如何将带有2维整数和双数组的结构从C＃传递给C ++ DLL [英] How to pass struct with 2 dimension integer and double array from C# to C++ DLL
问题描述
我的vc ++ dll低于struct
struct Value
{
int RunInchMm;
int transform_order;
int rotation_ang;
int rotation_org [2] [2];
int mirror_xchg_code;
int absincmode;
double WCS [6] [4];
};
我使用这个结构作为我的vc ++ dll函数的参数，我在这里读取结构中的所有值。
我从c＃application& amp中调用这个Dll及其函数。从C＃应用程序传递值到结构，但我没有得到dll中数组的正确值（但对于整数我得到正确的值）。
我不知道知道为什么会这样吗？
我的C＃结构如下 -
[StructLayout（LayoutKind） 。顺序）]
公共结构价值
{
[MarshalAs（UnmanagedType.I4）]
public int RunInchMm;
[MarshalAs（UnmanagedType.I4）]
public int transform_order;
[MarshalAs（UnmanagedType.I4）]
public int rotation_ang;
[MarshalAs（UnmanagedType.ByValArray）]
public int [，] rotation_org;
[MarshalAs（UnmanagedType。 I4）]
public int mirror_xchg_code;
[MarshalAs（UnmanagedType.I4）]
public int absincmode;
[MarshalAs（UnmanagedType.ByValArray）]
公共双[，] WCS;
}
我我在C＃中使用d11 as-
[DllImport（Convert.dll）]
public static extern int ConvertFunc（int prognum， ref Value WincncVal，string ProjectName，int fromrunormdi）;
//创建struct的对象
Value WincncVal = new Value（）;
WincncVal.rotation_org = new int [2,2];
WincncVal.WCS = new double [6,4];
WincncVal.RunInchMm = 5;
WincncVal.transform_order = 10;
WincncVal。 rotation_ang = 12;
WincncVal.rotation_org [0,0] = 2;
WincncVal.rotation_org [0,1] = 3;
WincncVal.mirror_xchg_code = 6;
WincncVal.absincmode = 4;
for（int i = 0 ;我< 6; i ++）
for（int j = 0; j< 4; j ++）
WincncVal.WCS [i，j] = 1.1;
ConvertFunc（9999，参考WincncVal，eWinCNC，0）;
我google了很多但没有得到正确的解决方案。
请帮帮我。
谢谢....
我尝试了什么：
我尝试使用指针但没有成功。
Hi,
I am having vc++ dll having below struct
struct Value
{
int RunInchMm;
int transform_order;
int rotation_ang;
int rotation_org[2][2];
int mirror_xchg_code;
int absincmode;
double WCS [6][4];
};
I am using this structure as parameter to my function of vc++ dll where I am reading all values from structure.
I am calling this Dll and its function from c# application & passing values to structure from C# application, but i am not getting correct values for arrays in dll (but for integer i am getting correct values) .
I don't know why it is so?
My structure from C# is as below-
[StructLayout(LayoutKind.Sequential)]
public struct Value
{
[MarshalAs(UnmanagedType.I4)]
public int RunInchMm;
[MarshalAs(UnmanagedType.I4)]
public int transform_order;
[MarshalAs(UnmanagedType.I4)]
public int rotation_ang;
[MarshalAs(UnmanagedType.ByValArray)]
public int[,] rotation_org;
[MarshalAs(UnmanagedType.I4)]
public int mirror_xchg_code;
[MarshalAs(UnmanagedType.I4)]
public int absincmode;
[MarshalAs(UnmanagedType.ByValArray)]
public double[,] WCS;
}
I am using dll in C# as-
[DllImport("Convert.dll")]
public static extern int ConvertFunc(int prognum, ref Value WincncVal, string ProjectName, int fromrunormdi);
//Create object of struct
Value WincncVal = new Value();
WincncVal.rotation_org = new int[2, 2];
WincncVal.WCS =new double[6,4];
WincncVal.RunInchMm = 5;
WincncVal.transform_order = 10;
WincncVal.rotation_ang = 12;
WincncVal.rotation_org[0, 0] = 2;
WincncVal.rotation_org[0, 1] = 3;
WincncVal.mirror_xchg_code = 6;
WincncVal.absincmode = 4;
for (int i = 0; i < 6; i++)
for (int j = 0; j < 4; j++)
WincncVal.WCS[i, j] = 1.1;
ConvertFunc(9999, ref WincncVal, "eWinCNC", 0);
I googled a lot but not getting proper solution.
Please help me.
Thanks....
What I have tried:
I tried using pointers but no success.
推荐答案
多维数组很难在托管和非托管世界之间传递。
你的
Multi-dimensional arrays are hard to pass between managed and unmanaged worlds.
Your
int rotation_org[2][2]; 实际上是三个对象：一个用于矩阵，一个用于每个列。虽然您的非托管C ++代码只能看到一个对象，但是相邻内存位置中的所有矩阵单元格都是如此，就像指定了一维数组一样。
最简单的方法传输矩阵是通过使用一维数组!!
in C# world is actually three objects: one for the matrix, and one for each of its columns. Whereas your unmanaged C++ code only sees one object, will all matrix cells in adjacent memory locations, as if a one-dimensional array was specified.
Far the easiest way to transport matrices is by using one-dimensional arrays!!
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