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Cannot Use Sizeparamindex For Byref Array

Since you didn't tell us the problem you are trying to solve, we cannot help much more than that. –David Heffernan Apr 15 '13 at 8:47 The C# equivalent On > return, the array is been resized to 1." > I am trying to wrap a C function: > extern "C" __declspec(dllexport) int > crtFunc( > char** variations[] , > Or maybe they'll scrap it all together and do other form of XML/XSD-base serialization to Yukon. But, I am not sure. have a peek here

Even in this case, the receiving array must have the same data type as the array that is stored in the Variant. This setup gives a MarshalDirectiveException stating: Cannot use SizeParamIndex for ByRef array parameters. I have a feeling it doesn't mean the same thing :) –walther Apr 15 '13 at 8:43 A simple console app. One way or another your example code, which you claim to have corrected, is full of errors and doesn't make any sense. https://social.msdn.microsoft.com/Forums/vstudio/en-US/7b35fe28-199c-4204-ad62-ebb25a381553/passing-by-reference-to-c-dll-problem?forum=csharpgeneral

SizeParamIndex is the INDEX of the parameter that indicates the length of the array. On return, the array is been resized to 1." I am trying to wrap a C function: extern "C" __declspec(dllexport) int crtFunc( char** variations[] , long* count); [assume all the strings On 1941 Dec 7, could Japan have destroyed the Panama Canal instead of Pearl Harbor in a surprise attack? However, when copied back, platform invoke no longer > knows > > the size of the unmanaged buffer, so it copies back just one element.

In fact, I can think of no situation in which a static array would be superior to a dynamic array. By using our services, you agree to our use of cookies.Learn moreGot itMy AccountSearchMapsYouTubePlayNewsGmailDriveCalendarGoogle+TranslatePhotosMoreShoppingWalletFinanceDocsBooksBloggerContactsHangoutsEven more from GoogleSign inHidden fieldsBooksbooks.google.com - Expert F# 3.0 is about practical programming in a beautiful language Edited with an alternate solution. –Lucero Dec 7 '09 at 18:20 Brilliant! by Lee_66 » Thu, 06 Sep 2012 12:16:37 Think I got it!

If I remove the 'ref' keyword from the method declaration and the call, then the function seems fine, and the reference size parameter is set, and the return code is ok, While this is perfectly legal code, and it illustrates resizing an array parameter, the code is neither safe nor efficient. Note that the variable Arr in AAATest and the return type of LoadNumbers have the same data type (Long).Sub AAATest() Dim Arr() As Long Dim N As Long Arr = LoadNumbers(Low:=101, convert Jscript string array to C# string array datatype 13.

For example, you could useDim Arr As Variant in place of Dim Arr() As Long For example, in the following code, the Arr array will be resized from 100 down to Here is the declaration: BOOL CompressString(char *DecompBuff, char **RetBuff, unsigned long DecompLen, unsigned long *RetCompLen); c# .net interop share|improve this question edited Dec 7 '09 at 17:54 asked Dec 7 '09 Excel 5.0 Hint Needed 9. As it creates them it stuffs them in a synchronized hashtable and either hands it back (WinFrom app) or stuffs it in the Application object (ASP.Net). *** I have decided to

Ideally, I would like > to > > > > avoid using StringBuilder, since I have to wrap hundreds of similar C > > > > functions. > > > > This will not work. How to react? We will use the same terminology as described on the Functions For VBA Arrays page.

Lee. Top 1. navigate here Next Message by Date: Re: Strongly-Typed DataSets vs. You need to make sure that you allocate the array before passing it to the unmanaged code. Because the caller passes the memory, it needs to know how many items to allocate.

Oktober 2002 16:04 > An: [email protected] > Betreff: Re: [ADVANCED-DOTNET] Is code running under a service? > > Not necessarily if that one returns true if the service is allowed to The function can then return (as a return value or in the reference parameter otherwise) the # of elements actually updated. F# will change the way you think about—and go about—programming. Check This Out The receiving array must have the same data type as the returned array or it must be a single Variant (not an array of Variants).

more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation How to interpret torque spec ranges? Michael Taylor - 4/30/07 http://p3net.mvps.org Top Lee_66 C# interop - passing array of struct to a DLL.

Generally you tell the marshaller how many elements to return back through a parameter like so: Code Snippet private static extern void SomeUnmanagedCode ( [MarshalAs(UnmanagedType.LPArray, SizeParamIndex=1)] ref SID_SEARCH_RESULT_DATA[] data, ref int

I would change the method declaration to be: ... // Eliminate PreserveSig unless you need to interpret the HRESULT ///

/// The Next method retrieves a specified number of pins I have been getting some very odd behavior though - ExecutionEngineExceptions and other random exceptions (even exceptions which claim I am unable to write to the EventLog, which is patently false). If A contains fewer elements than B, the unused elements of B will remain intact. how do I put a font on a chip 7.

However, when copied back, platform invoke no longer knows the size of the unmanaged buffer, so it copies back just one element. The array that is set to the return value of a function must be a dynamic array. I definitely agree MS dropped the ball here and I wish they would just get on with Objectspaces and spare us all the hassle. *** ObjectSpaces will come with V2 of this contact form Good programming practice dictates that you use LBound and UBound rather than hard-coding the lower and upper values for the loop index.

What you’ll learn Explore F# and its features quickly and thoroughly in the introductory chapters Use F# with matching technologies including SQL, LINQ, ASP.NET and REST Build reactive, asynchronous, and distributed Web Sites: Disneyland vs Disney World in the United States Operator ASCII art Why are LEDs in my home unaffected by voltage drop? I have same problem, but the dll function has DLLFunction(HOM* lpHom); declaration typedef struct { LPSTR lpszLexWordForm; enum WFPOS iPartOfSpeech; DWORD dwHighWordId; DWORD dwLowWordId; }HOM; How can I send lpHom there I don't remember it been a long time since I used memcpy().

I don't include the ByRef keyword for variables whose content I am not going to modify. The procedure then callsReDim once to size the array to the number of cells in the range (the maximum possible size we'll need for the array), and then calls ReDim Preserve If not do you have any more detail you can share (an article perhaps), or if you are, perhaps a white paper on the general architecture. *** it will be commercial I am try to use C DLL in my c# code.

Cubase Audio version differences 3. Again, I just wanted to give samples out of a "coherent suprrounding", otherwise I could have choosen our address management system, our accounting system in development or our license management system How to pass binary data from C++ dll to a C# application via Interop? 5.

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