asp.net C# Encoder and Decoder 网络数据编码与解码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace EncoderDecoderExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            txt_EncodeStart.Text = "这是一条测试数据：abc,123ABC..。。n test string";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //显示现有的编码类型
            foreach (EncodingInfo ei in Encoding.GetEncodings())
            {
                Encoding en = ei.GetEncoding();
                cbo_EncodeType.Items.Add(string.Format("{0}[{1}]", en.HeaderName, en.EncodingName));
            }
            cbo_EncodeType.SelectedIndex = cbo_EncodeType.FindString("gb2312");
        }

        private void btn_EncodeAndDecode_Click(object sender, EventArgs e)
        {
            //编码
            string codeType = this.cbo_EncodeType.SelectedItem.ToString();
            codeType = codeType.Substring(0, codeType.IndexOf('['));        //获得编码类型 gb2312
            Encoder encoder = Encoding.GetEncoding(codeType).GetEncoder();  //获得一个 gb2312 编码类型的编码器
            char[] chars = this.txt_EncodeStart.Text.ToCharArray();         //将字符串转换为一组char数组
            byte[] bytes = new byte[encoder.GetByteCount(chars, 0, chars.Length, true)];    //声明一个长度为‘编码为byte后产生的字节数’
            encoder.GetBytes(chars, 0, chars.Length, bytes, 0, true);       //进行编码，将chars数组中的字符编码到byte数组中
            txt_EncodeOver.Text = Convert.ToBase64String(bytes);            //将 8 位无符号整数数组的值转换为其用 Base64 数字编码的等效字符串 显示到控件中。

            //解码
            Decoder decoder = Encoding.GetEncoding(codeType).GetDecoder();      //获得编码类型为 gb2312 的解码器
            int charLen = decoder.GetChars(bytes, 0, bytes.Length, chars, 0);   //进行解码，将byte数组中的8位无符号整数转换为 char字符
            String strResult = "";
            foreach (char c in chars)
                strResult += c.ToString(); 
            txt_DecodeOver.Text = strResult;

        }

    }
}

namespace EncoderDecoderExample
{
    partial class Form1
    {
        ///

        ///

        #region Windows 窗体设计器生成的代码

        ///

        }

        #endregion

        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.ComboBox cbo_EncodeType;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox txt_EncodeStart;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.TextBox txt_EncodeOver;
        private System.Windows.Forms.TextBox txt_DecodeOver;
        private System.Windows.Forms.Button btn_EncodeAndDecode;
    }
}