Cannot convert 'ref byte[]' to 'ref byte'

[Pramod]

Hi.

I have a C++ method which accepts - byte* - and I am calling this
method from a C# application. I have created a byte[] to pass by ref.
This is how I call the C++ method:

Method(ref byteArray);

However, this results in following error:
Cannot convert 'ref byte[]' to 'ref byte'

Here is my C++ method declaration:
Method(byte* byteData);


Please let me know how do I pass the byte[] to this method.

Thanks in advance,
PSI

[Jon Skeet [C# MVP]]

Re: Cannot convert 'ref byte[]' to 'ref byte'

On Sep 15, 3:50 pm, Pramod <ipra...@gmail. comwrote:

I have a C++ method which accepts - byte* - and I am calling this
method from a C# application. I have created a byte[] to pass by ref.

I don't think you want to be passing it by ref. Just pass the byte[]
(which is a reference already) by value.

Jon

[=?iso-8859-1?B?S2VyZW0gR/xtcvxrY/w=?=]

Re: Cannot convert 'ref byte[]' to 'ref byte'

Hi,

there are a couple of things that can
go wrong here:

1.) Is it a IN or OUT parameter, e.g. does
the function write to the pointer or does it
expect something to go in to the function?

2) which implies that the byte[] size is unknown.

So the questions are the following. Do you
expect something from the function written
back to the pointer or does the function expect
a ready filled array to operate on it?

Depending on your answer we will find a
appropriate solution for you,...

Regards

Kerem


--
-----------------------
Beste Grüsse / Best regards / Votre bien devoue
Kerem Gümrükcü
Latest Project: http://www.codeplex.com/restarts
Latest Open-Source Projects: http://entwicklung.junetz.de
-----------------------
"This reply is provided as is, without warranty express or implied."
"Pramod" <ipramod@gmail. comschrieb im Newsbeitrag
news:e8712e86-9924-4c26-a4cd-e98a54a7ff1f@x1 6g2000prn.googl egroups.com...

Hi.
>
I have a C++ method which accepts - byte* - and I am calling this
method from a C# application. I have created a byte[] to pass by ref.
This is how I call the C++ method:
>
Method(ref byteArray);
>
However, this results in following error:
Cannot convert 'ref byte[]' to 'ref byte'
>
Here is my C++ method declaration:
Method(byte* byteData);
>
>
Please let me know how do I pass the byte[] to this method.
>
Thanks in advance,
PSI

[Pramod]

Re: Cannot convert 'ref byte[]' to 'ref byte'

On Sep 15, 8:12 pm, "Jon Skeet [C# MVP]" <sk...@pobox.co mwrote:

On Sep 15, 3:50 pm, Pramod <ipra...@gmail. comwrote:
>

I have a C++ method which accepts - byte* - and I am calling this
method from a C# application. I have created a byte[] to pass by ref.

>
I don't think you want to be passing it by ref. Just pass the byte[]
(which is a reference already) by value.
>
Jon

Thanks for your reply. I have tried passing it by value it still says
that 'Cannot convert 'ref byte[]' to 'byte'

[Jon Skeet [C# MVP]]

Re: Cannot convert 'ref byte[]' to 'ref byte'

On Sep 16, 4:39 pm, Pramod <ipra...@gmail. comwrote:

Thanks for your reply. I have tried passing it by value it still says
that 'Cannot convert 'ref byte[]' to 'byte'

If you haven't got the "ref" keyword in the method call, that sounds
very unlikely. The method you're calling should (by the sounds of it)
probably be declared to take byte[] rather than byte though. Did you
by any chance change the C++ instead of the calling code?

Jon