C#处理文件流的转换

//----引入必要的命名空间
using System.IO;
using System.Drawing.Imaging;

//----代码部分----//

        private byte[] photo;//公用缓冲区
        public string SourFilePath;//源图片文件路径
        public string ObjFilePath;//目标图片路径

        public int FileToStream()//文件到流的转换
        {
            Image img = new Bitmap(SourFilePath);
            MemoryStream stream = new MemoryStream();
            img.Save(stream, ImageFormat.Bmp);
            BinaryReader br = new BinaryReader(stream);
            photo = stream.ToArray();
            stream.Close();
            return ;
        }

        public Image ShowPic()//根据流显图
        {
            byte[] bytes = photo;
            MemoryStream ms = new MemoryStream(bytes);
            ms.Position = ;
            Image img = Image.FromStream(ms);
            ms.Close();
            return img;
        }

        public int StreamToFile()//反向转换
        {
            byte[] bytes = photo;
            FileStream fs = new FileStream(ObjFilePath, FileMode.Create, FileAccess.Write);
            fs.Write(bytes, , bytes.Length);
            fs.Flush();
            fs.Close();
            return ;
        }