我一直在尝试链接一些 c++ 代码并将其包装在 COM 对象中以通过 C# 访问。我创建了一个 atl 项目并添加了一个简单的方法,例如 Add(double a, double b)。以下是我的 atl.h 文件中的代码:
// atl.h : Declaration of the Catl
#pragma once
#include "resource.h" // main symbols
#include "com_i.h"
#if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)
#error "Single-threaded COM objects are not properly supported on Windows CE platform, such as the Windows Mobile platforms that do not include full DCOM support. Define _CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA to force ATL to support creating single-thread COM object's and allow use of it's single-threaded COM object implementations. The threading model in your rgs file was set to 'Free' as that is the only threading model supported in non DCOM Windows CE platforms."
#endif
// Catl
class ATL_NO_VTABLE Catl :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<Catl, &CLSID_atl>,
public Iatl
{
public:
Catl()
{
}
DECLARE_REGISTRY_RESOURCEID(IDR_ATL)
DECLARE_NOT_AGGREGATABLE(Catl)
BEGIN_COM_MAP(Catl)
COM_INTERFACE_ENTRY(Iatl)
END_COM_MAP()
DECLARE_PROTECT_FINAL_CONSTRUCT()
HRESULT FinalConstruct()
{
return S_OK;
}
void FinalRelease()
{
}
public:
STDMETHOD(Add)(DOUBLE a, DOUBLE b);
};
OBJECT_ENTRY_AUTO(__uuidof(atl), Catl)
以下来自atl.cpp文件
// atl.cpp : Implementation of Catl
#include "stdafx.h"
#include "atl.h"
STDMETHODIMP Catl::Add(DOUBLE a, DOUBLE b)
{
// TODO: Add your implementation code here
return a + b;
}
在我的 c# 文件中,我正在调用 dll ......在我引用它之后......它看到了 dll,但没有看到分配的方法。这是我的问题。这是来自 program.cs 的代码
sing System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace sharpdll
{
class Program
{
[DllImport("com.dll")]
public static extern double Add(double a, double b);
static void Main(string[] args)
{
Add(2, 3);
}
}
}
在 Add(2, 3) 处调试中断;显示“无法在 DLL 'com.dll' 中找到名为 'Add' 的入口点。” 有任何想法吗?