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一个webste我使用这个功能获得一个网站的网页排名的谷歌网页排名。每次它返回-1即异常代码。我无法找到公关。我不知道什么错误，为什么我不能够找到PR

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Text; 
using System.Text.RegularExpressions; 
using System.Net; 
using System.IO; 


class GetPR 
{ 
    private const UInt32 myConst = 0xE6359A60; 
    private static void _Hashing(ref UInt32 a, ref UInt32 b, ref UInt32 c) 
    { 
     a -= b; a -= c; a ^= c >> 13; 
     b -= c; b -= a; b ^= a << 8; 
     c -= a; c -= b; c ^= b >> 13; 
     a -= b; a -= c; a ^= c >> 12; 
     b -= c; b -= a; b ^= a << 16; 
     c -= a; c -= b; c ^= b >> 5; 
     a -= b; a -= c; a ^= c >> 3; 
     b -= c; b -= a; b ^= a << 10; 
     c -= a; c -= b; c ^= b >> 15; 
    } 
    public static string PerfectHash(string theURL) 
    { 
     String url = string.Format("info:{0}", theURL); 

     int length = url.Length; 

     UInt32 a, b; 
     UInt32 c = myConst; 

     int k = 0; 
     int len = length; 

     a = b = 0x9E3779B9; 

     while (len >= 12) 
     { 
      a += (UInt32)(url[k + 0] + (url[k + 1] << 8) + 
       (url[k + 2] << 16) + (url[k + 3] << 24)); 
      b += (UInt32)(url[k + 4] + (url[k + 5] << 8) + 
       (url[k + 6] << 16) + (url[k + 7] << 24)); 
      c += (UInt32)(url[k + 8] + (url[k + 9] << 8) + 
       (url[k + 10] << 16) + (url[k + 11] << 24)); 
      _Hashing(ref a, ref b, ref c); 
      k += 12; 
      len -= 12; 
     } 
     c += (UInt32)length; 
     switch (len) 
     { 
      case 11: 
       c += (UInt32)(url[k + 10] << 24); 
       goto case 10; 
      case 10: 
       c += (UInt32)(url[k + 9] << 16); 
       goto case 9; 
      case 9: 
       c += (UInt32)(url[k + 8] << 8); 
       goto case 8; 
      case 8: 
       b += (UInt32)(url[k + 7] << 24); 
       goto case 7; 
      case 7: 
       b += (UInt32)(url[k + 6] << 16); 
       goto case 6; 
      case 6: 
       b += (UInt32)(url[k + 5] << 8); 
       goto case 5; 
      case 5: 
       b += (UInt32)(url[k + 4]); 
       goto case 4; 
      case 4: 
       a += (UInt32)(url[k + 3] << 24); 
       goto case 3; 
      case 3: 
       a += (UInt32)(url[k + 2] << 16); 
       goto case 2; 
      case 2: 
       a += (UInt32)(url[k + 1] << 8); 
       goto case 1; 
      case 1: 
       a += (UInt32)(url[k + 0]); 
       break; 
      default: 
       break; 
     } 

     _Hashing(ref a, ref b, ref c); 

     return string.Format("6{0}", c); 
    } 

    public int MyPR(string myURL) 
    { 
     string strDomainHash = PerfectHash(myURL); 
     string myRequestURL = string.Format("http://toolbarqueries.google.com/" + 
       "search?client=navclient-auto&ch={0}&features=Rank&q=info:{1}", 
       strDomainHash, myURL); 

     try 
     { 
      HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(myRequestURL); 
      string myResponse = new StreamReader(
        myRequest.GetResponse().GetResponseStream()).ReadToEnd(); 
      if (myResponse.Length == 0) 
       return 0; 
      else 
       return int.Parse(Regex.Match(myResponse, 
         "Rank_1:[0-9]:([0-9]+)").Groups[1].Value); 
     } 
     catch (Exception) 
     { 
      return -1; 
     } 
    } 



} 


public partial class PageRankChecker : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 

    } 
    public void checkpagerankbutton_Click(object sender, EventArgs e) 
    { 
     String geturl= url.Text; 

     GetPR a = new GetPR(); 

     int profmywebsite= a.MyPR(geturl); 
     mypr1.Text = profmywebsite.ToString(); 

    } 
} 

Answer 1

private static void _Hashing(ref UInt32 a, ref UInt32 b, ref UInt32 c) 
{ 
    a -= b; a -= c; a ^= c >> 13; 
    b -= c; b -= a; b ^= a << 8; 
    c -= a; c -= b; c ^= b >> 13; 
    a -= b; a -= c; a ^= c >> 12; 
    b -= c; b -= a; b ^= a << 16; 
    c -= a; c -= b; c ^= b >> 5; 
    a -= b; a -= c; a ^= c >> 3; 
    b -= c; b -= a; b ^= a << 10; 
    c -= a; c -= b; c ^= b >> 15; 
}