Find Page Rank of a Web page In Asp.net with C#

Page rank shows rank of your web pages, Page rank algorithm gives you idea about the page quality, more quality link to your page means Good Page rank, Page rank used as a reputation of a web page, high page ranks get very good reputation in the market of Internet.

You can use this code to create you own Page rank checking tool, its very easy to create a page rank checking tool, you can add it in your projects and websites.
Now I am showing you how you can Find Page Rank programmatically , its quite simple I am sharing some code with you, you can just call the function, URL as a Parameter.
I am sharing C Sharp Code with you , you can covert it in your programming language, may be you are used to with Java, or some other language so you can change the code as per your need.
All you have to do is just call the getpagerank(URL) and you will get a Integer value in Return with the value of Page rank.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net;
using System.IO;
using System.Text;
/// <summary>
/// Summary description for PRClass
/// </summary>
public class PRClass
{
public static int GetPageRank(string url)
{
int rank = -1;
try
{
// Form complete URL
url = String.Format(“http://toolbarqueries.google.com/tbr” +
“?client=navclient-auto&features=Rank&ch={0}&q=info:{1}”,
ComputeHash(url), UrlEncode(url));
// Download page
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
StreamReader stream = new StreamReader(request.GetResponse().GetResponseStream());
string response = stream.ReadToEnd();
// Parse page rank value
string[] arr = response.Split(‘:’);
if (arr.Length == 3)
rank = int.Parse(arr[2]);
}
catch (Exception)
{
// Do nothing but return -1;
}
return rank;
}
/// <summary>
/// URL-encodes the given URL. Handy when HttpUtility is not available
/// </summary>
/// <param name=”url”>URL to encode</param>
/// <returns></returns>
private static string UrlEncode(string url)
{
StringBuilder builder = new StringBuilder();
foreach (char c in url)
{
if ((c >= ‘a’ && c <= ‘z’) || (c >= ‘A’ && c <= ‘Z’) || (c >= ’0′ && c <= ’9′))
builder.Append(c);
else if (c == ‘ ‘)
builder.Append(‘+’);
else if (“()*-_.!”.IndexOf(c) >= 0)
builder.Append(c);
else
builder.AppendFormat(“%{0:X2}”, (byte)c);
}
return builder.ToString();
}
/// <summary>
/// Computes a hash value required by Google
/// </summary>
private static string ComputeHash(string url)
{
UInt32 a, b;
UInt32 c = 0xE6359A60;
int k = 0;
int len;
// Modify URL
url = string.Format(“info:{0}”, url);
a = b = 0x9E3779B9;
len = url.Length;
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));
Mix(ref a, ref b, ref c);
k += 12;
len -= 12;
}
c += (UInt32)url.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;
}
Mix(ref a, ref b, ref c);
return string.Format(“6{0}”, c);
}
/// <summary>
/// ComputeHash() helper method
/// </summary>
private static void Mix(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;
}
}