1             try 2             { 3                 OpenFileDialog open = new OpenFileDialog();//创建OpenFileDialog实例 4                 open.Filter = "Excel文件|*.xls"; 5                 open.Multiselect = false;                  //每次只能选择一个文件 6                 if (open.ShowDialog() == DialogResult.OK) 7                 { 8                     System.IO.FileInfo fi = new System.IO.FileInfo(open.FileName); 9                     System.IO.FileStream fs = fi.OpenRead();10                     byte[] bytes = new byte[fs.Length];                   11 12                     fs.Read(bytes, 0, Convert.ToInt32(fs.Length));13                     fs.Close();14 　　　　　　　　　　　 //压 缩  Byte15                     bytes = Compress(bytes);

16 　　　　　　　　　　　 //也可以将Byte[]转化为String  这个看个人需求 转String后 容量会变大，不推荐

17                     string str = RetrieveObject(bytes);18 　　　　　　　　　　　 //将数据存入数据库 

19                     //DataHelper.DataInstance.WatConfig.InsertFile("F8", str);

                       存入数据库方法： public int InsertFile(string fabCode, byte[] bytes){............}20                 }21 22             }23             catch (SystemException ex)24             { 25                 ExceptionBase.ExceptionHandler(ex);26             }

1                 DataTable dt = DataHelper.DataInstance.WatConfig.QueryFile();

　　　　　　　　　　 //byte[] by = GetBinaryFormat(str); //用String时 可以转Byte【】

                  byte[] by = (byte[])dt.Rows[0][1];3                 byte[] bytes = Decompress(by); 5                 FileStream stream = new FileStream(@"C:\Users\......\Desktop\6.xls", FileMode.CreateNew);6                 BinaryWriter bw = new BinaryWriter(stream);7                 bw.Write(bytes, 0, bytes.Length);8                 bw.Close();9                 fs.Close();

 1         /// <summary> 2         /// 压缩数据 3         /// </summary> 4         /// <param name="data"></param> 5         /// <returns></returns> 6         public static byte[] Compress(byte[] data) 7         { 8             byte[] bytes; 9             MemoryStream ms = new MemoryStream();10             GZipStream stream = new GZipStream(ms, CompressionMode.Compress, true);11             stream.Write(data, 0, data.Length);12             stream.Close();13             stream.Dispose();14             //必须把stream流关闭才能返回ms流数据,不然数据会不完整15             bytes = ms.ToArray();16             ms.Close();17             ms.Dispose();18             return bytes;19         }20 21         /// <summary>22         /// 解压数据23         /// </summary>24         /// <param name="data"></param>25         /// <returns></returns>26         public static byte[] Decompress(byte[] data)27         {28             byte[] bytes;29             MemoryStream ms = new MemoryStream();30             ms.Write(data, 0, data.Length);31             ms.Position = 0;32             GZipStream stream = new GZipStream(ms, CompressionMode.Decompress, true);33             byte[] buffer = new byte[1024];34             MemoryStream temp = new MemoryStream();35             int read = stream.Read(buffer, 0, buffer.Length);36             while (read > 0)37             {38                 temp.Write(buffer, 0, read);39                 read = stream.Read(buffer, 0, buffer.Length);40             }41             //必须把stream流关闭才能返回ms流数据,不然数据会不完整42             stream.Close();43             stream.Dispose();44             ms.Close();45             ms.Dispose();46             bytes = temp.ToArray();47             temp.Close();48             temp.Dispose();49             return bytes;50         }51 52         /// <summary>53         /// 将objec格式化成字节数组byte[]，并压缩54         /// </summary>55         /// <param name="dsOriginal">object对象</param>56         /// <returns>字节数组</returns>57         public static byte[] GetBinaryFormat(string dsOriginal)58         {

　　　　　　　      IFormatter formatter = new BinaryFormatter();
                  byte[] byt = Convert.FromBase64String(dsOriginal);
                  object obj = null;
                  using (Stream stream = new MemoryStream(byt, 0, byt.Length))
                  {
                        obj = formatter.Deserialize(stream);
                  }
                  byte[] by = (byte[])obj;

return by;

67         }68 69         /// <summary>70         /// 将字节数组解压后反序列化成object对象71         /// </summary>72         /// <param name="binaryData">字节数组</param>73 　　     /// <returns>object对象</returns>74         public static string RetrieveObject(byte[] binaryData)75         {76             IFormatter formatter = new BinaryFormatter();77             string result = string.Empty;78             using (MemoryStream stream = new MemoryStream())79             {80                 formatter.Serialize(stream, binaryData);81                 byte[] byt = new byte[stream.Length];82                 byt = stream.ToArray();83                 result = Convert.ToBase64String(byt);84                 stream.Flush();85             }86             return result;87         }