Marshaling C++ struct with fixed size array into C#(将具有固定大小数组的 C++ 结构编组到 C#)

本文介绍了将具有固定大小数组的 C++ 结构编组到 C#的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

I have a C# struct declared like so:

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

And it's C++ counterpart:

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

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?

解决方案

Try to marshal it as ByValArray:

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

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

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