Convert a System.Drawing.Image to a stream

Question

Possible Duplicate:
System.Drawing.Image to stream C#

how can I convert a System.Drawing.Image to a stream?

can you show your code and what you have tried so far? – Davide Piras Jun 27 '11 at 18:16 — Davide Piras, Jun 27 '11 at 18:16
With ItextSharp -> Image.GetInstance(myStream) – Christophe Debove Jun 27 '11 at 18:18 — Christophe Debove, Jun 27 '11 at 18:18

score 39 · Accepted Answer · answered Jun 27 '11 at 18:18

You can "Save" the image into a stream.

If you need a stream that can be read elsewhere, just create a MemoryStream:

var ms = new MemoryStream();
image.Save(ms, ImageFormat.Png);

// If you're going to read from the stream, you may need to reset the position to the start
ms.Position = 0;

score 5 · Answer 2 · answered Jun 27 '11 at 18:23

Add a reference to System.Drawing and include the following namespaces:

using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

And something like this should work:

public Stream GetStream(Image img, ImageFormat format)
{
    var ms = new MemoryStream();
    img.Save(ms, format);
    return ms;
}

score 3 · Answer 3 · answered Jun 27 '11 at 18:20

3

MemoryStream memStream = new MemoryStream();
Image.Save(memStream, ImageFormat.Jpeg);

That's how I've done it when I needed to transmit an image in a stream from a web server. (Note you can of course change the format).

answered Jun 27 '11 at 18:20

The Evil Greebo

7,013
3
28
55

Convert a System.Drawing.Image to a stream

3 Answers3