文件-- 字节相互转换(word、图片、pdf...)

方式一：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

/// <summary>       /// word文件转换二进制数据(用于保存数据库)       /// </summary>       /// <param name="wordPath">word文件路径</param>       /// <returns>二进制</returns>       public byte[] WordConvertByte(string wordPath)       {           if (!File.Exists(wordPath))           {               return null;           }           byte[] bytContent = null;           System.IO.FileStream fs = null;           System.IO.BinaryReader br = null;           try           {               fs = new FileStream(wordPath, System.IO.FileMode.Open);               br = new BinaryReader((Stream)fs);               bytContent = br.ReadBytes((Int32)fs.Length);               fs.Close();               br.Close();           }           catch           {               fs.Close();               br.Close();               return null;           }           return bytContent;       }         /// <summary>       ///二进制数据转换为word文件       /// </summary>       /// <param name="data">二进制数据</param>       /// <param name="fileName">word文件名</param>       /// <returns>word保存的相对路径</returns>       public string ByteConvertWord(byte[] data, string fileName)       {           if (data == null) return string.Empty;             FileStream fs = null;           BinaryWriter br = null;           try           {               fs = new FileStream(fileName, FileMode.OpenOrCreate);               br = new BinaryWriter(fs);               br.Write(data, 0, data.Length);               br.Close();               fs.Close();           }           catch           {               br.Close();               fs.Close();               return string.Empty;           }           return fileName;       }

方式二：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

// <summary>      /// 根据图片路径返回图片的字节流byte[]      /// </summary>      /// <param name="imagePath">图片路径</param>      /// <returns>返回的字节流</returns>      private byte[] ImageToByte(string imagePath)      {          FileStream files = new FileStream(imagePath, FileMode.Open);          byte[] imgByte = new byte[files.Length];          files.Read(imgByte, 0, imgByte.Length);          files.Close();          return imgByte;      }        /// <summary>      /// 字节数组生成图片      /// </summary>      /// <param name="Bytes">字节数组</param>      /// <returns>图片</returns>      private Image ByteArrayToImage(byte[] Bytes)      {          MemoryStream ms = new MemoryStream(Bytes);          return Bitmap.FromStream(ms, true);      }

　　程序运行效果：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

//将image转换成byte[]数据 private byte[] ImageToByte(System.Drawing.Image img) {     MemoryStream ms = new MemoryStream();     img.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg);     return  ms.ToArray(); }   //将byte[]数据转换成image private Image ByteToImage(byte[]  bytes) {      MemoryStream ms = new MemoryStream(bytes);      Image img= Image.FromStream(ms);      return img; }