How can I pass images between pages with transparent background, png format? Now I passed image but background is black.
Here is my code:
First page:
WriteableBitmap wb = new WriteableBitmap(logoQrCodeImage, null);
Byte[] array = ConvertImage.ConvertToBytes(wb);
if (!IsolatedStorageSettings.ApplicationSettings.Contains("State"))
{
IsolatedStorageSettings.ApplicationSettings["State"] = array;
IsolatedStorageSettings.ApplicationSettings.Save();
}
Second page:
Byte[] array = IsolatedStorageSettings.ApplicationSettings["State"] as Byte[];
MemoryStream stream = new MemoryStream(array);
WriteableBitmap wb = new WriteableBitmap(50, 50);
//wb.LoadJpeg(stream);
var encoder = new PngEncoder();
ExtendedImage myImage;
myImage = wb.ToImage();
encoder.Encode(myImage, stream);
icon.Source = myImage.ToBitmap();
IsolatedStorageSettings.ApplicationSettings.Remove("State");
IsolatedStorageSettings.ApplicationSettings.Save();
You seem to encode/decode the image as JPEG, which does not handles transparency.
Try saving it as-is (Bitmap) or PNG.
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