using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using RGiesecke.DllExport;
namespace ContosoCom
{
public static class Exports
{
[DllExport(CallingConvention = CallingConvention.Cdecl)]
public static void GetClass([Out] [MarshalAs((UnmanagedType.Interface))] out IMyClass pInterface)
{
pInterface = new MyClass();
}
}
[ComVisible(true)]
[System.Runtime.InteropServices.InterfaceTypeAttribute(System.Runtime.InteropServices.ComInterfaceType.InterfaceIsIUnknown)]
public interface IMyClass
{
void DisplayMessageBox([MarshalAs(UnmanagedType.BStr)] string Text);
void GetTicksAndDate([Out] out MyStruct Structure);
}
[ComVisible(true)]
[StructLayout(LayoutKind.Sequential, Pack = 8)]
public struct MyStruct
{
public long TicksOfNow;
public int Day;
public int Month;
public int Year;
}
[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(IMyClass))]
public class MyClass : IMyClass
{
public void DisplayMessageBox(string Text)
{
MessageBox.Show(Text);
}
public void GetTicksAndDate(out MyStruct Structure)
{
Structure.TicksOfNow = DateTime.Now.Ticks;
Structure.Day = DateTime.Now.Day;
Structure.Month = DateTime.Now.Month;
Structure.Year = DateTime.Now.Year;
}
}
}
这就是C代码的样子：
#include "stdafx.h"
#import "..\..\bin\Debug\ContosoCom.tlb" auto_rename
using namespace ContosoCom;
typedef void(*pGetClass)(IMyClass **iMyClass);
int _tmain(int argc, _TCHAR* argv[])
{
pGetClass getClass = NULL;
IMyClass *mc = NULL;
HINSTANCE hDLL = 0;
// load the DLL
hDLL = ::LoadLibrary(L"ContosoCom.dll");
::CoInitialize(NULL);
if(!hDLL)
{
printf("ERROR: Unable to load library ContosoCom.dll\n");
return -1;
}
//
// TO DO: Add code here to get an instance of MyClass
//
getClass = (pGetClass)GetProcAddress(hDLL, "GetClass");
if(!getClass)
{
printf("ERROR: Unable to find entry for GetClass()\n");
return -1;
}
getClass(&mc);
// At this point we do not have how to get a pointer even with the libray loaded
// End of TO DO
if(!mc)
{
printf("ERROR: Unable to get a pointer for MyClass\n");
return -1;
}
mc->DisplayMessageBox("Hello World from native to .NET without registration");
MyStruct st;
ZeroMemory(&st, sizeof(MyStruct));
mc->GetTicksAndDate(&st);
printf("Ticks %I64i\n",st.TicksOfNow);
printf("Today is %i/%i/%i\n",st.Month,st.Day,st.Year);
printf("SUCCESS: Leaving gracefully\n");
return 0;
}
2 回答
是 .
这里有一篇MSDN有一篇文章（来自2005年），它通过以下工作示例：
Daryn，
此博客文章向您解释如何执行此操作：http://blogs.msdn.com/b/rodneyviana/archive/2015/08/24/pure-native-c-consuming-net-classes-without-com-registration.aspx
基本上你使用一个入口点返回指向接口的指针（使用DllExport Nuget进行“导出”）：
}
这就是C代码的样子：