LinQ To XML——用LinQ查询XML

public   void  MyDescendants()
        {
            XDocument xdoc  =  XDocument.Load(Server.MapPath( " hamlet.xml " ));
             // 查找元素名为PERSONA 的元素
            var query  =  from people  in  xdoc.Descendants( " PERSONA " )
                        select people.Value;
             // people 是符合条件元素结果集 而people.Value;就是这个结果集的所有元素的值的序列
            Response.Write(query.Count()  +   "  个玩家被找到。 " );

            Response.Write( " <p />他们是： <p /> " );

             foreach  (var item  in  query)
            {
                 // 输出他们的值
                Response.Write( item  +   " <br /> " );

            }
        } 

public   void  MyRSS()
       {
            // 通过下面的代码你可以看到一个简单的网页RSS阅读器
           XDocument xdoc  =  XDocument.Load( @" http://www.cnblogs.com/TerryFeng/rss " );
            // 找到channel元素集合
           var query  =  from rssFeed  in  xdoc.Descendants( " channel " )
                       select  new
                       {
                           Title  =  rssFeed.Element( " title " ).Value, // 获取其下的title元素的值组成新结果集匿名对象的属性
                           Description  =  rssFeed.Element( " description " ).Value, // 获取其下的description元素的值组成新结果集匿名对象的属性
                           Link  =  rssFeed.Element( " link " ).Value, // 获取其下的link元素的值组成新结果集匿名对象的属性
                       };

            foreach  (var item  in  query)
           {
               Response.Write( " 博客:  "   +  item.Title  +   " <br /> " );
               Response.Write( " 描述:  "   +  item.Description  +   " <br /> " );
               Response.Write( " 地址:  "   +  item.Link  +   " <br /><p /> " );
           }

            // 第二个查询，查询文档中的item元素，每个项目就是一个博客随笔
           var queryPosts  =  from myPosts  in  xdoc.Descendants( " item " )
                            select  new
                            {
                                Title  =  myPosts.Element( " title " ).Value,
                                Published  =  DateTime.Parse( myPosts.Element( " pubDate " ).Value),
                                Description  =  myPosts.Element( " description " ).Value,
                                Url  =  myPosts.Element( " link " ).Value,
                                Comments  =  myPosts.Element( " comments " ).Value,
                            };

            foreach  (var item  in  queryPosts)
           {
               Response.Write( " 标题:  "   +  item.Title  +   " <br /> " );
               Response.Write( " 发布日期:  "   +  item.Published  +   " <br /> " );
               Response.Write( " 链接:  "   +  item.Url  +   " <br /> " );
               Response.Write( " 内容:  "   +  item.Description  +   " <br /> " );
               Response.Write( " 注释:  "   +  item.Comments  +   " <br /><p /> " );
               

           }

           Console.ReadLine();
     
 }