将返回 List<string> 的 C# 函数导入 Python

Question

我的目标是从 C# 函数中获取 Python (2.7) 中的字符串列表，它返回一个字符串列表。请看下面的代码。

C# 代码正在使用UnmanagedExports包。我要导入的功能：

using System;

using System.Collections.Generic;

using RGiesecke.DllExport;

using System.Runtime.InteropServices;

namespace GetInheritanceLib

{

public class Program

{

    [DllExport("GetInheritanceSource", CallingConvention = System.Runtime.InteropServices.CallingConvention.Cdecl)] 

    [return: MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.BStr, SizeParamIndex = 1)]

    public static List<string> GetInheritanceSource([MarshalAs(UnmanagedType.LPWStr)] string path)

    {

        List<string> inheritedFrom = new List<string>(); //some correct result of unknown length;

        return inheritedFrom;

    }

}

}

我尝试在 Python 中导入它：

import os

import ctypes

MyDLL = os.getcwd() + "\ConsoleApp3.dll"

my_dll_loaded = ctypes.cdll.LoadLibrary(MyDLL)

get_inheritance_source = my_dll_loaded.GetInheritanceSource 

path = "c:\\dev\\py\\proj"

c_path = ctypes.c_char_p(path)

get_inheritance_source.restype = ctypes.POINTER(ctypes.POINTER(ctypes.c_char_p)) # is it a list of strings?

get_inheritance_source.argtypes = [ctypes.c_char_p] # is it a ctring?

res = get_inheritance_source(c_path) # I expect this is a list of strings, but

我得到的错误：

File "C:/.../c_sharp.py", line .., in <module>

    res = get_inheritance_source(c_path)

WindowsError: [Error -532462766] Windows Error 0xE0434352

我不确定这些代码是否正确。请帮我把这一切放在一起。谢谢你。

Answer 1

我现在使用的 Python 代码：import osimport dotnetdotnet.add_assemblies(os.getcwd()) # a folder with DLLsdotnet.load_assembly('ConsoleApp3')import ConsoleApp3from ConsoleApp3 import Programpath = "c:\\dev\\py\\proj"res = Program.GetInheritanceSource(path)