How to Interop 2D char from COM function in c#
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I have written a COM DLL which gives the out parameter as BSTR**(Typically 2D Char Array). This COM function will fill the values of BSTR** variable. I am able to use this function sucessfully in MFC Application. But I face problem in using it in C#. The Sample code is as follows: ///////////COM Function//////////////////////////////////////// STDMETHODIMP CSampleTest::GetAllDeviceList2(BSTR** szMaclist) { AFX_MANAGE_STATE(AfxGetStaticModuleState()); for(int i=0;i<10;i++) { szMaclist[i] = new BSTR[100]; wchar_t *szTmp = new wchar_t[100]; wsprintf(szTmp,L"Device%d",i+1); *szMaclist[i]=SysAllocString(szTmp); } return S_OK; } /////////////////////////////////////////////////////////////// I acessed this in VC++ by, BSTR **szMaclist = new BSTR*[10]; CoInitialize(NULL); HRESULT hr = CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,iid,(void**)&pText); if( SUCCEEDED(hr) ) { pText->GetAllDeviceList2(szMaclist); pText->Release(); } and i am sucessful in acessing this function in MFC Application. Can anyone tell me how to acess GetAllDeviceList2() function in c#.
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I have written a COM DLL which gives the out parameter as BSTR**(Typically 2D Char Array). This COM function will fill the values of BSTR** variable. I am able to use this function sucessfully in MFC Application. But I face problem in using it in C#. The Sample code is as follows: ///////////COM Function//////////////////////////////////////// STDMETHODIMP CSampleTest::GetAllDeviceList2(BSTR** szMaclist) { AFX_MANAGE_STATE(AfxGetStaticModuleState()); for(int i=0;i<10;i++) { szMaclist[i] = new BSTR[100]; wchar_t *szTmp = new wchar_t[100]; wsprintf(szTmp,L"Device%d",i+1); *szMaclist[i]=SysAllocString(szTmp); } return S_OK; } /////////////////////////////////////////////////////////////// I acessed this in VC++ by, BSTR **szMaclist = new BSTR*[10]; CoInitialize(NULL); HRESULT hr = CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,iid,(void**)&pText); if( SUCCEEDED(hr) ) { pText->GetAllDeviceList2(szMaclist); pText->Release(); } and i am sucessful in acessing this function in MFC Application. Can anyone tell me how to acess GetAllDeviceList2() function in c#.
Try using SAFEARRAYs rather than standard C arrays. That way, there should be metadata in the type library or something that can help the process. This CP article[^] might help :-)
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p