silverlight xml查询

因为对linq不熟,所以不想用linq查询,所以用最土的方法,如果有好方法的话,还请告之.

xml文件

 

代码

<? xml version = " 1.0 "  encoding = " utf-8 "   ?>
< bookstore >
     < book genre = ' Silverlight '  publicationdate = ' 12-22-2008 '  ISBN = ' 978-0470193938 ' >
         < title > Professional Silverlight  2 </ title >
         < author >
             < first - name > Mike </ first - name >
             < last - name > Meyers </ last - name >
         </ author >
         < price > 49.99 </ price >
     </ book >
     < book genre = ' Silverlight '  publicationdate = ' 02-15-2009 '  ISBN = ' 978-1933988573 ' >
         < title > Hacking Silverlight  2 </ title >
         < author >
             < first - name > David </ first - name >
             < last - name > Kelley </ last - name >
         </ author >
         < price > 44.99 </ price >
     </ book >
     < book genre = ' ASP.NET '  publicationdate = ' 10-20-2008 '  ISBN = ' 978-0735626218 ' >
         < title > Microsoft ASP.NET and AJAX: Architecting Web Applications </ title >
         < author >
             < first - name > Dino </ first - name >
             < last - name > Esposito </ last - name >
         </ author >
         < price > 39.99 </ price >
     </ book >
</ bookstore >

 

 

xmlquery.xaml

 

代码

   < Canvas x:Name = " LayoutRoot "  Background = " White " >
         < TextBlock Text = " 输入图书类型： "  Width = " 180 "  Canvas.Left = " 10 "  Canvas.Top = " 10 "  FontSize = " 14 "   />
         < TextBox x:Name = " TextBoxGenre "  Width = " 180 "  Height = " 30 "  FontSize = " 14 "
            Canvas.Left = " 10 "  Canvas.Top = " 50 "   />
         < Button x:Name = " ButtonGenre "  Content = " 确定 "  Width = " 120 "  Height = " 40 "
            Canvas.Left = " 40 "  Canvas.Top = " 100 "   Click = " ButtonGenre_Click "   />
         < TextBlock Text = " 输入作者姓名： "  Width = " 180 "  Canvas.Left = " 210 "  Canvas.Top = " 10 "  FontSize = " 14 "   />
         < TextBox x:Name = " TextBoxAuthor "  Width = " 180 "  Height = " 30 "  FontSize = " 14 "
            Canvas.Left = " 210 "  Canvas.Top = " 50 "   />
         < Button x:Name = " ButtonAuthor "  Content = " 确定 "  Width = " 120 "  Height = " 40 "
            Canvas.Left = " 240 "  Canvas.Top = " 100 "   Click = " ButtonAuthor_Click " />
         < TextBlock x:Name = " TextBlockResult "  Text = " 查询结果： "  FontSize = " 14 "
            Canvas.Left = " 10 "  Canvas.Top = " 150 "  TextWrapping = " Wrap "   />
     </ Canvas >

 

xmlquery.xaml.cs

 

代码

XmlReader reader;
         string  author;
         public  xmlquery()
        {
            InitializeComponent();
            DownloadFile();
        }
         private   void  ButtonGenre_Click( object  sender, RoutedEventArgs e)
        {
             string  genre  =  TextBoxGenre.Text;           
             while  (reader.Read())
            {
                 if  (reader.ReadToFollowing( " book " ))
                {
                    reader.MoveToAttribute( " genre " );
                    reader.GetAttribute( " genre " );
                     string  strgenre  =  reader.Value;
                     if  (strgenre  ==  genre)
                    {
                         if  (reader.ReadToFollowing( " title " ))
                        {
                             string  title =     reader.ReadElementContentAsString();
                            TextBlockResult.Text  +=   " \n书名： "   +  title;
                        }                        
                    }
                }
            }
            reader.Close();
        }
         private   void  RequestProceed(IAsyncResult asyncResult)
        {
            HttpWebRequest request  =  asyncResult.AsyncState  as  HttpWebRequest;
            Stream requestStream  =  request.EndGetRequestStream(asyncResult);
             using  (StreamWriter writer  =   new  StreamWriter(requestStream))
            {
                writer.Write( " author= "   +  author);
                writer.Flush();
            }
            request.BeginGetResponse( new  AsyncCallback(ResponseProceed), request);
        }
         void  ResponseProceed(IAsyncResult asyncResult)
        {
            HttpWebRequest request  =  asyncResult.AsyncState  as  HttpWebRequest;
            HttpWebResponse response  =  request.EndGetResponse(asyncResult)  as  HttpWebResponse;
            Stream responseStream  =  response.GetResponseStream();
            StreamReader reader  =   new  StreamReader(responseStream);
            Action < StreamReader >  showInfo  =   this .ShowBookInfo;
             this .Dispatcher.BeginInvoke(showInfo, reader);
        }
         void  ShowBookInfo(StreamReader reader)
        {
            TextBlockResult.Text  =   " 查询结果：\n "   +  reader.ReadToEnd();
        }

         private   void  ButtonAuthor_Click( object  sender, RoutedEventArgs e)
        {
            author  =  TextBoxAuthor.Text;
            Uri address  =   new  Uri( " http://localhost:4995/BookStoreHandler.ashx " );
            HttpWebRequest request  =  WebRequest.Create(address)  as  HttpWebRequest;
            request.Method  =   " POST " ;
            request.ContentType  =   " application/x-www-form-urlencoded " ;
            request.BeginGetRequestStream( new  AsyncCallback(RequestProceed), request);

        }
         private   void  DownloadFile()
        {
            WebClient client  =   new  WebClient();
            Uri address  =   new  Uri( " http://localhost:4995/bookstore.xml " );
            client.DownloadStringCompleted  +=   new  DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
            client.DownloadStringAsync(address);

        }
         void  client_DownloadStringCompleted( object  sender, DownloadStringCompletedEventArgs e)
        {
            StringReader xmlString  =   new  StringReader(e.Result);
            reader  =  XmlReader.Create(xmlString);

        }

BookStoreHandler.cs

 

代码

public   void  ProcessRequest(HttpContext context)
        {

             // string genre = context.Request.Form["genre"].ToString();
             // string result = GetBookInfo(genre);

             string  author  =  context.Request.Form[ " author " ].ToString();
             string  result  =  GetBookInfobyname(author);
            context.Response.Write(result);
            
        }
  private   string  GetBookInfobyname( string  name)
        {
            StringBuilder builder  =   new  StringBuilder();

            XmlDocument document  =   new  XmlDocument();
            document.Load( " http://localhost:4995/bookstore.xml " );
            XmlNodeList xmlnodelist  =  document.SelectNodes( " bookstore/book " );
             foreach  (XmlNode xmlnode  in  xmlnodelist)
            {
                 string  title  =  xmlnode.SelectSingleNode( " author/last-name " ).InnerText.Trim();
                 if  (title  ==  name)
                {
                    
                    builder.Append( " 书名： " );
                    builder.Append(xmlnode.SelectSingleNode( " title " ).FirstChild.Value);
                    builder.Append( " 价格： " );
                    builder.Append(xmlnode.SelectSingleNode( " price " ).FirstChild.Value);
                }
                

            }
             return  builder.ToString();
        }