C#生成流水号编码[a-z(不包括i和o) 按0-9　a-z的顺序)]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
public class Program
{
static void Main(string[] args)
{
CustomBaseNumber cbn = new CustomBaseNumber("0123456789abcdefghjklmnpqrstuvwxyz");
cbn.CustomBase = "1";
for (int i = 0; i < 1000000; i++)
{
Console.WriteLine(cbn.CustomBase.PadLeft(6, '0'));
cbn.DecBase++;
}
Console.ReadKey();
}
}
class CustomBaseNumber
{
private string _chars;
public CustomBaseNumber(string chars)
{
_chars = chars;
}
public string CustomBase
{
get
{
string value = "";
int decvalue = DecBase;
int n = 0;
if (decvalue == 0) return new string(new char[] { _chars[0] });
while (decvalue > 0)
{
n = decvalue % _chars.Length;
value = _chars
+ value;
decvalue = decvalue / _chars.Length;
}
return value;
}
set
{
int n = 0;
Func<char, int> getnum = (x) => { for (int i = 0; i < _chars.Length; i++) if (x == _chars[i]) return i; return 0; };
for (int i = 0; i < value.Length; i++)
{
n += Convert.ToInt32(Math.Pow((double)_chars.Length, (double)(value.Length - i - 1)) * getnum(value[i]));
}
DecBase = n;
}
}
public int DecBase
{
get;
set;
}
}
}