Updating the UI from a Background Thread
<UserControl x:Class='SilverlightApplication3.MainPage'
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
xmlns:d='http://schemas.microsoft.com/expression/blend/2008'
xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'
mc:Ignorable='d'
d:DesignWidth='640'
d:DesignHeight='480'>
<Grid x:Name="LayoutRoot" Background="White" Margin="6,6,6,6">
<StackPanel>
<Button Content="Retrieve XML and Load" Click="RetrieveXMLandLoad_Click"></Button>
<ListBox x:Name="BooksListBox" Margin="4,4,4,4" Height="452" >
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="2,2,2,2">
<TextBlock Text="{Binding Path=Author}" Margin="0,0,0,2"/>
<TextBlock Text="{Binding Path=Title}" Margin="0,0,0,2"/>
<TextBlock Width="550" Text="{Binding Path=Description}" TextWrapping="Wrap" Margin="0,0,0,10"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</Grid>
</UserControl>
//File: Page.xaml.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Xml.Linq;
namespace SilverlightApplication3
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
}
private void RetrieveXMLandLoad_Click(object sender, RoutedEventArgs e)
{
Uri location = new Uri("http://localhost:9090/Books.xml", UriKind.Absolute);
WebRequest request = HttpWebRequest.Create(location);
request.BeginGetResponse(new AsyncCallback(this.RetrieveXmlCompleted), request);
}
void RetrieveXmlCompleted(IAsyncResult ar)
{
List<Book> bookList;
HttpWebRequest request = ar.AsyncState as HttpWebRequest;
WebResponse response = request.EndGetResponse(ar);
Stream responseStream = response.GetResponseStream();
using (StreamReader streamreader = new StreamReader(responseStream))
{
XDocument xDoc = XDocument.Load(streamreader);
bookList = (from b in xDoc.Descendants("Book")
select new Book()
{
Author = b.Element("Author").Value,
Title = b.Element("Title").Value,
PublishedDate = Convert.ToDateTime(b.Element("DatePublished").Value),
NumberOfPages = b.Element("NumPages").Value,
ID = b.Element("ID").Value
}).ToList();
}
Dispatcher.BeginInvoke(() => DataBindListBox(bookList));
}
void DataBindListBox(List<Book> list)
{
BooksListBox.ItemsSource = list;
}
}
public class Book
{
public string Author { get; set; }
public string Title { get; set; }
public string ISBN { get; set; }
public string Description { get; set; }
public DateTime PublishedDate { get; set; }
public string NumberOfPages { get; set; }
public string Price { get; set; }
public string ID { get; set; }
}
}
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