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;
}
}