ASP.NET的SEO：Linq to XML---网站地图和RSS Feed

<% @ WebHandler Language = " C# "  Class = " website "   %>

using  System;
using  System.Web;
using  System.Xml;
using  System.Xml.Linq;
using  System.Linq;

public   class  website : IHttpHandler {
    
     public   void  ProcessRequest (HttpContext context) {

        context.Response.ContentType  =   " text/xml " ;

         // 文件的声明信息，第第三个参数standalone的值yes 表示这个 XML 文档是自包含的(self-contained)而不依赖于外部所定义的一个 DTD. 
        XDeclaration declaration  =   new  XDeclaration( " 1.0 " ,  " UTF-8 " ,  " yes " );
        context.Response.Write(declaration);
        
         // XML文件的命名空间
        XNamespace ns  =   " http://www.google.com/schemas/sitemap/0.84 " ;
        XElement siteMap  =   new  XElement(ns  +   " urlset " );

         string  fixedUrl  =   " http://www.freeflying.com/article " ;
         string  wholeUrl  =   string .Empty;
        
         // 循环取出数据，转换成XML节点
         foreach  (var item  in  Articles.GetArticles())
        {
            XElement url  =   new  XElement( " url " );

            wholeUrl  =   string .Format( " {0}?id={1}&catelog={2} " ,fixedUrl,item.ID,item.Catelog); 
            XElement loc  =   new  XElement( " loc " , wholeUrl);
            XElement lastmod  =   new  XElement( " lastmod " , item.LastMod.AddDays( - 23 ).ToShortDateString());
            XElement changefreq  =   new  XElement( " changefreq " , item.Frequency);
            XElement priority  =   new  XElement( " priority " , item.Weight);

            url.Add(loc, lastmod, changefreq, priority);

            siteMap.Add(url);
        }

        
        
         // 最后输出整个xml文件
        context.Response.Write(siteMap);
    }
 
     public   bool  IsReusable {
         get  {
             return   false ;
        }
    }

}

<% @ WebHandler Language = " C# "  Class = " rss "   %>

using  System;
using  System.Web;
using  System.Xml;
using  System.Xml.Linq;


public   class  rss : IHttpHandler {
    
     public   void  ProcessRequest (HttpContext context) {
        context.Response.ContentType  =   " text/xml " ;

        context.Response.Write( " <?xml version=\ " 1.0 \ "  encoding=\ " UTF - 8 \ "  ?> " );

        XElement rssFeed  =   new  XElement( " rss " ,  new  XAttribute( " version " , " 2.0 " ));

         string  fixedUrl  =   " http://www.freeflying.com/article " ;
         string  wholeUrl  =   string .Empty;

        XElement channel  =   new  XElement( " channel " ,
             new  XElement( " title " ,  " freeflying " ),
             new  XElement( " link " , fixedUrl),
             new  XElement( " description " , " the website for dream flying freely " ),
             new  XElement( " pubDate " ,DateTime.Now.ToString())
            );
        
        
         foreach  (var article  in  Articles.GetArticles())
        {
            XElement item  =   new  XElement( " item " );

            XElement title  =   new  XElement( " title " , article.Title);

            wholeUrl  =   string .Format( " {0}?id={1}&catelog={2} " , fixedUrl, article.ID, article.Catelog);
            XElement link  =   new  XElement( " link " , wholeUrl);

            XElement description  =   new  XElement( " description " , article.Description);

            XElement pubDate  =   new  XElement( " pubDate " , article.LastMod.ToString());

            item.Add(title,link,description,pubDate);

            channel.Add(item);
        }

        rssFeed.Add(channel);

        context.Response.Write(rssFeed);

    }
 
     public   bool  IsReusable {
         get  {
             return   false ;
        }
    }
    

}

using  System;
using  System.Data;
using  System.Configuration;
using  System.Linq;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.HtmlControls;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Xml.Linq;
using  System.Web.UI.MobileControls;
using  System.Collections.Generic;

///   <summary>
///  Summary description for Articles
///   </summary>
public   class  Articles
{
     public  Articles()
    {
         //
         //  TODO: Add constructor logic here
         //
    }

     public   static  List < Article >  GetArticles()
    {
         return   new  List < Article > (){
             new  Article( 234 ,  " blog " , DateTime.Now.AddDays( - 23 ), Freq.none,  0.8 ,  " asp.net seo " ,  " articles about SEO in asp.net " ),
             new  Article( 267 ,  " blog " , DateTime.Now.AddDays( - 245 ), Freq.daily,  0.6 ,  " ado.net pro " , " about the dataset usage " ),
             new  Article( 653 ,  " news " , DateTime.Now.AddDays( - 45 ), Freq.daily,  1 , " CLR via C# " , " notebook about this book " )
        };
    }


}

public   class  Article
{
     public   int  ID;
     public   string  Catelog;
     public  DateTime LastMod;
     public   double  Weight;
     public  Freq Frequency;
     public   string  Title;
     public   string  Description;

     public  Article( int  id,  string  catelog, DateTime lastMod, Freq frequency,  double  weight,  string  title,  string  description)
    {
        ID  =  id;
        Catelog  =  catelog;
        LastMod  =  lastMod;
        Weight  =  weight;
        Frequency  =  frequency;
        Title  =  title;
        Description  =  description;
    }
}

public   enum  Freq
{
    none  =   1 ,
    daily  =   2 ,
    weekly  =   3 ,
}