Create a WriteableBitmap from a byte array wpf

Question

from examples I have been able to create BitmapImage the byte array

public byte[] BufferFromImage(BitmapImage myImageFile) { WriteableBitmap btmMap = new WriteableBitmap(BitmapFactory.ConvertToPbgra32Format(myImageFile)); return btmMap.ToByteArray(); }

Now I’m looking to reverse that, but so far without success , I’ve checked on https://writeablebitmapex.codeplex.com which states it can Create a WriteableBitmap from a byte array but I haven’t found any examples.

public WriteableBitmap ByteArrayToImage(Byte[] BArray) { var width = 100; var height = 100; var dpiX = 96d; var dpiY = 96d; var pixelFormat = PixelFormats.Pbgra32; var bytesPerPixel = (pixelFormat.BitsPerPixel + 7) / 8; var stride = bytesPerPixel * width; var bitmap = BitmapImage.Create(width, height, dpiX, dpiY, pixelFormat, null, BArray, stride); WriteableBitmap wbtmMap = new WriteableBitmap(BitmapFactory.ConvertToPbgra32Format(bitmap)); return wbtmMap; }

This returns an error

System.ArgumentException was unhandled by user code Message=Buffer size is not sufficient.

I hoping someone can point me in the right direction cheers

On what line does the exception originate? I assume it is either BitmapImage.Create or new WriteableBitmap, but that would be a good starting point. — Mike Strobel
– Mike Strobel, Commented Oct 6, 2014 at 15:21

cKNet · Accepted Answer · 2014-10-06 23:05:58Z

3

Try to increase the buffer's size... Buffer size should be calculated like stride * height.

edited Oct 6, 2014 at 23:05

answered Oct 6, 2014 at 15:44

cKNet

6551 gold badge10 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

mgphall Over a year ago

Almost correct answer, I had the height wrong of the image, you mention the buffer size and that lead me to the correct solution

Collectives™ on Stack Overflow

Create a WriteableBitmap from a byte array wpf

1 Answer 1

1 Comment

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Related