使用Framework 4.0将结构从c ++传递到用c＃编写的LIB [英] Passing a structure from c++ into a LIB written in c# using Framework 4.0
问题描述
我对c＃了解不多，但我需要创建一个可以从c ++调用的c＃lib。 c＃中的函数需要接收数据结构。 我的代码如下：
I don't know much about c#, but I need to create a c# lib that can be called from c++. The functions in c# need to receive a structure of data. My code is listed below:
c ++ （LIB包含在项目中）
c++ (LIB is included in project)
struct Name
{
    char FileName [100];
    char FileVersion [100];
};
名称;
 名称和NBSP; szFile;
struct Name
{
char FileName[100];
char FileVersion[100];
};
Name;
Name szFile;
VisionScape Vs;
Vs.LoadCameraWithConfigFile（szFile）;
VisionScape Vs;
Vs.LoadCameraWithConfigFile( szFile);
c＃LIB
使用System;
使用System.Collections.Generic;
$
使用System.Linq;
使用System.Text;
使用System.Threading.Tasks;
使用System.Runtime.InteropServices;
命名空间MicroScanFrontRunner
{
  公共课VisionScape
{
[StructLayout（LayoutKind.Sequential，CharSet = CharSet.Ansi）]
public struct名称
{
[MarshalAs（UnmanagedType.ByValTStr，SizeConst = 100）]
公共字符串FileName;
[MarshalAs（UnmanagedType.ByValTStr，SizeConst = 100）]
public string FileVersion;
}
public int LoadCameraWithConfigFile（Name sName）
{
int值;
值= 2;
返回值;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
namespace MicroScanFrontRunner
{
public class VisionScape
{
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct Name
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
public string FileName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
public string FileVersion;
};
public int LoadCameraWithConfigFile( Name sName )
{
int value;
value = 2;
return value;
}
}
}
我收到以下编译错误：
严重性  代码    描述    项目    文件    线   抑制状态
错误   C2664   'int MicroScanFrontRunner :: VisionScape :: LoadCameraWithConfigFile（MicroScanFrontRunner :: VisionScape :: Name）'：无法将参数1从'InitializeScanner :: Name'转换为'MicroScanFrontRunner :: VisionScape :: Name'
MicroScan C：\ Users\efthss \Desktop \Plant Moves \MicroScan Vision \C dll \MicroScanCamreaGige \ MicroScan.cpp   100  
Severity Code Description Project File Line Suppression State
Error C2664 'int MicroScanFrontRunner::VisionScape::LoadCameraWithConfigFile(MicroScanFrontRunner::VisionScape::Name)': cannot convert argument 1 from 'InitializeScanner::Name' to 'MicroScanFrontRunner::VisionScape::Name'
MicroScan C:\Users\efthss\Desktop\Plant Moves\MicroScan Vision\C dll\MicroScanCamreaGige\MicroScan.cpp 100
推荐答案
您无法从C ++代码创建C＃类。这不是受支持的情况。除非你使用C ++ / CLI，否则你也不能走另一条路。你的选择有限。第一个选项是在C＃代码中实现COM接口，然后在C ++应用程序中将代码加载
作为COM。这就像使用C＃类一样接近。另一种方法是定义您的本机代码调用的可以指向托管函数的回调。
You cannot create C# classes from C++ code. This is not a supported situation. Nor can you go the other way unless you're using C++/CLI. You have limited options. The first option is to implement a COM interface in your C# code and then load the code in your C++ app as COM. This is as close to using a C# class as you can get. The alternative approach is to define callbacks that your native code calls that can point to a managed function.
另请注意，您不能简单地在C ++代码中加载C＃程序集。必须运行CLR才能支持托管代码。听起来你需要在这里使用COM。请注意，您可以在托管进程中加载本机DLL，这支持
，但您可以采用另一种方式。
Also note that you cannot simply load a C# assembly in C++ code. The CLR has to be running to support managed code. It really sounds like you need to be using COM here. Note that you can load native DLLs inside a managed process and this is supported but you're going the other way here.
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