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Dynamically loading XSharp assemblies 26 Jan 2017 16:22 #1035

ArneOrtlinghaus
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Posts: 337

When trying to load XSharp assemblies with the command VulcanLoadLibrary I received error messages. When substituting this by the function below it works, at least for assemblies without the automatically called init procedures.

But I have seen that it is better to call all initialization manually in the program.
I have seen that runtime errors in the init procedures are very hard to identify, whereas when calling them in the program the runtime errors are displayed with reasonable messages on the screen.

function xsLoadLibrary(libPath as string) as System.Reflection.Assembly
local pdll as System.Reflection.Assembly
pdll := System.Reflection.Assembly.LoadFrom(libPath)
return pdll

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Dynamically loading XSharp assemblies 26 Jan 2017 17:31 #1039

Chris

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Posts: 3750

Hi Arne,

Thanks for reporting this, it is a bug (well, compatibility issue) in the compiler, as it generates assemblies with slightly different layout than VulcanLoadLibrary() expects. Should be easy enough to fix.

Chris

XSharp Development Team
chris(at)xsharp.eu

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Dynamically loading XSharp assemblies 26 Jan 2017 17:31 #1040

wriedmann

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Posts: 3245

Hi Arne,

use Reflection! Since X# currently does not need initializations like the Vulcan runtime, you should be able to do it.

I'm doing this regularly:

foreach cDLLName as string in oDLLs
  cFullPath := Path.Combine( cPath, cDLLName )                           
  oAssembly := Assembly.LoadFrom( cFullPath )
  oClasses := Utility.AssemblyClasses( oAssembly, "ProdConfigBase.IConfiguration" )
  foreach cClassName as string in oClasses
    oConfiguration := ( IConfiguration ) oAssembly:CreateInstance( cClassName )
    if oConfiguration != null
      ++nLoaded
      oConfiguration:Initialize( oWindow, ProgSettings.Language )
      if oConfiguration:LastException != null
        MessageBox.Show( string.Format( e"Error loading configuration DLL {0}\n\n{1}\n\n{2}", cDLLName, oConfiguration:LastException:Message, oConfiguration:LastException:StackTrace ) )  
      endif
      ProgSettings.ProduktConfigurations:Add( oConfiguration )
    endif
  next
next

Wolfgang

Wolfgang Riedmann
Meran, South Tyrol, Italy

www.riedmann.it - docs.xsharp.it

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