DataTable保存与读取 stream

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private void SaveToFile(byte[] value,string filePath) {     System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.OpenOrCreate);     fs.Write(value, 0, value.Length);     fs.Flush();     fs.Close(); }   private byte[] ConvertStreamToByteBuffer(string filePath) {     System.IO.Stream theStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);     int b1;     System.IO.MemoryStream tempStream = new System.IO.MemoryStream();     while ((b1 = theStream.ReadByte()) != -1)     {          tempStream.WriteByte(((byte)b1));      }     return tempStream.ToArray(); }         public static byte[] GetsetBinary(DataTable dt) {               byte[] bArrayResult = null; //用于存放序列化后的数据     dt.RemotingFormat = SerializationFormat.Binary; //指定DataSet串行化格式是二进制     MemoryStream ms = new MemoryStream();//定义内存流对象，用来存放DataSet序列化后的值     IFormatter IF = new BinaryFormatter();//产生二进制序列化格式     IF.Serialize(ms, dt);//串行化到内存中     bArrayResult = ms.ToArray(); // 将DataSet转化成byte[]     ms.Close();     ms.Dispose();     return bArrayResult;       }       public DataTable RetrieveDataSet(byte[] binaryData) {               MemoryStream ms = new MemoryStream(binaryData);//创建内存流     IFormatter bf = new BinaryFormatter();//产生二进制序列化格式     object obj = bf.Deserialize(ms);//反串行化到内存中     //类型检验     ms.Close();     if (obj is DataTable)     {                  DataTable dataSetResult = (DataTable)obj;          return dataSetResult;     }     else     {           return null;      } }        public static byte[] GetBytesByImage(System.Drawing.Image image) {      byte[] photo_byte = null;      using (MemoryStream ms = new MemoryStream())         {             Bitmap bmp = new Bitmap(image);             bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);             photo_byte = new byte[ms.Length];             ms.Position = 0;             ms.Read(photo_byte, 0, Convert.ToInt32(ms.Length));             bmp.Dispose();         }       return photo_byte; }              //调用方法：     DataTable dt = DbHelperSQL.Query(sql); DataTable newDt = dt.Clone(); newDt.Columns.Add("photo", System.Type.GetType("System.Byte[]"));  foreach (DataRow dr in dt.Rows)  {        newDt.ImportRow(dr);        System.Drawing.Image img = System.Drawing.Image.FromFile(StudentPhotoPath(dr["PhotoUrl"].ToString()));        img = FixedSize(img, 135, 180);        newDt.Rows[newDt.Rows.Count - 1]["photo"] = GetBytesByImage(img);        img.Dispose(); }byte[] tableByteArray = GetsetBinary(newDt); SaveToFile(tableByteArray, @"D:\hello.yzd"); byte[] byteArray = ConvertStreamToByteBuffer(@"D:\hello.yzd"); DataTable dt = RetrieveDataSet(byteArray);

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