c# - 导入返回列表的 C# 函数到 Python

Question

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

C# 代码使用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

我不确定这段代码是否正确。请帮我把它们放在一起。谢谢你。

标签： c#python

Answer 1

PyDotNet帮助我解决了这个问题。

我现在使用的 Python 代码：

import os
import dotnet

dotnet.add_assemblies(os.getcwd()) # a folder with DLLs
dotnet.load_assembly('ConsoleApp3')

import ConsoleApp3
from ConsoleApp3 import Program
path = "c:\\dev\\py\\proj"
res = Program.GetInheritanceSource(path)