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C#开发ActiveX控件操作指南

 2010-09-30 20:58:43 来源:WEB开发网   
核心提示: 然后在控件类中继承并实现该接口:#regionIObjectSafety成员privateconststring_IID_IDispatch="{00020400-0000-0000-C000-000000000046}";privateconststring_IID_IDi

然后在控件类中继承并实现该接口: 

#region IObjectSafety 成员  
 
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;  
}  
 
#endregion  

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Tags:开发 ActiveX 控件

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