用C#构造元帅 [英] Struct marshal in C#

问题描述

我在C#中具有以下结构

I have the following struct in C#

unsafe public struct control
    {
        public int bSetComPort;
        public int iComPortIndex;
        public int iBaudRate;
        public int iManufactoryID;
        public byte btAddressOfCamera;
        public int iCameraParam;
        public byte PresetNum;
        public byte PresetWaitTime;
        public byte Group;
        public byte AutoCruiseStatus;
        public byte Channel;
        public fixed byte Data[64];
    }

我用来将其转换为字节数组[]的函数是

And the function i use to convert it to byte array[] is

 static byte[] structtobyte(object obj)
    {
        int len = Marshal.SizeOf(obj);
        byte[] arr = new byte[len];
        IntPtr ptr = Marshal.AllocHGlobal(len);
        Marshal.StructureToPtr(obj, ptr, true);
        Marshal.Copy(ptr, arr, 0, len);
        Marshal.FreeHGlobal(ptr);
        return arr;
    }

我编译时给出了

Type 'System.Byte[]' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed.

可能是什么问题? 预先感谢！

What can be the problem? Thanks in advance!

推荐答案

SizeOf在数组上不起作用.改为使用array.Length * Marshal.SizeOf(elementType).

SizeOf doesn't work on arrays. Use array.Length * Marshal.SizeOf(elementType) instead.

这篇关于用C#构造元帅的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！