将具有固定大小的数组的C ++结构编组到C#中

问题描述

我有一个这样声明的C#结构:

I have a C# struct declared like so:

public struct AdvertisementData {
    public byte SomeId;
    [MarshalAs(UnmanagedType.LPArray , SizeConst = 12)]
    public byte[] AnArray;
  }

与C ++相对应:

struct AdvertisementData {
  uint8_t SomeId;
  uint8_t AnArray[12];
};

当我尝试将对上述结构的堆栈分配实例的引用从C ++发送到C#时，我得到:"Byte []类型的结构字段不能编组为LPArray."知道我在做什么错吗?

When I try to send a reference to a stack-allocated instance of the above struct from C++ to C#, I get: "Structure field of type Byte[] can't be marshalled as LPArray."Any idea what I'm doing wrong?

推荐答案

尝试将其封送为ByValArray:

Try to marshal it as ByValArray:

 [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
  public byte[] AnArray;

而且，您确定不需要设置任何 LayoutKind 用于您的结构?

And also, are you sure that you do not need to set any LayoutKind for your struct?

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