How to Convert system.windows.controls.image to byte[]

Question

I need to convert System.Windows.Controls.Image to byte[].

How to do it ?

Are you sure you are trying to convert a 'system.windows.controls.image' and not simply the 'System.Drawing.Image' that it displays instead? — Brian Scott, Mar 24 '11 at 12:18
@Brian It's WPF, so the class that contains the actual image is `System.Windows.Media.ImageSource` and not `System.Drawing.Image` — CodesInChaos, Mar 24 '11 at 12:24

score 1 · Accepted Answer · answered Mar 24 '11 at 12:20

1

Assuming that you answer my query above that you are actually trying to convert an image into a byte array rather than an image control into a byte array here is the code to do so;

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
 MemoryStream ms = new MemoryStream();
 imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
 return  ms.ToArray();
}

answered Mar 24 '11 at 12:20

Brian Scott

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1) You have a WinForms solution, not a WPF solution 2) Gif is no general purpose image format since it only supports 8bit images. I'd use png instead. – CodesInChaos Mar 24 '11 at 12:25
Wouldn't that return a byte[] with a GIF in it? It feels unlikely that that is what he wants. – Jonas Elfström Mar 24 '11 at 12:26
@codeinchaos - Where does the question mention anything about WPF? – Ash Burlaczenko Mar 24 '11 at 12:27
It says `system.windows.controls.image`. And that's a WPF class. – CodesInChaos Mar 24 '11 at 12:28

score 1 · Answer 2 · edited May 23 '17 at 12:32

1

In general, to convert an object to a byte array, you may want to use binary serialization. This will generate a memory stream from which you can extract a byte array.
You may start with this Question and Answer

edited May 23 '17 at 12:32

Community

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answered Mar 24 '11 at 12:24

Marcel

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IMO there are few uses where `BinaryFormatter` is the right choice. – CodesInChaos Mar 24 '11 at 12:27

score 1 · Answer 3 · answered Jun 02 '20 at 16:10

System.Windows.Controls.Image img = new System.Windows.Controls.Image();
var uri = new Uri("pack://application:,,,/Images/myImage.jpg");
img.Source = new BitmapImage(uri);
byte[] arr;
using (MemoryStream ms = new MemoryStream())
{
      var bmp = img.Source as BitmapImage;
      JpegBitmapEncoder encoder = new JpegBitmapEncoder();
      encoder.Frames.Add(BitmapFrame.Create(bmp));
      encoder.Save(ms);
      arr = ms.ToArray();
}

How to Convert system.windows.controls.image to byte[]

3 Answers3