调用REST服务，处理JSON格式, XML格式, RSS/ATOM格式的数据(转)

using System;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Activation;

using System.ServiceModel.Web;
using System.Collections.Generic;
using System.Text;
using System.IO;

/**/ /// <summary>
/// 提供 REST 服务的类
/// 注：Silverlight只支持 GET 和 POST
/// </summary>
[ServiceContract]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class REST
{
     /**/ /// <summary>
     /// 用于演示返回 JSON（对象）的 REST 服务
     /// </summary>
     /// <param name="name"></param>
     /// <returns></returns>
    [OperationContract]
    [WebGet(UriTemplate = " User/{name}/json ", ResponseFormat = WebMessageFormat.Json)]
     public User HelloJson( string name)
    {
         return new User { Name = name, DayOfBirth = new DateTime( 1980, 2, 14) };
    }

     /**/ /// <summary>
     /// 用于演示返回 JSON（集合）的 REST 服务
     /// </summary>
     /// <returns></returns>
    [OperationContract]
    [WebGet(UriTemplate = " Users/json ", ResponseFormat = WebMessageFormat.Json)]
     public List<User> HelloJson2()
    {
         return new List<User>
        {
             new User(){ Name = " webabcd01 ", DayOfBirth = new DateTime( 1980, 1, 1) },
             new User(){ Name = " webabcd02 ", DayOfBirth = new DateTime( 1980, 2, 2) },
             new User(){ Name = " webabcd03 ", DayOfBirth = new DateTime( 1980, 3, 3) },
        };
    }
}

< UserControl x:Class ="Silverlight20.Communication.Json"
    xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >
     < StackPanel HorizontalAlignment ="Left" Width ="600" >

         < TextBox x:Name ="txtMsgJson" Margin ="5" />
         < TextBox x:Name ="txtMsgJson2" Margin ="5" />

     </ StackPanel >
</ UserControl >

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using System.IO;

namespace Silverlight20.Communication
{
     public partial class Json : UserControl
    {
         public Json()
        {
            InitializeComponent();

             // 演示如何处理 JSON（对象）
            JsonDemo();

             // 演示如何处理 JSON（集合）
            JsonDemo2();
        }

         /**/ /// <summary>
         /// 演示如何处理 JSON（对象）
         /// </summary>
         void JsonDemo()
        {
             // REST 服务的 URL
            Uri uri = new Uri( " http://localhost:3036/REST.svc/User/webabcd/json ", UriKind.Absolute);

             // 实例化 WebClient
            System.Net.WebClient client = new System.Net.WebClient();

            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(json_DownloadStringCompleted);
            client.DownloadStringAsync(uri);

            txtMsgJson.Text = " 读取 JSON（对象）数据中。。。 ";
        }

         void json_DownloadStringCompleted( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error != null)
            {
                 // 发生错误的话，则打印出来
                txtMsgJson.Text = e.Error.ToString();
                 return;
            }

             // 将获得的字符串转换为 JSON（对象）
            var buffer = System.Text.Encoding.UTF8.GetBytes(e.Result);
            var ms = new MemoryStream(buffer);
            var jsonObject = System.Json.JsonObject.Load(ms) as System.Json.JsonObject;

            txtMsgJson.Text = e.Result + " \r\n ";
             // 解析 JSON（对象）
            txtMsgJson.Text += string.Format( " 姓名: {0}, 生日: {1} ",
                ( string)jsonObject[ " Name "],
                ((DateTime)jsonObject[ " DayOfBirth "]).ToString( " yyyy-MM-dd "));

             /**//*
             * 总结：
             * JsonObject - 一个具有零或多个 key-value 对的无序集合。继承自抽象类 JsonValue
             *     JsonObject.Load(Stream) - 将指定的字符串流反序列化为 JSON 对象（CLR可用的类型）
             *     JsonObject[key] - JsonObject 索引器，获取 JsonObject 的指定key的value
             *     JsonObject.ContainsKey(key) - JsonObject 对象内是否具有指定的key
              */
        }

         /**/ /// <summary>
         /// 演示如何处理 JSON（集合）
         /// </summary>
         void JsonDemo2()
        {
             // REST 服务的 URL
            Uri uri = new Uri( " http://localhost:3036/REST.svc/Users/json ", UriKind.Absolute);

             // 实例化 WebClient
            System.Net.WebClient client = new System.Net.WebClient();

            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(json2_DownloadStringCompleted);
            client.DownloadStringAsync(uri);

            txtMsgJson2.Text = " 读取 JSON（集合）数据中。。。 ";
        }

         void json2_DownloadStringCompleted( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error != null)
            {
                 // 发生错误的话，则打印出来
                txtMsgJson2.Text = e.Error.ToString();
                 return;
            }

             // 将获得的字符串转换为 JSON（集合）
            var buffer = System.Text.Encoding.UTF8.GetBytes(e.Result);
            var ms = new MemoryStream(buffer);
            var jsonArray = System.Json.JsonArray.Load(ms) as System.Json.JsonArray;

            txtMsgJson2.Text = e.Result + " \r\n ";
            txtMsgJson2.Text += string.Format( " 姓名: {0}, 生日: {1} ",
                ( string)jsonArray.First()[ " Name "],
                ((DateTime)jsonArray.Single(p => p[ " Name "] == " webabcd02 ")[ " DayOfBirth "]).ToString( " yyyy-MM-dd "));

             /**//*
             * 总结：
             * JsonArray - 一个具有零或多个 JsonValue（抽象类，JsonObject和JsonArray都继承自此类）对象的有序序列
             *     JsonArray.Load(Stream) - 将指定的字符串流反序列化为 JSON 对象（CLR可用的类型）
             *     JsonArray[index] - JsonArray 索引器，获取 JsonArray 的指定索引的 JsonValue
             *     JsonArray 支持 LINQ
              */
        }
    }
}

using System;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Activation;

using System.ServiceModel.Web;
using System.Collections.Generic;
using System.Text;
using System.IO;

/**/ /// <summary>
/// 提供 REST 服务的类
/// 注：Silverlight只支持 GET 和 POST
/// </summary>
[ServiceContract]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class REST
{
     /**/ /// <summary>
     /// 用于演示返回 XML（对象）的 REST 服务
     /// </summary>
     /// <param name="name"></param>
     /// <returns></returns>
    [OperationContract]
    [WebGet(UriTemplate = " User/{name}/xml ", ResponseFormat = WebMessageFormat.Xml)]
     public User HelloXml( string name)
    {
         return new User { Name = name, DayOfBirth = new DateTime( 1980, 2, 14) };
    }

     /**/ /// <summary>
     /// 用于演示返回 XML（集合）的 REST 服务
     /// </summary>
     /// <returns></returns>
    [OperationContract]
    [WebGet(UriTemplate = " Users/xml ", ResponseFormat = WebMessageFormat.Xml)]
     public List<User> HelloXml2()
    {
         return new List<User>
        {
             new User(){ Name = " webabcd01 ", DayOfBirth = new DateTime( 1980, 1, 1) },
             new User(){ Name = " webabcd02 ", DayOfBirth = new DateTime( 1980, 2, 2) },
             new User(){ Name = " webabcd03 ", DayOfBirth = new DateTime( 1980, 3, 3) },
        };
    }
}

< UserControl x:Class ="Silverlight20.Communication.Xml"
    xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >
     < StackPanel HorizontalAlignment ="Left" Width ="600" >

         < TextBox x:Name ="txtMsgXml" Margin ="5" />
         < TextBox x:Name ="txtMsgXml2" Margin ="5" />

     </ StackPanel >
</ UserControl >

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using System.Xml.Linq;
using System.IO;

namespace Silverlight20.Communication
{
     public partial class Xml : UserControl
    {
         public Xml()
        {
            InitializeComponent();

             // 演示如何处理 XML（对象）
            XmlDemo();

             // 演示如何处理 XML（集合）
            XmlDemo2();
        }

         /**/ /// <summary>
         /// 演示如何处理 XML（对象）
         /// </summary>
         void XmlDemo()
        {
             // REST 服务的 URL
            Uri uri = new Uri( " http://localhost:3036/REST.svc/User/webabcd/xml ", UriKind.Absolute);

             // 实例化 WebClient
            System.Net.WebClient client = new System.Net.WebClient();

            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(xml_DownloadStringCompleted);
            client.DownloadStringAsync(uri);

            txtMsgXml.Text = " 读取 XML（对象）数据中。。。 ";
        }

         void xml_DownloadStringCompleted( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error != null)
            {
                 // 发生错误的话，则打印出来
                txtMsgXml.Text = e.Error.ToString();
                 return;
            }

             // 将获得的字符串转换为 XML（对象）
            var buffer = System.Text.Encoding.UTF8.GetBytes(e.Result);
            var ms = new MemoryStream(buffer);

            XElement xmlObject = XElement.Load(ms);

            txtMsgXml.Text = e.Result + " \r\n ";
            XNamespace ns = " http://webabcd.cnblogs.com/ ";
            txtMsgXml.Text += string.Format( " 姓名: {0}, 生日: {1} ",
                ( string)xmlObject.Element(ns + " Name "),
                ((DateTime)xmlObject.Element(ns + " DayOfBirth ")).ToString( " yyyy-MM-dd "));

             /**//*
             * 总结：
             * XElement - 表示一个 XML 元素
             *     XElement.Element - XML 元素内的 XML 元素
             *     XElement.Attribute - XML 元素内的 XML 属性
             *     XElement.Load(Stream) - 使用指定流创建一个 XElement 对象
             *     XElement.Parse(String) - 解析指定的 XML 字符串为一个 XElement 对象
             * XAttribute - 表示一个 XML 属性
              */
        }

         /**/ /// <summary>
         /// 演示如何处理 XML（集合）
         /// </summary>
         void XmlDemo2()
        {
             // REST 服务的 URL
            Uri uri = new Uri( " http://localhost:3036/REST.svc/Users/xml ", UriKind.Absolute);

             // 实例化 WebClient
            System.Net.WebClient client = new System.Net.WebClient();

            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(xml2_DownloadStringCompleted);
            client.DownloadStringAsync(uri);

            txtMsgXml2.Text = " 读取 XML（集合）数据中。。。 ";
        }

         void xml2_DownloadStringCompleted( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error != null)
            {
                 // 发生错误的话，则打印出来
                txtMsgXml2.Text = e.Error.ToString();
                 return;
            }

             // 将获得的字符串转换为 XML（集合）
            XDocument xmlObject = XDocument.Parse(e.Result);

            txtMsgXml2.Text = e.Result + " \r\n ";
            XNamespace ns = " http://webabcd.cnblogs.com/ ";
            var obj = from p in xmlObject.Elements(ns + " ArrayOfUser ").Elements(ns + " User ")
                       where p.Element(ns + " Name ").Value == " webabcd02 "
                      select new { Name = ( string)p.Element(ns + " Name "), DayOfBirth = (DateTime)p.Element(ns + " DayOfBirth ") };

            txtMsgXml2.Text += string.Format( " 姓名: {0}, 生日: {1} ",
                obj.First().Name,
                obj.First().DayOfBirth.ToString( " yyyy-MM-dd "));

             /**//*
             * 总结：
             * LINQ to XML 相当的方便
              */
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Proxy : System.Web.UI.Page
{
     protected void Page_Load( object sender, EventArgs e)
    {
         // 获取某个 url 地址的 html 并在页面上输出

         string url = Request.QueryString[ " url "];

        System.Net.WebClient client = new System.Net.WebClient();
        client.Encoding = System.Text.Encoding.UTF8;

        Response.Write(client.DownloadString(url));
        Response.End();
    }
}

< UserControl x:Class ="Silverlight20.Communication.RssAtom"
    xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >
     < StackPanel HorizontalAlignment ="Left" >

         < TextBox x:Name ="txtMsgRss" Width ="600" Margin ="5" />

         < StackPanel Orientation ="Horizontal" >

             < ListBox x:Name ="list" Width ="300" Margin ="5" SelectionChanged ="list_SelectionChanged" >
                 < ListBox.ItemTemplate >
                     < DataTemplate >
                         < TextBlock Text =" {Binding Title.Text} " ></ TextBlock >
                     </ DataTemplate >
                 </ ListBox.ItemTemplate >
             </ ListBox >

             < TextBlock x:Name ="detail" Width ="300" Margin ="5" Text =" {Binding Summary.Text} " TextWrapping ="Wrap" />

         </ StackPanel >

     </ StackPanel >
</ UserControl >

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using System.Xml;
using System.IO;
using System.ServiceModel.Syndication;

namespace Silverlight20.Communication
{
     public partial class RssAtom : UserControl
    {
         public RssAtom()
        {
            InitializeComponent();

             // 演示如何处理 Rss/Atom
            RssDemo();
        }

         /**/ /// <summary>
         /// 演示如何处理 Rss/Atom
         /// </summary>
         void RssDemo()
        {
             // 让一个代理页面去请求相关的 Rss/Atom（如果用Silverlight直接去请求，则需要在目标域的根目录下配置策略文件）
            Uri uri = new Uri( " http://localhost:3036/Proxy.aspx?url=http://webabcd.cnblogs.com/rss ", UriKind.Absolute);

             // 实例化 WebClient
            System.Net.WebClient client = new System.Net.WebClient();

            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(rss_DownloadStringCompleted);
            client.DownloadStringAsync(uri);

            txtMsgRss.Text = " 读取 RSS 数据中。。。 ";
        }

         void rss_DownloadStringCompleted( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error != null)
            {
                 // 发生错误的话，则打印出来
                txtMsgRss.Text = e.Error.ToString();
                 return;
            }

             // 将获得的字符串转换为 XmlReader
            var buffer = System.Text.Encoding.UTF8.GetBytes(e.Result);
            var ms = new MemoryStream(buffer);
            XmlReader reader = XmlReader.Create(ms);

             // 从指定的 XmlReader 中加载，以生成 SyndicationFeed
            SyndicationFeed feed = SyndicationFeed.Load(reader);

             // 设置 list 的数据源为 Rss/Atom 的项集合（SyndicationFeed.Items）
            list.ItemsSource = feed.Items;
            txtMsgRss.Text = e.Result + " \r\n ";
        }

         private void list_SelectionChanged( object sender, SelectionChangedEventArgs e)
        {
             // 设置 detail 的数据上下文为 Rss/Atom 的指定项（SyndicationItem）
            detail.DataContext = list.SelectedItem as SyndicationItem;
        }
    }
}

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调用REST服务，处理JSON格式, XML格式, RSS/ATOM格式的数据(转)

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