将UInt8 C ++值转换为C＃字节数组

Question

I have a 1-dimensional C++ array containing UInt8 values - I would like to convert those values and place them into a 2D C# byte array. Currently, my code is giving me incorrect values. Here is my code:

IntPtr ptr = GetDataFromCPPSide();    

byte[,] data = new byte[dimension1, dimension2];
for(int i = 0; i < dimension1; i ++)
{
    for(int j = 0; j < dimension2; j++)
    {
        data[i, j] = Marshal.ReadByte((IntPtr)(ptr.ToInt64() + j + i * dimension2) * 1));
    }
}

Right now this only converts some values correctly. I'm sure it has something to do with the way I'm converting the value in the for loop. I've placed a check on the C++ side and the values are being returned properly. Any ideas?

Answer 1

Using:

pingdata[i, j] = (byte)Marshal.ReadByte((IntPtr)(ptr.ToInt64() + (i * d2 + j)));

fixed the issue.