How to Convert a WriteableBitmap image to Byte array in WinRt App

Question

I want to convert a WriteableBitmap image to a Byte[] array using C# code in Windows store metro style apps.

thumbmunkeys · Accepted Answer · 2015-05-13 10:54:10Z

8

WriteableBitmap exposes PixelBuffer property of type IBuffer - a Windows Runtime interface which can be converted to a byte array with .NET Streams

    byte[] ConvertBitmapToByteArray(WriteableBitmap bitmap)
    {
        using (Stream stream = bitmap.PixelBuffer.AsStream())
        using (MemoryStream memoryStream = new MemoryStream())
        {
            stream.CopyTo(memoryStream);
            return memoryStream.ToArray();
        }
    }

edited May 13, 2015 at 10:54

thumbmunkeys

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answered Apr 25, 2013 at 17:44

user2237264

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3 Comments

v.g. Over a year ago

'IBuffer' does not contain a definition for 'AsStream' and the best extension method overload 'WindowsRuntimeStreamExtensions.AsStream(IRandomAccessStream)' requires a receiver of type 'IRandomAccessStream'

SepehrM Over a year ago

@V.G. Since it's an extension method, you'll need to add using System.Runtime.InteropServices.WindowsRuntime

Robert J. Good Over a year ago

This is the only answer (after extensive searching) that works in Windows Universal projects. .Net classes and namespaces have shifted since WPF, to Win 8 metro store to Universal Windows...so this answer is gold!

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