我对 C#、silverlight 和整个数据绑定范例比较陌生。我一直在开发一个小测试应用程序，它使用 Json.Net通过他们的API从 reddit 中提取数据。无论如何，我可以很好地将数据放入我的应用程序，但现在我无法将数据推送到 UI 中。我尝试了几种不同的配置均无济于事。无论如何，代码在这里：
public partial class MainPage : PhoneApplicationPage
{
string json = "";
RootObject topic { get; set; }
public MainPage()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
textBlock1.Text = "Retrieving...";
string url = @"http://www.reddit.com/r/all.json";
HttpWebRequest hWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
hWebRequest.Method = "GET";
hWebRequest.BeginGetResponse(Response_Completed, hWebRequest);
}
public void Response_Completed(IAsyncResult result)
{
HttpWebRequest request = (HttpWebRequest)result.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(result);
using (StreamReader streamReader = new StreamReader(response.GetResponseStream()))
{
json = streamReader.ReadToEnd();
topic = JsonConvert.DeserializeObject<RootObject>(json);
}
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
this.DataContext = topic.data.children[0].data.title;
textBlock1.Text = "Done.";
});
}
这是我的代码的主要部分。其余的类都在这里，它们用于 reddit API 提供的 JSON 的反序列化。
public class MediaEmbed
{
public string content { get; set; }
public int? width { get; set; }
public bool? scrolling { get; set; }
public int? height { get; set; }
}
public class Oembed
{
public string provider_url { get; set; }
public string description { get; set; }
public string title { get; set; }
public string url { get; set; }
public string author_name { get; set; }
public int height { get; set; }
public int width { get; set; }
public string html { get; set; }
public int thumbnail_width { get; set; }
public string version { get; set; }
public string provider_name { get; set; }
public string thumbnail_url { get; set; }
public string type { get; set; }
public int thumbnail_height { get; set; }
public string author_url { get; set; }
}
public class Media
{
public string type { get; set; }
public Oembed oembed { get; set; }
}
public class Data2
{
public string domain { get; set; }
public MediaEmbed media_embed { get; set; }
public object levenshtein { get; set; }
public string subreddit { get; set; }
public string selftext_html { get; set; }
public string selftext { get; set; }
public object likes { get; set; }
public bool saved { get; set; }
public string id { get; set; }
public bool clicked { get; set; }
public string title { get; set; }
public Media media { get; set; }
public int score { get; set; }
public bool over_18 { get; set; }
public bool hidden { get; set; }
public string thumbnail { get; set; }
public string subreddit_id { get; set; }
public string author_flair_css_class { get; set; }
public int downs { get; set; }
public bool is_self { get; set; }
public string permalink { get; set; }
public string name { get; set; }
public double created { get; set; }
public string url { get; set; }
public string author_flair_text { get; set; }
public string author { get; set; }
public double created_utc { get; set; }
public int num_comments { get; set; }
public int ups { get; set; }
}
public class Child
{
public string kind { get; set; }
public Data2 data { get; set; }
}
public class Data
{
public string modhash { get; set; }
public Child[] children { get; set; }
public string after { get; set; }
public object before { get; set; }
}
public class RootObject
{
public string kind { get; set; }
public Data data { get; set; }
}
}
假设 XAML UI 的东西看起来像这样
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock x:Name="TitleInfo" />
<TextBlock x:Name="AuthorInfo" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
标题包含在名为 topic 的 RootObject 实例中。所以获取标题的方法是
topic.data.children[0].data.title;
但是，我几乎不知道如何将其绑定到这些文本框或列表框。我知道必须设置数据上下文，并且这些项目可以通过代码而不是 xaml 绑定，但我想不出任何优雅方法来做到这一点。有什么帮助吗？万分感谢。