JavaScript 调用 ActiveX 控件中的方法
1. 在 InfoViewer 中添加一方法，用来弹出一个MessageBox
public void Alert(string msg)
{
MessageBox.Show(msg);
}
2. 修改 HTML 的代码
<object id="inforViewer" classid="clsid:B3BCD23C-53EE-4661-83E0-559E5D022514"></object>
<input type='button' onclick='inforViewer.Alert("Hello")' value='Click Me'>
3. IE 中查看 Html 页面，此时点击 Click Me 按钮，并不会弹出一个MessageBox，在IE默认安全级别下，会阻止运行ActiveX
4. 修改 IE 的本地安全级别为低或者添加至可信站点
5. 刷新页面，再次点击 Click Me 按钮，会弹出询问窗口
6. 选择是即可交互成功
屏蔽调用ActiveX控件方法时弹出的询问窗口
1. 添加一个接口 IObjectSafety，这个接口的代码不能改动
[ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IObjectSafety
{
[PreserveSig]
int GetInterfaceSafetyOptions(ref Guid riid,
[MarshalAs(UnmanagedType.U4)] ref int pdwSupportedOptions,
[MarshalAs(UnmanagedType.U4)] ref int pdwEnabledOptions);
[PreserveSig()]
int SetInterfaceSafetyOptions(ref Guid riid,
[MarshalAs(UnmanagedType.U4)] int dwOptionSetMask,
[MarshalAs(UnmanagedType.U4)] int dwEnabledOptions);
}
2. InfoViewer 实现 IObjectSafety 接口
private const string _IID_IDispatch = "{00020400-0000-0000-C000-000000000046}";
private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";
private const string _IID_IPersistStorage = "{0000010A-0000-0000-C000-000000000046}";
private const string _IID_IPersistStream = "{00000109-0000-0000-C000-000000000046}";
private const string _IID_IPersistPropertyBag = "{37D84F60-42CB-11CE-8135-00AA004BB851}";
private const int INTERFACESAFE_FOR_UNTRUSTED_CALLER = 0x00000001;
private const int INTERFACESAFE_FOR_UNTRUSTED_DATA = 0x00000002;
private const int S_OK = 0;
private const int E_FAIL = unchecked((int)0x80004005);
private const int E_NOINTERFACE = unchecked((int)0x80004002);
private bool _fSafeForScripting = true;
private bool _fSafeForInitializing = true;
public int GetInterfaceSafetyOptions(ref Guid riid,
ref int pdwSupportedOptions,
ref int pdwEnabledOptions)
{
int Rslt = E_FAIL;
string strGUID = riid.ToString("B");
pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
switch (strGUID)
{
case _IID_IDispatch:
case _IID_IDispatchEx:
Rslt = S_OK;
pdwEnabledOptions = 0;
if (_fSafeForScripting == true)
pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
break;
case _IID_IPersistStorage:
case _IID_IPersistStream:
case _IID_IPersistPropertyBag:
Rslt = S_OK;
pdwEnabledOptions = 0;
if (_fSafeForInitializing == true)
pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
break;
default:
Rslt = E_NOINTERFACE;
break;
}
return Rslt;
}
public int SetInterfaceSafetyOptions(ref Guid riid,
int dwOptionSetMask,
int dwEnabledOptions)
{
int Rslt = E_FAIL;
string strGUID = riid.ToString("B");
switch (strGUID)
{
case _IID_IDispatch:
case _IID_IDispatchEx:
if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_CALLER) &&
(_fSafeForScripting == true))
Rslt = S_OK;
break;
case _IID_IPersistStorage:
case _IID_IPersistStream:
case _IID_IPersistPropertyBag:
if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_DATA) &&
(_fSafeForInitializing == true))
Rslt = S_OK;
break;
default:
Rslt = E_NOINTERFACE;
break;
}
return Rslt;
}
3. 重新编译项目，IE 中查看 Html 页面，点击 Click Me 按钮，已经不会再弹出询问窗口了