如何将双精度数组从C#传递到C ++(DLL) [英] How to pass Array of doubles from C# to C++ (DLL)
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问题描述
C ++函数签名为:
the C++ function signature is:
int Eye_GetPositionSC2(std::string fname_mob, double sensors[9], int &map_x, int &map_y)
C#函数签名为:
[DllImport(@"eyeWhere.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Unicode)]
public static extern int Eye_GetPositionSC2([MarshalAs(UnmanagedType.LPWStr)]string filename, [In , MarshalAs(UnmanagedType.LPArray)]double[] sensors)
代码编译良好,但是在将double数组传递给函数时存在"AccessViolationexception".
the code is compiling good but there is an "AccessViolationexception" while passing the double array to the function.
推荐答案
您不能从C#调用该函数.它接受不能用于互操作的std::string
.您还从C#转换中省略了两个参数.
You cannot call that function from C#. It accepts a std::string
which cannot be used for interop. You also omitted two parameters from your C# translation.
C ++代码应为:
int Eye_GetPositionSC2(
const wchar_t* filename,
double sensors[9],
int &map_x,
int &map_y
)
C#代码应为:
[DllImport(@"eyeWhere.dll", CallingConvention = CallingConvention.Cdecl,
CharSet = CharSet.Unicode)]
public static extern int Eye_GetPositionSC2(
string filename,
[In, MarshalAs(UnmanagedType.LPArray, SizeConst = 9)]
double[] sensors,
ref int map_x,
ref int map_y
)
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