Question

How can I convert a BITMAP in byte array format to JPEG format using .net 2.0?

Answer 1

What type of byte[] do you mean? The raw file-stream data? In which case, how about something like (using System.Drawing.dll in a client application):

    using(Image img = Image.FromFile('foo.bmp'))     {         img.Save('foo.jpg', ImageFormat.Jpeg);     } 

Or use FromStream with a new MemoryStream(arr) if you really do have a byte[]:

    byte[] raw = ...todo // File.ReadAllBytes('foo.bmp');     using(Image img = Image.FromStream(new MemoryStream(raw)))     {         img.Save('foo.jpg', ImageFormat.Jpeg);     }