UrlShortener.Settings.UserName = "qingyuan";

UrlShortener.Settings.ApiKey = "R_0daabdbac0fd2b58f097da9f5a1f7917";

<p>
@{
 string url = UrlShortener.Shorten("http://www.cnblogs.com/qingyuan/");
 string image = UrlShortener.Shorten("http://images.cnblogs.com/cnblogs_com/qingyuan/242728/r_qingyuan.jpg");
 string localhost = UrlShortener.Shorten("http://127.0.0.1/index.html");
}

<div>
 <label>显示:</label>
 <span>
 <a href="@url">@url</a>
 </span>
</div><br />
<div>
 <label>图片短链接:</label>
 <span>
 <img src="@image" />
 </span>
</div><br />
<div>
 <label>本机地址:</label>
 <span>
 <a href="@localhost">@localhost</a>
 </span>
</div><br /></p> 

static void Main(string[] args)
{
 string url = "http://www.cnblogs.com/qingyuan/asdf/asdf/11/24/UrlShortener.html";
 string[] results = ShortUrl(url);
 foreach (string item in results)
 {
 System.Console.WriteLine(item);
 }
}

public static string[] ShortUrl(string url)
{
 string[] chars = new string[] {"a" , "b" , "c" , "d" , "e" , "f" , "g" , "h" ,
 "i" , "j" , "k" , "l" , "m" , "n" , "o" , "p" , "q" , "r" , "s" , "t" ,
 "u" , "v" , "w" , "x" , "y" , "z" , "0" , "1" , "2" , "3" , "4" , "5" ,
 "6" , "7" , "8" , "9" , "A" , "B" , "C" , "D" , "E" , "F" , "G" , "H" ,
 "I" , "J" , "K" , "L" , "M" , "N" , "O" , "P" , "Q" , "R" , "S" , "T" ,
 "U" , "V" , "W" , "X" , "Y" , "Z"};
 string value = UserMd5(url);
 System.Console.WriteLine("MD5加密之后字符串: "+value+"\n字符串长度"+value.Length);
 string[] results = new string[value.Length / 8];
 for (int i = 0; i < value.Length/8; i++)
 {
 string tempResult = value.Substring(i*8,8);
 long lHexLong = 0x3FFFFFFF & long.Parse(tempResult);
 string outchar = "";
 for (int j = 0; j < 6; j++)
 {
  long index = 0x0000003D & lHexLong;
  outchar += chars[(int)index];
  lHexLong = lHexLong >> 5;
 }
 results[i] = outchar;
 }
 return results;
}

static string UserMd5(string str)
{
 string key = "qingyuan";
 string cl = str+key;
 string pwd = "";
 MD5 md5 = MD5.Create();
 byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(str));
 for (int i = 0; i < s.Length; i++)
 {
 pwd = pwd + s[i];
 }
 return pwd;

}