一步一步学Silverlight 2系列（17）：数据与通信之ADO.NET Data Services

概述

准备知识

简单示例

public class Post
{
    public int Id { get; set; }
    public String title { get; set; }
    public String Author { get; set; }
}

public class Post
{
    [DataWebKey]
    public int Id { get; set; }
    public String title { get; set; }
    public String Author { get; set; }
}

public class Blog
{
    public Blog()
    {
        _post.Add(new Post { Id = 1,title = "一步一步学Silverlight 2系列（13）：数据与通信之Webrequest",Author = "TerryLee" });
        _post.Add(new Post { Id = 2,title = "一步一步学Silverlight 2系列（12）：数据与通信之WebClient",Author = "TerryLee" });
        _post.Add(new Post { Id = 3,title = "一步一步学Silverlight 2系列（11）：数据绑定",Author = "TerryLee" });
        _post.Add(new Post { Id = 4,title = "一步一步学Silverlight 2系列（10）：使用用户控件",Author = "TerryLee" });
        _post.Add(new Post { Id = 5,title = "一步一步学Silverlight 2系列（9）：使用控件模板",Author = "TerryLee" });
        _post.Add(new Post { Id = 6,title = "一步一步学Silverlight 2系列（8）：使用样式封装控件观感",Author = "TerryLee" });
    }
    List<Post> _post = new List<Post>();
    public IQueryable<Post> Posts
    {
        get { return _post.AsQueryable<Post>(); }
    }
}

public class BlogDataservice : WebDataservice<Blog>
{
    public static void Initializeservice(IWebDataserviceConfiguration config)
    {
        config.SetresourceContainerAccessRule("*",resourceContainerRights.AllRead);
    }
}

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Feed xml:base="[url]http://localhost:8081/BlogDataservice.svc/[/url]" ......>
  <id>[url]http://localhost:8081/BlogDataservice.svc/Posts[/url]</id>
  <updated />
  <title>Posts</title>
  <link rel="self" href="Posts" title="Posts" />
  <entry adsm:type="TerryLee.SilverlightWithDataserviceDemoWeb.Post">
    <id>[url]http://localhost:8081/BlogDataservice.svc/Posts[/url](1)</id>
    <updated />
    <title />
    <author>
      <name />
    </author>
    <link rel="edit" href="Posts(1)" title="Post" />
    <content type="application/xml">
      <ads:Id adsm:type="Int32">1</ads:Id>
      <ads@R_130_6964@>一步一步学Silverlight 2系列（13）：数据与通信之Webrequest</ads@R_130_6964@>
      <ads:Author>TerryLee</ads:Author>
    </content>
  </entry>

private void UserControl_Loaded(object sender,RoutedEventArgs E)
{
    Uri uri = new Uri("http://localhost:8081/BlogDataservice.svc/Posts");
    WebClient client = new WebClient();
    client.openReadCoR_929_11845@pleted += new OpenReadCoR_929_11845@pletedEventHandler(client_OpenReadCoR_929_11845@pleted);
    client.openReadAsync(uri);
}
void client_OpenReadCoR_929_11845@pleted(object sender,OpenReadCoR_929_11845@pletedEventArgs E)
{
    if (e.Error == null)
    {
        
    }
}

XmlReader reader = XmlReader.Create(e.Result);
XDocument postdoc = XDocument.Load(reader);
XNamespace xmlns = "http://www.w3.org/2005/Atom";
XNamespace ads = "http://scheR_929_11845@as.microsoft.com/ado/2007/08/dataweb";
var posts = from x in postdoc.Descendants(xmlns + "entry")
            SELEct new Post
            {
                Id = int.Parse(x.Descendants(ads + "Id").First().value),title = x.Descendants(ads + "title").First().Value,Author = x.Descendants(ads + "Author").First().Value
            };
Posts.Itemssource = posts;

private void UserControl_Loaded(object sender,OpenReadCoR_929_11845@pletedEventArgs E)
{
    if (e.Error == null)
    {
        XmlReader reader = XmlReader.Create(e.Result);
        XDocument postdoc = XDocument.Load(reader);
        XNamespace xmlns = "http://www.w3.org/2005/Atom";
        XNamespace ads = "http://scheR_929_11845@as.microsoft.com/ado/2007/08/dataweb";
        var posts = from x in postdoc.Descendants(xmlns + "entry")
                    SELEct new Post
                    {
                        Id = int.Parse(x.Descendants(ads + "Id").First().value),Author = x.Descendants(ads + "Author").First().Value
                    };
        Posts.Itemssource = posts;
    }
}

结束语