c++调用c#代码

// ConsoleApplication1.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。

//

#include "pch.h"

#include <iostream>

#include <metahost.h>

#include <atlbase.h>

#include <atlcom.h>

#pragma comment(lib, "mscoree.lib")

#define IfFailRet(expr)                { hr = (expr); if(FAILED(hr)) return (hr); }

#define IfNullFail(expr)                { if (!expr) return (E_FAIL); }

extern "C" int __declspec(dllexport) CALLBACK CallClrMethod(

    const WCHAR *miniRuntimeVersion,

    const WCHAR *assemblyName,

    const WCHAR *typeName,

    const WCHAR *methodName,

    const WCHAR *args,

    LPDWORD pdwResult

)

{

    int hr = S_OK;

    CComPtr<ICLRMetaHost> spHost;

    hr = CLRCreateInstance(CLSID_CLRMetaHost, IID_PPV_ARGS(&spHost));

    CComPtr<ICLRRuntimeInfo> spRuntimeInfo;

    CComPtr<IEnumUnknown> pRunTimes;

    IfFailRet(spHost->EnumerateInstalledRuntimes(&pRunTimes));

    ICLRRuntimeInfo *pUnkRuntime = NULL;

    ULONG fetched = ;

    wchar_t version[];

    DWORD versionStringSize = ;

    while (S_OK == pRunTimes->Next(, (IUnknown **)&pUnkRuntime, &fetched))

    {

        if (fetched <=  || pUnkRuntime == nullptr)

            break;

        hr = pUnkRuntime->GetVersionString(version, &versionStringSize);

        if (versionStringSize >=

            && (int)version[] >= (int)miniRuntimeVersion[]

            && (int)version[] >= (int)miniRuntimeVersion[]

            && (int)version[] >= (int)miniRuntimeVersion[]) {

            CComQIPtr<ICLRRuntimeInfo> pp(pUnkRuntime);

            spRuntimeInfo = pp;

            break;

        }

    }

    IfNullFail(spRuntimeInfo);

    BOOL bStarted;

    DWORD dwStartupFlags;

    hr = spRuntimeInfo->IsStarted(&bStarted, &dwStartupFlags);

    CComPtr<ICLRRuntimeHost> spRuntimeHost;

    IfFailRet(spRuntimeInfo->GetInterface(CLSID_CLRRuntimeHost, IID_PPV_ARGS(&spRuntimeHost)));

    if (!bStarted)

        hr = spRuntimeHost->Start();

    hr = spRuntimeHost->ExecuteInDefaultAppDomain(

        assemblyName,

        typeName,

        methodName,

        args,

        pdwResult);

    return hr;

}

int main()

{

    DWORD dwResult;

    HRESULT hr = CallClrMethod(

        L"4.0",

        L"ClassLibrary1.dll",  // name of DLL (can be fullpath)

        L"ClassLibrary1.Class1",  // name of managed type

        L"ManagedMethodCalledFromExtension", // name of static method

        L"some args xx",

        &dwResult);

    return ;

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ClassLibrary1

{

    public class Class1

    {

        /// <summary>

        /// a managed static method that gets called from native code

        /// </summary>

        public static int ManagedMethodCalledFromExtension(string args)

        {

            // need to return an integer: the length of the args string

            return args.Length * ;

        }

    }

}

此项目加入了Reactor加壳保护，在编译后事件中添加命令：

"C:\Program Files (x86)\Eziriz\.NET Reactor\dotNET_Reactor.Console.exe" -file "$(TargetPath)" -targetfile "<AssemblyLocation>\<AssemblyFileName>"