获取html标签属性

为了获取html代码一些标签属性，我们可以把这些html当作为一段xml的字符串来处理。可以参考下图:

 

上图相关代码：

 
   
   using System; 
   
 
   using System.Collections.Generic; 
   
 
   using System.Linq; 
   
 
   using System.Web; 
   
 
   using System.Web.UI; 
   
 
   using System.Web.UI.WebControls; 
   
 
   using System.Xml; 
   
 
   
 
   public  
   partial  
   class _Default : System.Web.UI.Page 
   
{ 
   
     
   protected  
   void Page_Load( 
   object sender, EventArgs e) 
   
    { 
   
         
   string htmlcode =  
   " 
   <img alt=\"mvp logo\" src=\"http://images.cnblogs.com/cnblogs_com/insus/MvpPhoto.jpg\" width=\"120\" height=\"30\" /> 
   "; 
   
 
   
        XmlNodeList xnl = GetNoteList(htmlcode,  
   " 
   //img 
   "); 
   
         
   for ( 
   int i =  
   0; i < xnl.Count; i++) 
   
        { 
   
            Response.Write(xnl[i].Attributes[ 
   " 
   alt 
   "].Value +  
   " 
   <br/> 
   "); 
   
            Response.Write(xnl[i].Attributes[ 
   " 
   src 
   "].Value +  
   " 
   <br/> 
   "); 
   
            Response.Write(xnl[i].Attributes[ 
   " 
   width 
   "].Value +  
   " 
   <br/> 
   "); 
   
            Response.Write(xnl[i].Attributes[ 
   " 
   height 
   "].Value +  
   " 
   <br/> 
   "); 
   
        } 
   
    } 
   
 
   
     
   private XmlNodeList GetNoteList( 
   string xmlText,  
   string tag) 
   
    { 
   
        XmlDocument xDoc =  
   new XmlDocument(); 
   
        xDoc.Load( 
   new System.IO.MemoryStream(System.Text.Encoding.GetEncoding( 
   " 
   UTF-8 
   ").GetBytes(xmlText))); 
   
         
   return xDoc.SelectNodes(tag); 
   
    } 
   
}