Converting a JPEG image to a byte array - COM exception

Question

Using C#, I'm trying to load a JPEG file from disk and convert it to a byte array. So far, I have this code:

static void Main(string[] args) {     System.Windows.Media.Imaging.BitmapFrame bitmapFrame;      using (var fs = new System.IO.FileStream(@"C:\Lenna.jpg", FileMode.Open))     {         bitmapFrame = BitmapFrame.Create(fs);     }      System.Windows.Media.Imaging.BitmapEncoder encoder =          new System.Windows.Media.Imaging.JpegBitmapEncoder();     encoder.Frames.Add(bitmapFrame);      byte[] myBytes;     using (var memoryStream = new System.IO.MemoryStream())     {         encoder.Save(memoryStream); // Line ARGH          // mission accomplished if myBytes is populated         myBytes = memoryStream.ToArray();      } } 

However, executing line ARGH gives me the message:

COMException was unhandled. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE))

I don't think there is anything special about the file Lenna.jpg - I downloaded it from http://computervision.wikia.com/wiki/File:Lenna.jpg. Can you tell what is wrong with the above code?

Answer 1

Check the examples from this article: http://www.codeproject.com/KB/recipes/ImageConverter.aspx

Also it's better to use classes from System.Drawing

Image img = Image.FromFile(@"C:\Lenna.jpg"); byte[] arr; using (MemoryStream ms = new MemoryStream()) {     img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);     arr =  ms.ToArray(); } 

Answer 2

Other suggestion:

byte[] image = System.IO.File.ReadAllBytes ( Server.MapPath ( "noimage.png" ) ); 

Should be working not only with images.