上执行,需要实现安全接口。

在ATL写的ActiveX中,用IObjectSafety。ms-kb:168371
在MFC写的ActiveX中,直接修改注册表。ms-kb:161873


mfc实现的ocx,要在app实现文件中包括两个文件:
#include <comcat.h>
#include <objsafe.h>

// 本控件的CLSID,注册表用
const GUID CDECL CLSID_SafeItem ={ 0x7AE7497B, 0xCAD8, 0x4E66,
                      { 0xA5,0x8B,0xDD,0xE9,0xBC,0xAF,0x6B,0x61 } };
// 版本控制
const WORD _wVerMajor = 1;
// 次版本号
const WORD _wVerMinor = 0;

实现
// CTestApp::InitInstance - DLL initialization
BOOL CTestApp::InitInstance() {
    return COleControlModule::InitInstance();
}

// CTestApp::ExitInstance - DLL termination
int CTestApp::ExitInstance() {
    return COleControlModule::ExitInstance();
}

// 创建组件种类
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription) {
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;

    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr, NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (FAILED(hr)) return hr;

    // Make sure the HKCR\Component Categories\{..catid...}
    // key is registered.
    CATEGORYINFO catinfo;
    catinfo.catid = catid;
    catinfo.lcid = 0x0409 ; // english

    // Make sure the provided description is not too long.
    // Only copy the first 127 characters if it is.
    int len = wcslen(catDescription);
    if (len>127) len = 127;
    wcsncpy(catinfo.szDescription, catDescription, len);
    // Make sure the description is null terminated.
    catinfo.szDescription[len] = '\0';

    hr = pcr->RegisterCategories(1, &catinfo);
    pcr->Release();

    return hr;
}

// 注册组件种类
HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid) {
    // Register your component categories information.
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;
    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr, NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (SUCCEEDED(hr)) {
      // Register this category as being "implemented" by the class.
      CATID rgcatid[1];
      rgcatid[0] = catid;
      hr = pcr->RegisterClassImplCategories(clsid, 1, rgcatid);
    }
    if (pcr != NULL) pcr->Release();
    return hr;
}

// 卸载组件种类
HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid) {
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;

    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
            NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (SUCCEEDED(hr)) {
      // Unregister this category as being "implemented" by the class.
      CATID rgcatid[1] ;
      rgcatid[0] = catid;
      hr = pcr->UnRegisterClassImplCategories(clsid, 1, rgcatid);
    }

    if (pcr != NULL) pcr->Release();
    return hr;
}

// DllRegisterServer - Adds entries to the system registry
STDAPI DllRegisterServer(void) {
    HRESULT hr;
    AFX_MANAGE_STATE(_afxModuleAddrThis);

    if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))
        return ResultFromScode(SELFREG_E_TYPELIB);

    if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))
        return ResultFromScode(SELFREG_E_CLASS);

    // 标记控件初始化安全.
    // 创建初始化安全组件种类
    hr = CreateComponentCategory(CATID_SafeForInitializing, L"Controls safely initializable from persistent data!");
    if (FAILED(hr)) return hr;
    // 注册初始化安全
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);
    if (FAILED(hr)) return hr;

    // 标记控件脚本安全
    // 创建脚本安全组件种类
    hr = CreateComponentCategory(CATID_SafeForScripting, L"Controls safely scriptable!");
    if (FAILED(hr)) return hr;
    // 注册脚本安全组件种类
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting);
    if (FAILED(hr)) return hr;

    return NOERROR;
}

// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void) {
    HRESULT hr;
    AFX_MANAGE_STATE(_afxModuleAddrThis);

    if (!AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor))
        return ResultFromScode(SELFREG_E_TYPELIB);

    if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))
        return ResultFromScode(SELFREG_E_CLASS);

    // 删除控件初始化安全入口.
    hr=UnRegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);
    if (FAILED(hr)) return hr;
    // 删除控件脚本安全入口
    hr=UnRegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting);
    if (FAILED(hr)) return hr;

    return NOERROR;
}

atl实现的ocx,在声明文件CTestCtl.h中:
class CTestCtl :
    .... ,
    public IObjectSafetyImpl<CTestCtl, INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA>
{
...
BEGIN_COM_MAP(CTestCtl)
COM_INTERFACE_ENTRY(IObjectSafety)
END_COM_MAP()
...
}

或者:

BEGIN_CATEGORY_MAP(CTestCtl)
IMPLEMENTED_CATEGORY(CATID_SafeForInitializing)
IMPLEMENTED_CATEGORY(CATID_SafeForScripting)
END_CATEGORY_MAP()
发布于 4/3/2007 19:02:01 | 评论:0

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