How to convert image to byte array?

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I working for windows phone app, How to convert image to byte array? as i have to save in SqlLite datatabse. I tried below code, but gives error at '

WriteableBitmap

' - Invalid pointer.

public byte[] ImageToArray()
        {
            BitmapImage image = new BitmapImage();
            image.CreateOptions = BitmapCreateOptions.None;            
            image.UriSource = new Uri(image1.Source.ToString(), UriKind.Relative);
            WriteableBitmap wbmp = new WriteableBitmap(image);
            MemoryStream ms = new MemoryStream();
            wbmp.SaveJpeg(ms, wbmp.PixelWidth, wbmp.PixelHeight, 0, 100);
            return ms.ToArray();
        }

Posted 7-Feb-14 7:40am

jawad59

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Sergey Alexandrovich Kryukov 7-Feb-14 13:48pm

In what line?
What are you doing? Rewriting from image1 to image and storing it in memory? Why? Why not simply store image1 to memory?
—SA

3 solutions

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Dave Kreskowiak · Answer 1 · 2014-02-07T10:02:00

I haven't tested it, but this should do the trick:

C#

public Byte[] BufferFromImage(this BitmapImage imageSource)
{
    Stream stream = imageSource.StreamSource;
    Byte[] buffer = null;
    if (stream != null && stream.Length > 0)
    {
        using (BinaryReader br = new BinaryReader(stream))
        {
            buffer = br.ReadBytes((Int32)stream.Length);
        }
    }

    return buffer;
}

This is an extention method. You would put this in it's own class and use it like this:

BitmapImage myImage = new BitmapImage();

...

byte[] imageBytes = myImage.ToByteArray();

EduChapow · Answer 2 · 2014-02-07T08:57:00

Solution 1

convert to base64

C#

 using (FileStream stream = new FileStream(indexFile.Path, FileMode.Open, FileAccess.Read))
{
    byte[] objByte = new byte[stream.length];
    string base64 =  base64 = Convert.ToBase64String(objByte);
}

Posted 7-Feb-14 8:57am

EduChapow

Comments

Dave Kreskowiak 7-Feb-14 15:42pm

Wrong...wrong...wrong.

Sergey Alexandrovich Kryukov 20-Feb-14 18:32pm

Amazing gibberish. How could you post it as "answer"?
—SA

Silent Guardian · Answer 3 · 2014-02-08T01:56:00

Solution 3

File.ReadAllBytes( string path)

Posted 8-Feb-14 1:56am

Silent Guardian