马歇尔结构数组

本文介绍了马歇尔结构数组的处理方法，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

我花了很多时间寻找解决方案，但仍然找不到答案.

I've spent a lot of time to look for the solution but still don't find it out.

我有2个课程:

[StructLayout(LayoutKind.Sequential)] public class Result { public int Number; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)] public string Name; public int Size; } [StructLayout(LayoutKind.Sequential)] public class CoverObject { public int NumOfResults; [MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 4)] public Result[] Results; }

我期望命令 Marshal.SizeOf(typeof(CoverObject))将返回52，但不会返回20，因此，我以后使用的所有marshall和unmarshall均无法正常工作.

My expectation that the command Marshal.SizeOf(typeof(CoverObject)) will return 52, but not, it's just 20. Thus, all of marshall and unmarshall that I use later are not working.

似乎只计算Result类中的第一个成员(数字).我做错了什么吗?

Seeming it only counts the first member (Number) in Result class. Did I do anything wrong?

推荐答案

将类更改为结构

[StructLayout(LayoutKind.Sequential)] public struct Result { public int Number; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)] public string Name; public int Size; } [StructLayout(LayoutKind.Sequential)] public struct CoverObject { public int NumOfResults; [MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 4)] public Result[] Results; }

其他地方:

Marshal.SizeOf(typeof(CoverObject)) // it will return 52