private byte[] GetImageBytes(Image image)
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf = new BinaryFormatter();
            bf.Serialize(ms, (object)image);
            ms.Close();
            return ms.ToArray();
        }  
        //将图片转换为二进制流的调用
        bt1 = GetImageBytes(rootComponent.BackgroundImage);
        
        
        public Image ReadImage(byte[] bytes)
        {
            MemoryStream ms = new MemoryStream(bytes, 0, bytes.Length);
            BinaryFormatter bf = new BinaryFormatter();
            object obj = bf.Deserialize(ms);
            ms.Close();
            return (Image)obj;
        }
        
        //将二进制流转换为图片
        pb.Image = ReadImage((byte[])ri.Result.Rows[i]["image"]);