XAF 如何将数据库中Byte array图片显示出来

问题比较简单，直接上代码.
 
    private Image _Cover;
        [Size(SizeAttribute.Unlimited), ValueConverter(typeof(ImageValueConverter))]
        public Image Cover
        {
            get
            {
                if (_Cover == null && _Photo != null && _Photo.Length > 0)
                {
                    using (MemoryStream stream = new System.IO.MemoryStream(_Photo))
                    {
                        System.Drawing.Image image = System.Drawing.Image.FromStream(stream);
                        _Cover = image;
                        return _Cover;
                    }
                }
                return _Cover;
            }
            set
            {
 
                SetPropertyValue("Cover", ref _Cover, value);
 
            }
        }
 
        private Byte[] _Photo;
        //[Delayed]
        public Byte[] Photo
        {
            get
            {
                return _Photo;
            }
            set
            {
                //byte[] imagedata = null;
                //if (Cover != null)
                //{
                //    MemoryStream ms = new MemoryStream();
                //    Image im = new Bitmap(Cover);
                //    im.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                //    imagedata = ms.GetBuffer();
                //    _Photo = imagedata;
                //}
                SetPropertyValue("Photo", ref _Photo, value);
            }
        }

XAF自带，varbinary(Max)类型图片操作方法：

   Image fPhoto;
        [ValueConverter(typeof(ImageValueConverter)), Delayed]
        public Image Photo
        {
            get { return fPhoto; }
            set { SetPropertyValue("Photo", ref fPhoto, value); }
        }