.net - How to convert a byte array to double array in C#?

Question

I have a byte array which contains double values. I want to convert It to double array. Is it possible in C#?

Byte array looks like:

byte[] bytes; //I receive It from socket

double[] doubles;//I want to extract values to here

I created a byte-array in this way (C++):

double *d; //Array of doubles
byte * b = (byte *) d; //Array of bytes which i send over socket

Answer 1

You can't convert an array type; however:

byte[] bytes = ...
double[] values = new double[bytes.Length / 8];
for(int i = 0 ; i < values.Length ; i++)
    values[i] = BitConverter.ToDouble(bytes, i * 8);

or (alterntive):

byte[] bytes = ...
double[] values = new double[bytes.Length / 8];
Buffer.BlockCopy(bytes, 0, values, 0, values.Length * 8);

should do. You could also do it in unsafe code:

byte[] bytes = ...
double[] values = new double[bytes.Length / 8];
unsafe
{
    fixed(byte* tmp = bytes)
    fixed(double* dest = values)
    {
        double* source = (double*) tmp;
        for (int i = 0; i < values.Length; i++)
            dest[i] = source[i];
    }
}

not sure I recommend that, though