将复杂数据结构从C#传递到本机dll

// MyNativeLib.h
#ifdef MYNATIVELIB_EXPORTS
#define MYNATIVELIB_API __declspec(dllexport)
#else
#define MYNATIVELIB_API __declspec(dllimport)
#endif

extern "C" MYNATIVELIB_API void ProcessData(MyDataStruct* data);

struct MyDataStruct {
    int id;
    double value;
    char name[100];
};

using System;
using System.Runtime.InteropServices;

public struct MyDataStruct
{
    public int id;
    public double value;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
    public string name;
}

class Program
{
    [DllImport("MyNativeLib.dll", CallingConvention = CallingConvention.Cdecl)]
    public static extern void ProcessData(ref MyDataStruct data);

    static void Main()
    {
        MyDataStruct data = new MyDataStruct
        {
            id = 1,
            value = 3.14,
            name = "Test"
        };

        ProcessData(ref data);
        Console.WriteLine($"Processed data: ID={data.id}, Value={data.value}, Name={data.name}");
    }
}