c++ - 在结构内部编码结构的安全阵列

Question

我在 C++ 中有以下代码，我需要能够从 C# 调用它:

struct Inner
{
 double data1;
 double data2;
};

struct Outer
{
 double data3;
 SAFEARRAY innerData;
};

int WINAPI ProcessData (Outer& outer )
{
  ...
}

我尝试了以下方法，但没有用 我做错了什么？

[StructLayoutAttribute(LayoutKind.Sequential)]
public struct Inner 
{
 public double data1;
 public double data2;
}

[StructLayoutAttribute(LayoutKind.Sequential)]
public struct Outer 
{
 public double data3;
[MarshalAsAttribute(UnmanagedType.Safearray,ArraySubType = UnmanagedType.Struct)]
 public Inner[] innerData;
}

Answer 1

你试过吗？

  [StructLayoutAttribute (LayoutKind.Sequential)]
  public struct Outer
  {
     public double data3;
     [MarshalAsAttribute (UnmanagedType.SafeArray, SafeArrayUserDefinedSubType=typeof(Inner))]
     public Inner [] innerData;
  }