byte[]转换为BitmapImage：

byte[]转换为BitmapImage：public static BitmapImage ByteArrayToBitmapImage(byte[] byteArray) { BitmapImage bmp = null; try   {       bmp = new BitmapImage();       bmp.BeginInit();       bmp.StreamSource = new MemoryStream(byteArray);       bmp.EndInit();   }   catch   {       bmp = null;   }   return bmp;   } BitmapImage转换为byte[]：public static byte[] BitmapImageToByteArray(BitmapImage bmp) { byte[] byteArray = null; try   {       Stream sMarket = bmp.StreamSource;       if (sMarket != null && sMarket.Length > 0)       {           //很重要，因为Position经常位于Stream的末尾，导致下面读取到的长度为0。           sMarket.Position = 0;           using (BinaryReader br = new BinaryReader(sMarket))           {               byteArray = br.ReadBytes((int)sMarket.Length);           }       }   }   catch   {       //other exception handling   }   return byteArray;   }