C#之windows桌面软件第八课：汉字（GB2312）与编码（UTF-8）之间的相互转换
using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;/*（1）ASSIC码是一个字节的，一个汉字占两个字节，所以ASSIC不可以表示汉字。ASSIC码只能表示256个数。（2）咱们国家用的是GB2132国标库编码方式，而VS平台用的是UTF-8编码方式，所以先得把UTF-8编码转换为GB2132编码才可以显示出来。*/namespace 汉字显示{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}/***********utf8编码转为GB2132编码*************/private byte[] StringToBytes(string TheString) {//定义UTF8和GB2312编码对象Encoding FromEcoding = Encoding.GetEncoding("UTF-8"); //UTF8编码Encoding ToEcoding = Encoding.GetEncoding("gb2312"); //GB2312编码//把UTF-8的字符串转换为UTF-8类型的字节码byte[] FromBytes = FromEcoding.GetBytes(TheString); //FromBytes存的是汉字UTF8字节序列//把UTF-8类型的字节码转换为GB2132字节码（Tobytes存放的是GB2132字节码）byte[] Tobytes = Encoding.Convert(FromEcoding, ToEcoding, FromBytes); return Tobytes; }/***********GB2132编码转为utf8编码*************/private string BytesToString(byte[] Bytes) {string Mystring;Encoding FromEcoding = Encoding.GetEncoding("gb2312");Encoding ToEcoding = Encoding.GetEncoding("UTF-8");byte[] Tobytes = Encoding.Convert(FromEcoding, ToEcoding, Bytes);Mystring = ToEcoding.GetString(Tobytes); //得到的是UTF8字节码序列，需要转换为UTF8字符串return Mystring; }//汉字-》编码的转换按钮private void button1_Click(object sender, EventArgs e) {byte[] StringsToByte = StringToBytes(textBox1.Text);//得到字符串的GB2132字节编码。（textBox1为汉字输入框）textBox2.Text = "";foreach (byte MyByte in StringsToByte)//遍历StringsToByte数组放在MyByte变量中{string Str = MyByte.ToString("x").ToUpper();//转换为16进制大写字符串放在Str中textBox2.Text += "0x" + (Str.Length == 1 ? "0" + Str : Str) + " ";//textBox2为编码输出框}}//编码-》汉字的转换按钮private void button2_Click(object sender, EventArgs e){byte[] data = new byte[textBox3.Text.Length / 2];int i;try //如果此时用户输入字符串中含有非法字符（字母，汉字，符号等等，try，catch块可以捕捉并提示）{string buffer = textBox3.Text;//把textBox3框中输入的编码存放在buffer字符串变量中。//为了保证汉字转编码输出结果（0xXX）可以通用，所以程序允许输入0xXX（可以带空格），程序会将0x和空格自动去除buffer = buffer.Replace("0x", ""); //用空字符串代替0X buffer = buffer.Replace(" ", string.Empty);//string.Empty等同于上面的 ""for (i = 0; i < buffer.Length / 2; i++)//转换偶数个{data[i] = Convert.ToByte(buffer.Substring(i * 2, 2), 16); //转换为16进制}textBox4.Text = BytesToString(data); //把byte型数据转换为String类型数据，并输出给textBox4框 }catch{MessageBox.Show("数据转换错误，请输入数字。", "错误");}}}}
(部分代码来至杜洋工作室)
