Convert an IBuffer to a byte array in Windows Phone 8.1, how?

c# rendertargetbitmap windows-phone-8.1
AshleyT picture AshleyT · Apr 5, 2014 · Viewed 12.4k times · Source

I'm writing an application for Windows Phone 8.1.

I need to save an UIElement as an image file (I'd prefer JPG or PNG). I'm using RenderTargetBitmap class to do this. After calling the method RenderAsync on my UIElement I create an IBuffer that contains the result of the method GetPixelsAsync() of my RenderTargetBitmap.

Now I need to call the method ToArray() to convert my IBuffer in a byte array to save my image using something like BitmapEncoder, but it seems that on Windows Phone 8.1 there isn't any ToArray() method for IBuffer, while on Windows 8.1 is present.

How can I solve this issue?

Answer

Paul Annetts picture Paul Annetts · Apr 5, 2014

This is available on Windows Phone 8.1, but it not available on WP 8.0. (see MSDN link)

You need to make sure that you include the appropriate namespace however so it is found by the compiler:

using System.Runtime.InteropServices.WindowsRuntime

Related questions

Convert RenderTargetBitmap to BitmapImage

I have a RenderTargetBitmap, I need to convert it to BitmapImage. Please check the code below. RenderTargetBitmap bitMap = getRenderTargetBitmap(); Image image = new Image();// This is a Image image.Source = bitMap; In the above code I have used Image.Now I …

Read More
How to convert a XPS file to an image in high quality (rather than blurry low resolution)?

I'm trying to convert an XPS with WPF. The idea is that these images can be loaded with silverlight 4, for this I am using the following code: // XPS Document XpsDocument xpsDoc = new XpsDocument(xpsFileName, System.IO.FileAccess.Read); FixedDocumentSequence docSeq = …

Read More
Saving a canvas to png C# wpf

So I am trying to take a snapshot of my canvas in WPF C# so that I can save it out as a png. The image saves incorrectly at present as it is including the left and top margins. This …

Read More