c# - Conversion from image to base64, System.drawing.image

Question

I use c# for windows phone 8 app and i need to convert one image to base 64. I use this code:

public string ImageToBase64(Image image, System.Drawing.Imaging.ImageFormat format)
    {
        using (MemoryStream ms = new MemoryStream())
        {
            // Convert Image to byte[]
            image.Save(ms, format);
            byte[] imageBytes = ms.ToArray();

            // Convert byte[] to Base64 String
            string base64String = Convert.ToBase64String(imageBytes);
            return base64String;
        }
    }

but it return this error: the name and the type of drwing name it isn't exist on the space of the system name, maybe there isn't an assembly reference.

I try to install a ddl, but it's not ok.

Answer 1

The code you try to use cannot work on Windows Phone, because it uses classes from the System.Drawing assembly, which is not available on this platform.

Try with this sample code:

public string GetBase64(Image image)
{
    byte[] bytearray;
    using (MemoryStream ms = new MemoryStream())
    {
        WriteableBitmap wb = new WriteableBitmap((BitmapImage)image.Source);
        wb.SaveJpeg(ms, wb.PixelWidth, wb.PixelHeight, 0, 100);
        bytearray = ms.ToArray();
    }
    return Convert.ToBase64String(bytearray);
}