C#實現整型數據字任意編碼任意進制的轉換和逆轉換

又是個閒極無聊的下午，無聊寫了這麼個東西，可以實現任意整數按照任意編碼和任意進制的轉換和逆向轉換。
 
用途：
 
惡。。這個我也不清楚，目前看來可以用來做驗證碼，用來做短網址，其他？暫時沒有想到。
 
上圖先：
 
 
 
 
 
實現如下：
 
 
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> 
        /// 數字轉換為指定的進制形式字符串 
        /// </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> 
        /// 指定字符串轉換為指定進制的數字形式 
        /// </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("輸入數字：{0}", number); 
            Console.WriteLine("規則：{0}\t\t進制：{1}進制", adapter.Characters,adapter.Length); 
            var numtostr = adapter.ToString(number); 
            Console.WriteLine("轉換結果：{0}", numtostr); 
            var strtonum = adapter.FromString(numtostr); 
            Console.WriteLine("逆向轉換結果：{0}", strtonum); 
            Console.WriteLine(); 
            Console.WriteLine("============ 無聊的分割線============"); 
            Console.WriteLine(); 
        } 
 
        static void Main(string[] args) 
        { 
            //傳統的2進制 
            Number n1 = new Number("01"); 
            //傳統的8進制 
            Number n2 = new Number("01234567"); 
            //傳統的16進制 
            Number n3 = new Number("0123456789ABCDEF"); 
            //自定義編碼的N進制，這個可以用來做驗證碼？ 
            Number n4 = new Number("爹媽說名字太長躲在樹後面會被部落發現"); 
            //山寨一個短網址 
            Number n5 = new Number("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"); 
 
            Print(65535, n1); 
            Print(65535, n2); 
            Print(65535, n3); 
            Print(65535, n4); 
            Print(165535, n5); 
             
            Console.ReadKey(); 
 
        } 
    } 
} 
 
 
 
寫完，剛好6點，收拾下班

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