关于数据存储问题

Question

想将一个程序需要的参数存在外部文件中，希望外部文件里面的数据存成那种乱码形式的。主要是为了防止客户随便改数据。求思路。
因为第一次接触这方面的东西，希望可以给个提示，如何实现.
叩谢！

Answer 1

将数据加密再存入, 读取时解密. 我这有一个利用GZIP算法将数据压缩与解压的示例, 供你参考:#region Using directivesusing System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.IO.Compression;#endregionnamespace Compressor
{
   class Program
   {
      static void SaveCompressedFile(string filename, string data)          //文件名, 传入的数据
      {
         FileStream fileStream =
            new FileStream(filename, FileMode.Create, FileAccess.Write);
         GZipStream compressionStream =
            new GZipStream(fileStream, CompressionMode.Compress);           //GZIP算法， 可用DeflateStream(Deflate算法)替换GZipStream
         StreamWriter writer = new StreamWriter(compressionStream);
         writer.Write(data);                                                //写入数据
         writer.Close();
      }      static string LoadCompressedFile(string filename)                     //从指定的文件名中恢复数据
      {
         FileStream fileStream =
            new FileStream(filename, FileMode.Open, FileAccess.Read);
         GZipStream compressionStream =
            new GZipStream(fileStream, CompressionMode.Decompress);         //CompressionMode.Decompress为解压， Compress为压缩
         StreamReader reader = new StreamReader(compressionStream);
         string data = reader.ReadToEnd();
         reader.Close();
         return data;
      }      static void Main(string[] args)
      {
         try
         {
            string filename = "compressedFile.txt";            Console.WriteLine(
               "Enter a string to compress (will be repeated 1000 times):");
            string sourceString = Console.ReadLine();
            StringBuilder sourceStringMultiplier =
               new StringBuilder(sourceString.Length * 100);
            for (int i = 0; i < 100; i++)
            {
               sourceStringMultiplier.Append(sourceString);
            }
            sourceString = sourceStringMultiplier.ToString();
            Console.WriteLine("Source data is {0} bytes long.", sourceString.Length);            SaveCompressedFile(filename, sourceString);                                 //压缩数据
            Console.WriteLine("\nData saved to {0}.", filename);            FileInfo compressedFileData = new FileInfo(filename);
            Console.WriteLine("Compressed file is {0} bytes long.",
                              compressedFileData.Length);            string recoveredString = LoadCompressedFile(filename);                      //解压数据
            recoveredString = recoveredString.Substring(0, recoveredString.Length/100);
            Console.WriteLine("\nRecovered data: {0}", recoveredString);            Console.ReadKey();
         }
         catch (IOException ex)
         {
            Console.WriteLine("An IO exception has been thrown!");
            Console.WriteLine(ex.ToString());
            Console.ReadKey();
         }
      }
   }
}