C＃和C ++数组？ [英] C# to C++ Array?

问题描述

我提供了一个库，我知道使用C ++。
我导入的DLL这样：结果
函数[DllImport（PST）]私人静态外部INT pst_get_sensor（REF PSTSensor传感器）;
中的PSTSensor是一个结构，在C ++例如，它的定义是这样的：

I have a library provided, which i know uses C++. I imported the DLL as such:
[DllImport("pst")] private static extern int pst_get_sensor(ref PSTSensor sensor); The PSTSensor is a struct, in a C++ example it was defined as such:

struct PSTSensor
{
        char    name[80];       /**< Device name */
        int     id;             /**< Device identifier (for other tracking interfaces */
        float   pose[16];       /**< Device pose estimate as row-major matrix */
        double  timestamp;      /**< Time the data was recorded */
};

的问题是，除了一个int和一个双，它采用的是浮球，更重要的是一个数组的数组的东西C＃和C ++使用这个结构来调用 pst_get_sensor（参考传感器）的方式不同; 整个开发。运行代码时对我的环境崩溃

The problem is, that besides an Int and a Double, it uses a Float, and more importantly an array. An array is something way different between C# and C++. When using this struct to call pst_get_sensor(ref sensor); the entire development environment crashes on me when running the code.

目前，我做我的结构在C＃这样的：

I currently do my struct in C# like this:

struct PSTSensor{
        public char[] name;
        public int id;
        public float[] pose;
        public double timestamp;
    }

我的问题是，如何创建一个数组，C ++的理解，并正确返回？是这甚至可能吗？

My question is, how do i create an array that C++ understands, and properly returns? Is this even possible?

感谢很多提前，
笑脸

Thanks a lot in advance, Smiley

推荐答案

您的C＃结构需要定义内联数组的长度。和名称字段最好在C＃代码字符串声明。这使得它更容易让你使用它。

Your C# struct needs to define the inline array lengths. And the name field is best declared as a string in the C# code. That makes it much easier for you to work with it.

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
struct PSTSensor
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
    public string name;
    public int id;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public float[] pose;
    public double timestamp;
}

的结构布局属性是可选在这里，因为它只是重新状态的缺省值。但您可以选择保留它，以便明确了解你的意图。

The struct layout attribute is optional here, because it just re-states default values. But you may choose to keep it in order to be explicit about your intent.

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