Sometimes, when we deal with images stored in database BLOB we will come across situations where we need to convert between BitMap object to byte[] and vice versa. This code snippet will help us to achieve it.

Byte[] to Bitmap Object

Stream str = new MemoryStream((Byte[])dr[0]);     

Bitmap loBMP = new Bitmap(str);

In the above code, dr[0] is the datareader object that fetches the byte array from the database.

BitMap Object to byte[]

        MemoryStream ms = new MemoryStream();

        bmpOut.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

        byte[] bmpBytes = ms.GetBuffer();

        bmpOut.Dispose();

        ms.Close();

OR

            byte[] bmpBytes = (byte[])System.ComponentModel.TypeDescriptor.GetConverter(bmpOut).ConvertTo(bmpOut, typeof(byte[]));

In the above code, bmpOut is the BitMap Object.

Include System.IO and System.Drawing namespace for the above code to work.