using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Web;
public class Utility
{
public static string GetRandomShortenUrl(int length)
{
if (length == -1)
length = GetRandomNumber(2, 6);
string charPool = "ABCDEFGOPQRSTUVWXY1234567890ZabcdefghijklmHIJKLMNnopqrstuvwxyz";
StringBuilder rs = new StringBuilder();
Random random = new Random();
for (int i = 0; i < length; i++)
{
rs.Append(charPool[(int)(random.NextDouble() * charPool.Length)]);
}
return rs.ToString();
}
public static int GetRandomNumber(int start, int end)
{
Random rand = new Random();
return rand.Next(start, end);
}
}