Save WriteableBitmap to file using WPF

Question

I have:

WriteableBitmap bmp;

I basicly want to save it into a file on the disk like the following:

C:\bmp.png

I read some forums which mentions to read:

bmp.Pixels

and save those pixels into a Bitmap then use Bitmap.SaveImage() function. However, I can't access any Pixels. Apperantly my WriteableBitmap does not have any property named Pixels.

I use .NET Framework 4.0.

Just want to mention that WriteableBitmap.Pixels is a property in Silverlight. It is not available in WPF- — Anders Gustafsson
– Anders Gustafsson, Commented Jun 26, 2012 at 20:54
@AndersGustafsson Thanks for the comment. I wasn't aware of it. Cheers. — Sait
– Sait, Commented Jun 27, 2012 at 14:20

Indy9000 · Accepted Answer · 2016-07-03 15:08:51Z

38

Use your WriteableBitmap's clone and use this function as below:

CreateThumbnail(filename, _frontBitmap.Clone());

...

void CreateThumbnail(string filename, BitmapSource image5)
{
    if (filename != string.Empty)
    {
         using (FileStream stream5 = new FileStream(filename, FileMode.Create))
         {
             PngBitmapEncoder encoder5 = new PngBitmapEncoder();
             encoder5.Frames.Add(BitmapFrame.Create(image5));
             encoder5.Save(stream5);
         }
    }
 }

edited Jul 3, 2016 at 15:08

answered Jun 26, 2012 at 17:33

Indy9000

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1 Comment

Dmitri Nesteruk Over a year ago

Is it really necessary to call stream.Close()? Won't Dispose() do that automatically?

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