如何使用asp.net從網頁中刪除數據

Question

我想從我的html頁面獲取值。 我試圖讓使用HttpWebRequest一樣，但我不能做到這麼遠請幫助？

<div class="container"> 

     <div class="one-third column"> 
<ol start="181"> 
<li><a href="/lyrics/hindi-lyrics-of-Aaye%20Din%20Bahar%20Ke.html">Aaye Din Bahar Ke</a> 
</li><li><a href="/lyrics/hindi-lyrics-of-Aayega%20Aane%20Wala.html">Aayega Aane Wala</a> 
</li><li><a href="/lyrics/hindi-lyrics-of-Aayi%20Milan%20Ki%20Raat.html">Aayi Milan Ki Raat</a> 

</li><li><a href="/lyrics/hindi-lyrics-of-Aiyyaa.html">Aiyyaa</a> 
</li><li><a href="/lyrics/hindi-lyrics-of-Ajab%20Gazabb%20Love.html">Ajab Gazabb Love</a> 

</li></ol> 
    </div> 

<div class="sixteen columns"> 

<hr> 
More Pages: 
<a href="hindi-songs-starting-A.html">1</a> : <a href="hindi-songs-starting-A-page-2.html">2</a> : 3 : <a href="hindi-songs-starting-A-page-4.html">4</a> : <a href="hindi-songs-starting-A-page-5.html">5</a> : <a href="hindi-songs-starting-A-page-6.html">6</a> : 
     <hr> 
<center> 

<h4>Hindi Lyrics By Movie Title</h4> 
<p>   
<a href="/lyrics/hindi-songs-starting-0.html">0-9</a> 
<a href="/lyrics/hindi-songs-starting-A.html">A</a> 
<a href="/lyrics/hindi-songs-starting-B.html">B</a> 

<a href="/lyrics/hindi-songs-starting-W.html">W</a> 
X 
<a href="/lyrics/hindi-songs-starting-Y.html">Y</a> 
<a href="/lyrics/hindi-songs-starting-Z.html">Z</a> 
| <a href="http://www.hindilyrics.net/songs/">Top Songs</a> 
</p> 
</center> 

    </div> 

這是我的HTML我想所有的鏈接

Answer 1

我們可以報廢我們坐的使用htmlagilitypack。你可以從這裏下載http://htmlagilitypack.codeplex.com/

string urls = "your web page"; 
     string result = string.Empty; 

     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urls); 
     request.UserAgent = @"Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5"; 

     using (var stream = request.GetResponse().GetResponseStream()) 
     using (var reader = new StreamReader(stream, Encoding.UTF8)) 
     { 
      result = reader.ReadToEnd(); 
     } 

     HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument(); 
     doc.Load(new StringReader(result)); 

     var elements = doc.DocumentNode.SelectNodes("//div[@class='one-third column']"); 
     foreach (HtmlNode item in elements) 
     { 
      var node1 = item.SelectNodes(".//li"); 
      foreach (HtmlNode li in node1) 
      { 
       var a = li.SelectSingleNode("//a").Attributes["href"].Value;//your link 
      } 

     } 

Answer 2

您可以使用System.Net.Http.HttpClient類和它的GetAsync()方法。 HttpClient類具有很好的異步下載網站功能。或者你可以使用WebRequest類 - 一個非常基本的方法。