Byte []浮点[]到Byte []

Question

For some calculations I need to use Floats, but I have an byte[] at my disposal so I first do:

Array.Copy(byteArray, floatArray, byteArray.Length);

That works great, I the do some calulations on the floats.but now I need to convert it back to an byteArray. I can't use the following code, it crashes, without giving an specific error message.

float[] DiffernetfloatArray= new float[ byteArray];  
Array.Copy(DiffernetfloatArray, byteArray, DiffernetfloatArray.Length);

First I thought it was the size that wasn't OK, but the float array that I'm using, I increased the size by 500 just for testing, still gave me same error

Does anyone know how I could fix this? Preferably answers in C#

Answer 1

its easier with linq:

var byteArray = floatArray.Select(f => Convert.ToByte(f)).ToArray();
var floatArray = byteArray.Select(b => (float)Convert.ToDouble(b)).ToArray();

Answer 2

There's an easier way:

System.BitConverter.GetBytes(float)

MSDN

Answer 3

可以将字节转换为浮点数，因为它适合该类型，但是通过隐式转换无法完成另一种方法-浮点数可能太大而无法容纳一个字节，因此Array.Copy将永远无法工作在这种情况下。