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C# string转换为几种不同编码的Byte[]的问题解读

目录
  • C# string转换为几种不同编码的Byte[]
    • 1.string–>Byte[]转换 
    • 2.Byte[]–>string转换 
  • C#分享几种常用的编码转换,base64、MD5、string
    • C# Base64编码
    • C# 文件与二进制流
    • C# MD5加密
    • C# string和byte[]
  • 总结

    C# string转换为几种不同编码的Byte[]

    1.string–>Byte[]转换 

    ①String类型转换为UTF8编码的Byte[]:

    string strvalue ="00123aabbAA$%";
    byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(strvalue);

    ②string类型转换为ASCII编码的Byte[]:

    string strvalue ="00123aabbAA$%";
    byte[] byteArray = System.Text.Encoding.ASCII.GetBytes (strvalue);

    ③string类型转换为GB1803编程客栈0编码的Byte[];

    strin开发者_JS培训g strvalue ="00123aabbAA$%":
    byte[] byteArray = System.Text.Encoding.GetEncoding("GB18030").GetBytes (strvalue);

    2.Byte[]–>string转换 

    ①UTF8编码的Byte[]转换为String类型:

    byte[] byteArray = new byte[100];
    String str = System.Text.Encoding.UTF8.GetString ( byteArray );

    ②ASCII编码的Byte[]转换为String类型:

    byte[] byteArray = new byte[100];
    String str = System.Text.Encoding.ASCII.GetString ( byteArray );

    ③GB18030编码的Byte[]转换为String类型:

    byte[] byteArray = new byte[100];
    String str = System.Text.Encoding.GetEncoding("GB18030").GetString ( byteArray );

    下面对上面的类型转换

    举例说明:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    namespace TRansfer
    {
      class Program
      {
        static void Main(string[] args)
       {
          string strvalue = "0aA$%#@!%^&*_+-=中国";
          byte[] byteArray1 = System.Text.Encoding.UTF8.GetBytes(strvalue);
          byte[] byteArray2 = System.Text.Encoding.ASCII.GetBytes(strvalue);
          byte[] byteArray3 = System.Text.Encoding.GetEncoding("GB18030").GetBytes(strvalue);
          byte[] byteArray11 = new byte[100];
          String str1 = System.Text.Encoding.UTF8.GetString(byteArray1);
          String str2 = System.Text.Encoding.ASCII.GetString(byteArray2);
          String str3 = System.Text.Encoding.GetEncoding("GB18030").GetString(byteArray3);
          string st1 = "";
          foreach (byte b in byteArray1)
          {
    php        st1 += b.ToString();
    
          }
          string st2 = "";
          foreach (byte b in byteArray2)
          {
            st2 += b.ToString();
          }
          string st3 = "";
          foreach (byte b in byteArray3)
          {
            st3 += b.ToString();
          }
    
          Console.WriteLine("{0} {1}", st1, str1);
          Console.WriteLine("{0} {1}", st2, str2);
          Console.WriteLine("{0} {1}", st3, strphp3);
        }
      }
    }

    测试结果如下,对英文字符的翻译都是一致,各种不同的编码的差别主要体现在中文上面:

    C# string转换为几种不同编码的Byte[]的问题解读

    C#分享几种常用的编码转换,base64、MD5、string

    C# Base64编码

    class Base64Helper
    {
      /// <suwww.devze.commmary>
      /// Base64加密,采用utf8编码方式加密
      /// </summary>
      /// <param name="source">待加密的明文</param>
      /// <returns>加密后的字符串</returns>
      public static string Base64Encode(string source)
      {
        return Base64Encode(Encoding.UTF8, source);
      }
    
      /// <summary>
      /// Base64加密
      /// </summary>
      /// <param name="encodeType">加密采用的编码方式</param>
      /// <param name="source">待加密的明文</param>
      /// <returns></returns>
      public static string Base64Encode(Encoding encodeType, string source)
      {
        string encode = string.Empty;
        byte[] bytes = encodeType.GetBytes(source);
        try
        {
          encode = Convert.ToBase64String(bytes);
        }
        catch
        {
          encode = source;
        }
        return encode;
      }
    
      /// <summary>
      /// Base64解密,采用utf8编码方式解密
      /// </summary>
      /// <param name="result">待解密的密文</param>
      /// <returns>解密后的字符串</returns>
      public static string Base64Decode(string result)
      {
        return Base64Decode(Encoding.UTF8, result);
      }
    
      /// <summary>
      /// Base64解密
      /// </summary>
      /// <param name="encodeType">解密采用的编码方式,注意和加密时采用的方式一致</param>
      /// <param name="result">待解密的密文</param>
      /// <returns>解密后的字符串</returns>
      public static string Base64Decode(Encoding encodeType, string result)
      {
        string decode = string.Empty;
        byte[] bytes = Convert.FromBase64String(result);
        try
        {
          decode = encodeType.GetString(bytes);
        }
        catch
        {
          decode = result;
        }
        return decode;
      }
    }

    C# 文件与二进制流

      /// <summary>
      /// 将文件转换为byte数组
      /// </summary>
      /// <param name="path">文件地址</param>
      /// <returns>转换后的byte数组</returns>
      public static bwww.devze.comyte[] File2Bytes(string path)
      {
        if (!System.IO.File.Exists(path))
        {
          return new byte[0];
        }
    
        FileInfo fi = new FileInfo(path);
        byte[] buff = new byte[fi.Length];
    
        FileStream fs = fi.OpenRead();
        fs.Read(buff, 0, Convert.ToInt32(fs.Length));
        fs.Close();
    
        return buff;
      }
    
      /// <summary>
      /// 将byte数组转换为文件并保存到指定地址
      /// </summary>
      /// <param name="buff">byte数组</param>
      /// <param name="savepath">保存地址</param>
      public static void Bytes2File(byte[] buff, string savepath)
      {
        if (System.IO.File.Exists(savepath))
        {
          System.IO.File.Delete(savepath);
        }
    
        FileStream fs = new FileStream(savepath, FileMode.CreateNew);
        BinaryWriter bw = new BinaryWriter(fs);
        bw.Write(buff, 0, buff.Length);
        bw.Close();
        fs.Close();
      }

    C# MD5加密

      public static string MD5Encrypt(string strText)
      {
        MD5 md5 = new MD5CryptoServiceProvider();
        byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(strText));
        return System.Text.Encoding.Default.GetString(result);
      }
      private static string GetMD5String(string sign)
      {
        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
        byte[] encryptedBytes = md5.ComputeHash(Encoding.ASCII.GetBytes(sign));
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < encryptedBytes.Length; i++)
        {
          sb.AppendFormat("{0:x2}", encryptedBytes[i]);
        }
        return sb.ToString();
      }

    C# string和byte[]

    string类型转成byte[]:

    byte[] byteArray = System.Text.Encoding.Default.GetBytes ( str );

    byte[]转成string:

    string str = System.Text.Encoding.Default.GetString ( byteArray );

    总结

    以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。

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