//
#include "stdafx.h"
#define EXPORT_DLL extern "C" __declspec(dllexport)
//暴露的方法调用
EXPORT_DLL int Add(int a,int b)
{
return a + b;
}
//返回数据结构定义
struct Bar
{
public :
int id;
char* name;
};
//使用引用返回结构
EXPORT_DLL void GetBar(Bar& bar)
{
//Bar b;
bar.id = 10;
bar.name = "hi bar 中文了";
//bar = b;
}
//返回类
class Foo
{
public :
int id;
char* name;
};
//引用返回类
EXPORT_DLL void GetFoo(Foo& foo)
{
foo.id = 100;
foo.name = "I'm 傻瓜";
}
这是我的源代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication1
{
[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct Bar
{
/// int
public int id;
/// char*
[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
public string name;
}
[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct Foo
{
/// int
public int id;
/// char*
[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
public string name;
}
class Program
{
[DllImport("CppDll.dll", EntryPoint = "Add")]
extern static int Add(int a, int b);
[DllImport("CppDll.dll", EntryPoint = "GetBar", CharSet = CharSet.Ansi)]
extern static void GetBar(ref Bar bar);
[DllImport("CppDll.dll", EntryPoint = "GetFoo", CharSet = CharSet.Ansi)]
extern static void GetFoo(ref Foo foo);
static void Main(string[] args)
{
Console.WriteLine(Add(5, 4));
Bar b = new Bar();
GetBar(ref b);
Console.WriteLine("b's id is " + b.id);
Console.WriteLine("b's name is " + b.name);
Foo f = new Foo();
GetFoo(ref f);
Console.WriteLine("f's id is " + f.id);
Console.WriteLine("f's name is " + f.name);
Console.Read();
}
}
}
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