wIndows phone 7 解析Html数据



	 

	在我的上一篇文章中我介绍了windows phone 7的gb2312解码,

	http://www.zzzyk.com/kf/201111/112551.html

	解决了下载的Html乱码问题,这一篇,我将介绍关于windows phone 7解析html数据，以便我们获得想要的数据.

	 

	这里,我先介绍一个类库HtmlAgilityPack,（上一篇文章也是通过这个工具来解码的）. 类库的dll文件我会随demo一起提供

	 

	这里,我以新浪新闻为例来解析数据

	 

	 

	 

	先看看网页版的新浪新闻

	 

	http://news.sina.com.cn/w/sd/2011-11-27/070023531646.shtml

	 

	然后我们看一下他的源文件，

	 

	发现新闻内容的结构是

	 

	view sourceprint?<div class="blkContainerSblk"> 

	 

	                <h1 id="artibodyTitle" pid="1" tid="1" did="23531646" fid="1666">title</h1> 

	 

	                <div class="artInfo"><span id="art_source"><a href="http://www.sina.com.cn">http://www.sina.com.cn</a></span>  <span id="pub_date">pub_date</span>  <span id="media_name"><a href="">media_name</a> <a href=""></a> </span></div> 

	 

	  

	 

	                <!-- 正文内容begin --> 

	 

	                <!-- google_ad_section_start --> 

	 

	  

	 

	                <div class="blkContainerSblkCon" id="artibody"></div> 

	 

	</div>

	 

	大部分还有ID属性,这更适合我们去解析了。

	 

	接下来我们开始去解析

	 

	第一： 引用HtmlAgilityPack.dll文件

	 

	第二：用WebClient或者WebRequest类来下载HTML页面然后处理成字符串。

	 

	view sourceprint?public  delegate void CallbackEvent(object sender, DownloadEventArgs e); 

	 

	       public  event CallbackEvent DownloadCallbackEvent; 

	 

	       public void HttpWebRequestDownloadGet(string url) 

	 

	       { 

	 

	             

	 

	           Thread _thread = new Thread(delegate() 

	 

	           { 

	 

	               Uri _uri = new Uri(url, UriKind.RelativeOrAbsolute); 

	 

	               HttpWebRequest _httpWebRequest = (HttpWebRequest)WebRequest.Create(_uri); 

	 

	                _httpWebRequest.Method="Get"; 

	 

	               

	 

	               _httpWebRequest.BeginGetResponse(new AsyncCallback(delegate(IAsyncResult result) 

	 

	               { 

	 

	                   HttpWebRequest _httpWebRequestCallback = (HttpWebRequest)result.AsyncState; 

	 

	                   HttpWebResponse _httpWebResponseCallback = (HttpWebResponse)_httpWebRequestCallback.EndGetResponse(result); 

	 

	                   Stream _streamCallback = _httpWebResponseCallback.GetResponseStream(); 

	 

	 

	 

	                   StreamReader _streamReader = new StreamReader(_streamCallback,new HtmlAgilityPack.Gb2312Encoding()); 

	 

	                   string _stringCallback = _streamReader.ReadToEnd(); 

	 

	                  

	 

	                   Deployment.Current.Dispatcher.BeginInvoke(new Action(() => 

	 

	                   { 

	 

	                       if (DownloadCallbackEvent != null) 

	 

	                       { 

	 

	                           DownloadEventArgs _downloadEventArgs = new DownloadEventArgs(); 

	 

	                           _downloadEventArgs._DownloadStream = _streamCallback; 

	 

	                           _downloadEventArgs._DownloadString = _stringCallback; 

	 

	                           DownloadCallbackEvent(this, _downloadEventArgs); 

	 

	 

	 

	                       } 

	 

	                   })); 

	 

	 

	 

	               }), _httpWebRequest); 

	 

	           }) ; 

	 

	           _thread.Start(); 

	 

	       } 

	 

	      // }

	 
补充：移动开发 , Windows Phone ,