array of ByteArray into MemoryStream

Question

I have a method which returns a array of ByteArray:

public byte[][] Draw(ImageFormat imageFormat, ImageSize imageSize);

and I need to write it into a MemoryStream:

var byteArray = instanceName.Draw(ImageFormat.Jpeg, ImageSize.Dpi150);
MemoryStream ms = new MemoryStream(byteArray[0]);

This is working so far because the array of byteArray only ever has one element. Would someone be able to point out and provide a solution on : what would happen if the array of byteArray has more than one element?

I guess with current code I would still take the first element of the byteArray and discard the rest, but I need MemoryStream and it can not take a multi-dimensional array.

Answer 1

iYou will have to loop and write, something like this:

var ms = new MemoryStream();
for(var i=0; i < byteArray.Length; i++)
  ms.Write(byteArray[i], 0, byteArray[i].Length);

(I'm not sure it's working as-is, you might have to adjust it, but it's the principle)

Answer 2

As you mentioned only the first element at [0] position would be used by memory stream. Since memory stream is sequential by design, you need a loop to flat your array of arrays and put it into memory stream. As a second look to your code, I suggest to change your Draw() method to produce linear data structure rather than two dimensional (array of array) if you don't need this type of data structure anywhere else in your code.