十进制正整数转换成六十二进制

C# code

    
      

     
       
     
       ///
     
        
     
       <summary>
     
       
     
       ///
     
        十进制正整数转换成六十二进制
     
       ///
     
        
     
       </summary>
     
       
     
       ///
     
        
     
       <param name="Number">
     
       需要转换的数字Int64格式，不能为负数
     
       </param>
     
       
     
       ///
     
        
     
       <param name="toBase">
     
       转换基数，必须是2至62以内
     
       </param>
     
       
     
       ///
     
        
     
       <returns>
     
       自定义的进制字符串
     
       </returns>
     
       
     
       public
     
        
     
       static
     
        String toDectoStr62(Int64 Number, Int32 toBase){ String str62 
     
       =
     
        
     
       ""
     
       , Digits62 
     
       =
     
        
     
       "
     
       0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
     
       "
     
       ; Int64 result 
     
       =
     
        Number; 
     
       if
     
        (Number 
     
       >
     
        
     
       0
     
       ) { 
     
       while
     
        (result 
     
       >
     
        
     
       0
     
       ) { Int32 val 
     
       =
     
        toInt32(result 
     
       %
     
        toBase); str62 
     
       =
     
        String.Format(
     
       "
     
       {0}{1}
     
       "
     
       , Digits62[val], str62); result 
     
       =
     
        (Int64)(result 
     
       /
     
        toBase); } 
     
       return
     
        str62; } 
     
       return
     
        
     
       "
     
       0
     
       "
     
       ;}
     
       ///
     
        
     
       <summary>
     
       
     
       ///
     
        六十二进制转换成十进制正整数
     
       ///
     
        
     
       </summary>
     
       
     
       ///
     
        
     
       <param name="str62">
     
       自定义的进制字符串
     
       </param>
     
       
     
       ///
     
        
     
       <param name="toBase">
     
       转换基数，必须是2至62以内
     
       </param>
     
       
     
       ///
     
        
     
       <returns>
     
       返回Int64
     
       </returns>
     
       
     
       public
     
        
     
       static
     
        Int64 toDectoStr62(String str62, Int32 toBase){ String Digits62 
     
       =
     
        
     
       "
     
       0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
     
       "
     
       ; 
     
       int
     
        length 
     
       =
     
        str62.Length; Int64 result 
     
       =
     
        
     
       0
     
       ; 
     
       for
     
        (
     
       int
     
        i 
     
       =
     
        
     
       0
     
       ; i 
     
       <
     
        length; i
     
       ++
     
       ) { Int64 val 
     
       =
     
        (Int64)Math.Pow(toBase, (length 
     
       -
     
        i 
     
       -
     
        
     
       1
     
       )); Int64 tmp 
     
       =
     
        Digits62.IndexOf(str62[i]); result 
     
       +=
     
        tmp 
     
       *
     
        val; } 
     
       return
     
        result;}