docドキュメントのBase 64符号化および復号化

6493 ワード

1   string filepath = String.Format("{0}\\{1}\\"+docTitle, mapPath, fileName);// 
2   string newFilePath = String.Format("{0}\\{1}\\NewFile.doc", mapPath, fileName);// 
3   if (File.Exists(filepath))
4    {
5         String srcBt = EncodeFileToString(filepath);// 
6         DecodeBaseCodeToFile(srcBt, newFilePath);// 
    }

///


        ///   Base64  
        /// 
        ///  , 
        /// 
        public String EncodeFileToString(String srcFile)
        {
            Byte[] srcBt;
            FileStream srcFS = new FileStream(srcFile, FileMode.Open);
            srcBt = new byte[srcFS.Length];
            srcFS.Read(srcBt, 0, srcBt.Length);
            srcFS.Close();
            String destStr = EncodeToByte(srcBt);
            return destStr;
        }
        public String EncodeToByte(Byte[] bt)
        {
            return System.Convert.ToBase64String(bt);
        }

///


        ///  Base64  
        /// 
        ///  , 
        ///  ,  ,  ,  
        /// 
        public void DecodeBaseCodeToFile(String srcBase64Code, String desFile)
        {
            // 
            Byte[] myBt = DecodeToByte(srcBase64Code);

            if (File.Exists(desFile))
            {
                File.Delete(desFile);
            }
            // 
            using (FileStream fs = new FileStream(desFile, FileMode.CreateNew))
            {
                fs.Write(myBt, 0, myBt.Length);
            }
        }
        public Byte[] DecodeToByte(String content)
        {
            Byte[] bt = System.Convert.FromBase64String(content);
            return bt;
        }

///


        ///  
        /// 
        ///  , 
        /// 
        public Byte[] EncodeFileToString1(String srcFile)
        {
            FileStream srcFS = new FileStream(srcFile, FileMode.Open, FileAccess.Read);
            Stream sm = srcFS;
            byte[] bytes = new byte[sm.Length];
            sm.Read(bytes, 0, Convert.ToInt32(sm.Length));
            sm.Flush();
            sm.Close();
            return bytes;
        }

転載先:https://www.cnblogs.com/jinaczg/p/3829254.html

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