问题是将托管C#中的二维字符串数组(非可循)传递给非托管C++。 我不确定DllImport和MarshalAs约定对于这种类型的字符串数组是否完全正确。也许,指针/内存分配定义有一个缺失的属性。非常感谢您的评论。将C#中的二维字符串数组(非blittable)传递给C++
public struct TestStruct
{
public string[,] stringArray;
}
[DllImport("C:\\Users\\Win32Project2.dll",
EntryPoint = "DDentry",
CallingConvention = CallingConvention.StdCall)]
public static extern void DDentry
(
[In][MarshalAs(UnmanagedType.LPArray,
ArraySubType = UnmanagedType.LPStr)] string[,] arrayReadDat, int iDim1, int iDim2
);
private void button6_Click_1(object sender, EventArgs e)
{
TestStruct arrayReadDat = new TestStruct();
arrayReadDat.stringArray = new string[lastRow+1, lastCol+1];
for (int i = 2; i <= lastRow; i++)
{
for (int j = 1; j <= lastCol; j++)
{
arrayReadDat.stringArray[i, j] = i;
}
}
int size = Marshal.SizeOf(typeof(TestStruct));
IntPtr strPointer = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(arrayReadDat, strPointer, false);
DDentry(arrayReadDat.stringArray, lastRow+1, lastCol+1);
Marshal.FreeHGlobal(strPointer);
}
这里的非托管C++代码,不要不表明从C#代码中的数据:
_declspec(dllexport) void DDentry(string *p2DIntArray, int iDim1, int iDim2)
{
int iIndex = 0;
for (int i = 2; i <= iDim1; i++)
{
for (int j = 1; j <= iDim2; j++)
{
arrayREAD[i][j] = p2DIntArray[iIndex++];
}
}
}
对不起,复制时出现litlle错误:应该是:string strK =“testify”; arrayReadDat.stringArray [i,j] = strK; – joe