在C＃问题中未管理到托管结构 [英] Unmanaged to managed structs in C# problem

问题描述

I'm receiving in c# a structure pointer from a c++ library callback


c++ structure

the packing is 1 

typedef 
{
int data1[8];
int data2[8];
int data3;
int data3;	
} SomeStruct;


in c# i have this equivalent 

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1), Serializable]
public struct SomeStruct
{
	[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
	public int[] data1
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
        public int [] data2;
        public int data3;
        public int data4;
};

我尝试过：

What I have tried:

var data contains the right IntPtr  

SomeStruct ss = (SomeStruct )Marshal.PtrToStructure(pointer, typeof(SomeStruct));

But im getting garbage, what im doing wrong?, thanks

推荐答案

您是否尝试过UnmanagedType。 LPArray属性？

Have you tried the UnmanagedType.LPArray attribute?

[MarshalAs(UnmanagedType.LPArray, SizeConst = 8)]
public int[] data1

这里的例子使用它：数组的默认封送 [ ^ ] - 搜索何时导入C风格的数组并查看Managed Signature下的示例

The example here uses it: Default Marshaling for Arrays[^] - search for "When a C-style array is imported" and look at the example under "Managed Signature"

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