Is there any way to save an image object as png to keep the transparent colour

Question

I have not found a way up until now to save an image as png into the isolated storage. The only save for images i found was the SaveJpeg(), but that way i loose the transperancy of the image. Does anyone know of another method that allows you to save the BitMapImage as .png to the IsolatedStorage?

possible duplicate of [Saving Bitmap as PNG on WP7](http://stackoverflow.com/questions/7378946/saving-bitmap-as-png-on-wp7) — Pedro Lamas, Apr 10 '13 at 14:18

score 1 · Accepted Answer · edited May 23 '17 at 11:56

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ImageTools supports working with PNGs (encoding and decoding)

Plus, it has been asked a number of times... Saving Bitmap as PNG on WP7

edited May 23 '17 at 11:56

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answered Apr 10 '13 at 14:10

Igor Ralic

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thats all great but if u use the save to jpeg u loose the transparent colours and converting it back doesnt help then because the corners are black now. – r wank Apr 10 '13 at 17:26
That's kind of obvious, because JPEG doesn't allow transparancies. You need to encode it to PNG and then save the stream to Isolated Storage. Maybe I don't understand your problem, but it's fairly simple. – Igor Ralic Apr 10 '13 at 18:40
I missread the answer. Days been to long. Im going to give that a try – r wank Apr 11 '13 at 07:13

score 0 · Answer 2 · answered Apr 11 '13 at 08:00

My logic was incorrect. I was attempting to take a jpeg and then convert it to png which ended up in me loosing my transparency. I overlooked the fact that the "screenshot" feature i was using saved the stream to jpeg and then reused it. My mistake, I need to figure out how i can take a screenshot as png

Is there any way to save an image object as png to keep the transparent colour

2 Answers2