Yahoo! search interface

Create a class for searching Yahoo results. It must implement a Next Page method, and read URL, Title and Content from results.

C#

This example is incorrect. Please fix the code and remove this message.

Details: This examples is currently not working because Google TOS. It will be converted into Yahoo! later.

<lang csharp>using System; using System.Net; using System.Text; using System.Text.RegularExpressions; using System.Collections; using System.Collections.Generic; using System.Linq;

class TestSearch {

   private string query;
   private string content;
   private int page = 1;

   public GoogleSearch(string query) {
       this.query = query;
       this.content = new WebClient().DownloadString("http://www.test.com/search?q=" + query);
   }

   public TestSearch(string query, int page) {
       this.query = query;
       this.page = page;
       this.content = new WebClient().DownloadString(String.Format("http://www.test.com/search?q={0}&start={1}", query, (this.page - 1) * 10));
   }

   public int Page {
       get {
           return this.page;
       }
   }

   public int Length {
       get {
           return Int32.Parse(new Regex("Results \\d+? - \\d+? of about (.+?)").
               Match(this.content).Groups[1].Value.Replace(",", ""));
       }
   }

   public GoogleResult[] Results {
       get {
           ArrayList results = new ArrayList();

foreach (Match e in new Regex("

<a href=\"(.+?)\".+?>(.+?)</a>

(.+?)").Matches(this.content)) {

               string rurl = e.Groups[1].Value;

               string rtitle = e.Groups[2].Value.
                   Replace("", "").Replace("", "").Replace(" ...","");
               string rcontent = e.Groups[3].Value.
                   Replace("", "").Replace("", "").Replace(" ...", "");

               Console.WriteLine(rurl);
               results.Add(new TestResult(rurl, rtitle, rcontent));
           }
           return (TestResult[])results.ToArray(typeof(TestResult));
       }
   }

   public GoogleSearch NextPage() {
       return new TestSearch(this.query, this.page + 1);
   }

   public GoogleSearch GetPage(int page) {
       return new TestSearch(this.query, page);
   }

}

class TestResult {

   public string URL { get; set; }
   public string Title { get; set; }
   public string Content { get; set; }

   public TestResult(string url, string title, string content) {
       this.URL = url;
       this.Title = title;
       this.Content = content;
   }

}</lang>

Usage:

<lang csharp>class Program {

   static void Main() {
       TestSearch search = new TestSearch("rosetta code");

       foreach (TestResult result in search.Results) {
           Console.WriteLine(result.Title);
       }
   }

}</lang>