C# 传递数组参数到 COM && COM 返回数组到 C#

C# 传递数组参数到

C# 调用

string []dropFiles = ｛“1”， “2”， “3”｝;

object fileList = dropFiles;

comWrapper.somemethod( ref fileList);

 

C++ COM函数定义

STDMETHODIMP CcomWrapper::somemethod( VARIANT* fileList )
｛
 。。。。。。。

 ong len=fileList->parray->rgsabound[0].cElements;

 BSTR *pData=new BSTR[len];
 for (LONG i=0;i < len; i++)
 {
  ::SafeArrayGetElement(fileList->parray,&i,pData+i);
 }

 。。。。。。。。
｝

 

 COM 返回数组到 C#

 

COM

[id(16), helpstring("method GetAllButtons")] HRESULT GetAllButtons([in] IUnknown* pDSMenu,[out,retval] VARIANT* ppButtonList);

 

STDMETHODIMP CCDSProjectUtilitiesProxy::GetAllButtons( IUnknown* pDSMenu, VARIANT* ppButtonList)

 

{

HRESULT hr = S_OK;

 

CComSafeArray<VARIANT> m_sa;

 

IDSMenuPtr spMenu =  (IDSMenuPtr)pDSMenu;

 

if(spMenu)

 

{

DSSortedButtonVec btnCmdVec(spMenu);

 

for( int x=0; x < (int) btnCmdVec.size(); x++ )

 

{

CComPtr<IDSMenuButton> spBtn = btnCmdVec[x];

 

if( spBtn != NULL )

 

{

m_sa.Add(CComVariant(spBtn));

 

}

}

CComVariant var(m_sa);

 

var.Detach(ppButtonList);

 

}

return hr;

 

}

 

 

C#

bject buttonsArray = projectUtilitiesProxy.GetAllButtons(dsMenu);