Passing Safearray from unmanaged C++ to C#

[Roland Moschel]

Hi there !

I have some Problems to get a SafeArray out of a COM Server written in
(Unmanaged) C++.

From (unmanaged) Visual Basic , everything is ok , but unfortunately
in C# I get an exception.

Can anybody help me ?

Thanks a lot !!

Roland




----------------C++ (unmanaged) COM Server Method--------------------


[id(1206), helpstring("met hod GetData")] HRESULT GetImageData(
[in,out]SAFEARRAY(int) *ppsa);



//
*************** *************** *************** *************** ***********
STDMETHODIMP GetImageData(SA FEARRAY** ppsa)
//
*************** *************** *************** *************** ***********

{
// prepare 2 dimensional safearray
SAFEARRAYBOUND rgsabound[2];
rgsabound[0].lLbound = 0;
rgsabound[0].cElements = 512;
rgsabound[1].lLbound = 0;
rgsabound[1].cElements = 512;
*ppsa = SafeArrayCreate (VT_I4, 2, rgsabound);
....
...Filling the SafeArray with the desired Image Data....
}

/*************** *************** *************** *************** *************** *************** *************** *****





-----------(Managed) C# Client ---------------------------------------

private void GetImageData()
{
int[] lengthsArray = new int[2] { 512,512 };
int[] boundsArray = new int[2] { 0 ,0};

Array data = Array.CreateIns tance( typeof(int), lengthsArray,
boundsArray );

//----------------------------COM Call //

m_theComServer. GetImageData(re f imagedata);

//Here I get an exception!!!!!! !!!!!!!!!!!!!!! !!!//
}

[Nicholas Paldino [.NET/C# MVP]]

Re: Passing Safearray from unmanaged C++ to C#

Roland,

How are you accessing the unmanaged code? Can you provide a sample?


--
- Nicholas Paldino [.NET/C# MVP]
- nick(dot)paldin o=at=exisconsul ting<dot>com

"Roland Moschel" <momu@gmx.de> wrote in message
news:rho5ovgvq4 39ch0br6uaekh2p 44tmro1le@4ax.c om...[color=blue]
> Hi there !
>
> I have some Problems to get a SafeArray out of a COM Server written in
> (Unmanaged) C++.
>
> From (unmanaged) Visual Basic , everything is ok , but unfortunately
> in C# I get an exception.
>
> Can anybody help me ?
>
> Thanks a lot !!
>
> Roland
>
>
>
>
> ----------------C++ (unmanaged) COM Server Method--------------------
>
>
> [id(1206), helpstring("met hod GetData")] HRESULT GetImageData(
> [in,out]SAFEARRAY(int) *ppsa);
>
>
>
> //
> *************** *************** *************** *************** ***********
> STDMETHODIMP GetImageData(SA FEARRAY** ppsa)
> //
> *************** *************** *************** *************** ***********
>
> {
> // prepare 2 dimensional safearray
> SAFEARRAYBOUND rgsabound[2];
> rgsabound[0].lLbound = 0;
> rgsabound[0].cElements = 512;
> rgsabound[1].lLbound = 0;
> rgsabound[1].cElements = 512;
> *ppsa = SafeArrayCreate (VT_I4, 2, rgsabound);
> ...
> ...Filling the SafeArray with the desired Image Data....
> }
>
>[/color]
/*************** *************** *************** *************** ***************
*************** *************** *****[color=blue]
>
>
>
>
>
> -----------(Managed) C# Client ---------------------------------------
>
> private void GetImageData()
> {
> int[] lengthsArray = new int[2] { 512,512 };
> int[] boundsArray = new int[2] { 0 ,0};
>
> Array data = Array.CreateIns tance( typeof(int), lengthsArray,
> boundsArray );
>
> //----------------------------COM Call //
>
> m_theComServer. GetImageData(re f imagedata);
>
> //Here I get an exception!!!!!! !!!!!!!!!!!!!!! !!!//
> }
>
>[/color]

[Roland Moschel]

Re: Passing Safearray from unmanaged C++ to C#

Sorry, but I had a little Bug in my Posting...


-----------(Managed) C# Client ---------------------------------------

private void GetImageData()
{
...

m_theComServer. GetImageData(re f data ); <-----------

...
}

[Nicholas Paldino [.NET/C# MVP]]

Re: Passing Safearray from unmanaged C++ to C#

Roland,

Are you using VS.NET to create the .NET wrapper? Or are you using
TLBIMP, or are you coding the interface by hand?

--
- Nicholas Paldino [.NET/C# MVP]
- nick(dot)paldin o=at=exisconsul ting<dot>com

"Roland Moschel" <momu@gmx.de> wrote in message
news:lqo5ovc0oh i5130h9t4hc18ga h3p2p9sta@4ax.c om...[color=blue]
> Sorry, but I had a little Bug in my Posting...
>
>
> -----------(Managed) C# Client ---------------------------------------
>
> private void GetImageData()
> {
> ...
>
> m_theComServer. GetImageData(re f data ); <-----------
>
> ...
> }[/color]

[Roland Moschel]

Re: Passing Safearray from unmanaged C++ to C#

Hi Nicholas,

I tried both, using the VS.NET and tlbimp with and without /sysarray
But everything didn´t work.


Roland

On Tue, 7 Oct 2003 12:24:00 -0400, "Nicholas Paldino [.NET/C# MVP]"
<nicholas.paldi no@exisconsulti ng.com> wrote:
[color=blue]
>Roland,
>
> Are you using VS.NET to create the .NET wrapper? Or are you using
>TLBIMP, or are you coding the interface by hand?[/color]