Cannot convert 'ref byte[]' to 'ref byte'
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From: Edwin on 11 Jun 2010 08:50 Just for the record, here's what I do: Header of the called function: public static int Function2(ref byte pBufData, uint nSize); So if I want to call this function and pass a byte array to it, I do this: private void Function1() { try { byte[] pBufData = new byte[50]; uint nSize = 0; // Fill up the pBufData with relevant data pBufData[0] = 0x34; ... // Calculate the size of the byte array ... // Call the function public static int Function2(ref pBufData[0], nSize); } catch (Exception ex) { Debug.WriteLine(ex.Message); } } HTH Cheers Pramod wrote: Cannot convert 'ref byte[]' to 'ref byte' 18-Sep-08 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 Previous Posts In This Thread: On Monday, September 15, 2008 11:12 AM kareem11 wrote: 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 Gr?sse / Best regards / Votre bien devoue Kerem G?mr?kc? 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(a)gmail.com> schrieb im Newsbeitrag news:e8712e86-9924-4c26-a4cd-e98a54a7ff1f(a)x16g2000prn.googlegroups.com... On Thursday, September 18, 2008 6:47 AM Pramod wrote: Cannot convert 'ref byte[]' to 'ref byte' 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 On Thursday, September 18, 2008 6:47 AM Jon Skeet [C# MVP] wrote: Re: Cannot convert 'ref byte[]' to 'ref byte' I do not think you want to be passing it by ref. Just pass the byte[] (which is a reference already) by value. Jon On Thursday, September 18, 2008 6:48 AM Pramod wrote: Re: Cannot convert 'ref byte[]' to 'ref byte' Thanks for your reply. I have tried passing it by value it still says that 'Cannot convert 'ref byte[]' to 'byte' On Thursday, September 18, 2008 6:48 AM Jon Skeet [C# MVP] wrote: Re: Cannot convert 'ref byte[]' to 'ref byte' On Sep 16, 4:39=A0pm, Pramod <ipra...(a)gmail.com> wrote: 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 Submitted via EggHeadCafe - Software Developer Portal of Choice WPF Binding Beyond the Limitation of Name Scopes http://www.eggheadcafe.com/tutorials/aspnet/ef583104-e507-491d-b05f-49faac8854c8/wpf-binding-beyond-the-li.aspx
From: Arne Vajhøj on 11 Jun 2010 19:45
On 11-06-2010 08:50, Edwin Decoene wrote: > Just for the record, here's what I do: > Cannot convert 'ref byte[]' to 'ref byte' > 18-Sep-08 My guess is that the poster has found a solution during those 1.5 year! Arne |