Question

C# 与C++传值问题

C++结构体：
typedef struct GY7502_DATA_INFO{
BYTE Databuffer[256];//buffer to write or read
UINT WriteNum;//Valid num in Databuffer[]
UINT ReadNum;// data num to Read
BYTE IoSel;//bit value=1 means selected. bit0 for IO-PORT0, bit1 for IO-PORT1
BYTE IoData;//only the bit will be valid which bit is 1 in IoSel.
BYTE ChipSelect;//Chip Selected,output, 0~CS0, 1~CS1
BYTE Reserved[4];//Reserved
}GY7502_DATA_INFO,*pGY7502_DATA_INFO;
C#的结构体：
[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
public struct GY7502_DATA_INFO
{
/// <summary>
/// 地址和数据
/// </summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
public byte[] Databuffer;
/// <summary>
/// 地址和数据的总个数
/// </summary>
public int WriteNum;
/// <summary>
/// 需要读的数据个数
/// </summary>
public byte ReadNum;
/// <summary>
/// IO口选择
/// </summary>
public byte IoSel;

public byte IoData;
/// <summary>
/// 片选输出选择 值：0、1
/// </summary>
public byte ChipSelect;

[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] Reserved;
}

请问对不对啊？

Answer 1

建议你byte数组用指针的方法传递，并且要注意的是指针的大小（数组长度）要保持一致，否则会出异常。