从C DLL到.NET的接口 [英] Interface from a C DLL to .NET

问题描述

我有一个用C编写的遗留DLL，我想从C＃.NET应用程序调用。问题是C DLL的DLL接口相当复杂。这是这样的：

  __ declspec（dllexport）void __stdcall ProcessChunk（
 void * p_prochdl，
 const BIG_INPUT_STRC * p_inparams，
 BIG_OUTPUT_STRC * p_outparams 
）; 
  

BIG_INPUT_STRC / BIG_OUTPUT_STRC包含各种事物...缓冲区数组指针，枚举参数，整数参数等等。总之，它们很复杂。

第一个问题：有一个简单的方法来获取DLL头文件中包含的所有结构信息进入C＃类，还是需要将所有内容复制并粘贴到C＃并重新定义？这似乎是多余的。

相关的是，从C＃将结构传递到非托管DLL的正确方法是什么？

最后，是否有一个例子说明如何将缓冲区数组从C＃正确传递到非托管DLL？或者，如何将二维数组传递到DLL？

感谢
-Greg

解决方案

它很直接地用C＃中的P / Invoke来做这个软件。

我相信你会去必须手动定义C＃中的数据结构。

我会推荐你​​看看这个 MSDN文章上的主题

I have a legacy DLL written in C that I'd like to call from a C# .NET application. The problem is that the DLL interface for the C DLL is fairly complicated. It's something like this:

__declspec(dllexport) void __stdcall ProcessChunk(
    void *p_prochdl,
    const BIG_INPUT_STRC *p_inparams,
    BIG_OUTPUT_STRC *p_outparams
);

The BIG_INPUT_STRC/BIG_OUTPUT_STRC contain all kinds of things... pointers to buffer arrays, enumerated parameters, integer parameters, etc. In short, they're complicated.

First question: Is there an easy way to get all of the structure information that is contained in the DLL header file into the C# class, or do you need to literally copy and paste everything to C# and re-define it? This seems redundant.

Related to that, what is the correct way to pass structs into the unmanaged DLL from C#?

Finally, is there an example of how to correctly pass buffer arrays from C# into the unmanaged DLL? Alternatively, how can I pass a two-dimensional array into the DLL?

Thanks, -Greg

解决方案

Its quite straight forward to do this soft of thing in C# using P/Invoke.

I belive you are going to have to define the data structures in C# manually.

I would reccomend you take a look at this MSDN article on the subject

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