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Resolved When deploying a .NET Assembly (PB2017R3), what determines whether a structure will be internal or public?

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  1. Drew Buchanan
    Drew Buchanan
  2. PowerBuilder
  3. Monday, 1 July 2019 19:12 PM UTC

Related to: https://community.appeon.com/index.php/qna/q-a/pb2017r3-net-assembly-target-passing-structure-by-reference-in-public-function-causes-c-error-cs0051#reply-14144

When I try to deploy my .NET Assembly, I get the following error when trying to compile the generated C# code:

[CLASS_NAME]_[OBJECT_NAME]_wrapper.cs(1543,23): error CS0051:

Inconsistent accessibility: parameter type 'ref c__[STRUCTURE_NAME] []' is less accessible than method '[NAMESPACE].[OBJECT_NAME].[METHOD_NAME]([NAMESPACE].[STRUCTURE_2_NAME] [], string, ref c__[STRUCTURE_NAME] [], ref string)'

[STRUCTURE_NAME] when I looked at the generated C# was marked as internal, but the method was public. Which makes sense, that's what caused the Inconsistent accessibility error.

However, when I removed the offending method from my assembly and looked at the other structures in the assembly via the Visual Studio Object Explorer, those structures were public.

Is there a way within PowerBuilder to force those structures to be public to enable the C# to compile?

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Accepted Answer
Kevin Ridley
Kevin Ridley Accepted Answer Pending Moderation
  1. Wednesday, 3 July 2019 15:28 PM UTC
  2. PowerBuilder
  3. # Permalink

I'm not an assembly expert but I'll take a stab at this since it hasn't been answered yet.  Not sure why any PB developer would still be using structures in any newer development.  Just use a standard nvo with instance var attributes instead of the structure.  I think there was an effort to eliminate structures at one point, but probably left them for backward compatibility.  Remember all those "_____ (structure) will be implicitly private in the next release" messages back in the day when migrating or doing a full rebuild?  Anyway, it makes more sense to just use a nvo anyway, especially if you plan to reuse the assembly with anything other than PowerBuilder someday.  Only PB would ever know what a PB structure is.  You will probably want your assembly to be as generic as possible, so again, use a nvo with standard attributes.

 

Just my $.02

KR

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Drew Buchanan
  1. Drew Buchanan
  2. Wednesday, 3 July 2019 15:40 PM UTC
That definitely makes a lot of sense. I've actually only been working with PowerBuilder since the beginning of 2019, so I didn't do a lot of the migrating surrounding these objects.



Migrating this would be quite the pain, but it's better than just not being able to deploy the assembly.



Thanks
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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 3 July 2019 17:48 PM UTC
  2. PowerBuilder
  3. # 1

Hi Kevin;

  FWIW:  Just the reverse .. the only thing that you can pass between PB & C/C++ or C# is a structure. C & C# would not understand NVUO's. So using NVUO's as structures would limit you to only within the PB World.

Regards ... Chris

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