元帅C ++＆QUOT;串＆QUOT;在C＃中的P / Invoke类 [英] Marshal C++ "string" class in C# P/Invoke

问题描述

我在定义一个本地DLL中的函数如下：

I have a function in a native DLL defined as follows:

#include <string>
void SetPath(string path);

我试图把这个微软的P /调用互操作助理，但它闷死在字符串级（我认为这是从MFC？）。

I tried to put this in Microsoft's P/Invoke Interop Assistant, but it chokes on the "string" class (which I think is from MFC?).

我试图封送它作为各种不同类型的（C＃字符串和char []，byte []的），但每次我要么得到一个NotSupportedException异常或本地大会异常（这取决于封送我试过）。

I have tried marshaling it as a variety of different types (C# String, char[], byte[]) but every time I either get a NotSupportedException or a Native Assembly Exception (depending on what marshaling I tried).

由于有人曾经做过本地/管理的互操作，其中本地字符串类用于？有什么办法元帅呢？我是不是有写我自己的封送拆？

As anyone ever done Native/Managed Interop where the native string class is used? Is there any way to Marshal this? Am I going to have to write my own Marshaler?

推荐答案

看起来你试图使用C ++标准库的string类。我怀疑，这将是很容易元帅。最好坚持使用一个char *元帅为StringBuilder的。这就是我通常做。你必须添加一个包装器，生成的C ++字符串为您服务。

Looks like you're trying to use the C++ standard library string class. I doubt that will be easy to Marshal. Better to stick with a char * and Marshal as StringBuilder. That's what I usually do. You'll have to add a wrapper that generates the C++ string for you.

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