How can I call a .NET DLL from an Inno Setup script?

 

I want to call a function from a .NET DLL (coded in C#) from an Inno Setup script.

I have:

  • marked the Register for COM interop option in the project properties,
  • changed the ComVisible setting in the AssemblyInfo.cs file,
  • added these lines to the ISS script:

    • [Files]

    Source: c:temp1MyDLL.dll; Flags: dontcopy

    [Code]

    function MyFunction(): string;

    external 'MyFunction@files:MyDLL.dll stdcall setuponly';

    but I still get the following error:

    Runtime Error (at -1:0):

    Cannot Import dll:C:DOCUME~1fooLOCALS~1Tempis-LRL3E.tmpMyDLL.dll.

    What am I doing wrong?

    Oops, my bad, it's been too long since I've read pascal! So, if you need to get the value then there are a couple of possibilities:

  • Write the functionality in C/C++ and export the function, that's definitely supported.
  • Use a Managed C++ dll to shim to your .NET dll, and expose the call as a C interface point (this should work, but it's getting messy)
  • Use an .exe to store the result of your code in a .INI file or the registry or in a temp file and read the result in the setup code section (this is now properly nasty)

    • When I last worked with InnoSetup it didn't support your scenario directly (calling .NET code from setup).

    Intenta de esta manera (Try this way): 

    Var
 obj: Variant
 va: MyVariableType;
Begin
 //Starting
 ExtractTemporaryFile('MyDll.dll');
 RegisterServer(False, ExpandConstant('{tmp}MyDll.dll'), False);
 obj := CreateOleObject('MyDll.MyClass');
 //Using
 va := obj.MyFunction();
 //Finishing
 UnregisterServer(False, ExpandConstant('{tmp}MyDll.dll'), False);
 DeleteFile('{tmp}MyDll.dll');
End;

    Suerte (good luck)

    You're trying to import a C-style function from your .NET dll - this doesn't really have anything to do with COM interop. COM interop allows you to activate your .NET objects as COM objects, it doesn't expose them as C/C++ exported functions/types.

    If your function doesn't need to return any data, why not make a simple .exe that calls your function and just run that from your setup?

    Also: See the innosetup support newsgroups where you might get better support.

    链接地址: http://www.djcxy.com/p/44510.html

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