C#实现整型数据字任意编码任意进制的转换和逆转换简介



又是个闲极无聊的下午，无聊写了这么个东西，可以实现任意整数按照任意编码和任意进制的转换和逆向转换。
用途：
恶。。这个我也不清楚，目前看来可以用来做验证码，用来做短网址，其他？暂时没有想到。
上图先：



实现如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{

public class Number
{
public string Characters
{
get;
set;
}

public int Length
{
get
{
if (Characters != null)
return Characters.Length;
else
return 0;
}

}

public Number()
{
Characters = "0123456789";
}

public Number(string characters)
{
Characters = characters;
}

/// <summary>
/// 数字转换为指定的进制形式字符串
/// </summary>
/// <param name="number"></param>
/// <returns></returns>
public string ToString(long number)
{
List<string> result = new List<string>();
long t = number;

while (t > 0)
{
var mod = t % Length;
t = Math.Abs(t / Length);
var character = Characters[Convert.ToInt32(mod)].ToString();
result.Insert(0, character);
}

return string.Join("", result.ToArray());
}

/// <summary>
/// 指定字符串转换为指定进制的数字形式
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public long FromString(string str)
{
long result = 0;
int j = 0;
foreach (var ch in new string(str.ToCharArray().Reverse().ToArray()))
{
if (Characters.Contains(ch))
{
result += Characters.IndexOf(ch) * ((long)Math.Pow(Length, j));
j++;
}
}
return result;
}

}

class Program
{
static void Print(long number, Number adapter)
{
Console.WriteLine("输入数字：{0}", number);
Console.WriteLine("规则：{0}\t\t进制：{1}进制", adapter.Characters,adapter.Length);
var numtostr = adapter.ToString(number);
Console.WriteLine("转换结果：{0}", numtostr);
var strtonum = adapter.FromString(numtostr);
Console.WriteLine("逆向转换结果：{0}", strtonum);
Console.WriteLine();
Console.WriteLine("============ 无聊的分割线 ============");
Console.WriteLine();
}

static void Main(string[] args)
{
//传统的2进制
Number n1 = new Number("01");
//传统的8进制
Number n2 = new Number("01234567");
//传统的16进制
Number n3 = new Number("0123456789ABCDEF");
//自定义编码的N进制，这个可以用来做验证码？
Number n4 = new Number("爹妈说名字太长躲在树后面会被部落发现");
//山寨一个短网址
Number n5 = new Number("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");

Print(65535, n1);
Print(65535, n2);
Print(65535, n3);
Print(65535, n4);
Print(165535, n5);

Console.ReadKey();

}
}
}