Amazon Search in XAML

I have just been playing with some XAML databinding. I was interested by the Channel 9 Example which creates an RSS reader in just a couple of lines of XAML

I hooked it up to Amazons REST API. I had a couple of problems with it that I will go into later. But what follows is the XAML that I used [also it can be downloaded from my server]:

<StackPanel
xmlns="http://schemas.microsoft.com/winfx/avalon/2005" xmlns:x="http://schemas.microsoft.com/winfx/xaml/2005" Margin="10">
<StackPanel.Resources>
<XmlDataNamespaceManager x:Key="NS">
<XmlNamespace Prefix="a"
Uri
="http://webservices.amazon.com/ AWSECommerceService /2005-10-05" />
</XmlDataNamespaceManager>
<XmlDataSource x:Key="Amazon" XmlNamespaceManager="{StaticResource NS}"
Source="http://webservices.amazon.co.uk/onca/xml?Service=AWSECommerceService&
AssociateTag=cnetfra-21& AWSAccessKeyId=[SUBSCRIPTION ID]&
SearchIndex=Books& Keywords=AJAX& BrowseNode=71& ResponseGroup=Request,Large,Images& Sort=salesrank& Operation=ItemSearch"/>

<DataTemplate x:Key="TitleTemplate">
<TextBlock TextContent="{Binding XPath=a:ASIN}" />
</DataTemplate>
</StackPanel.Resources>

<Label Content="{Binding Source={StaticResource Amazon}, XPath=/a:ItemSearchResponse/a:OperationRequest/ a:HTTPHeaders/a:Header/@Name}" FontSize="24" FontWeight="Bold" />

<DockPanel DataContext="{Binding Source={StaticResource Amazon},
XPath=/a:ItemSearchResponse/a:Items/a:Item}" Height="300px" >
<ListBox DockPanel.Dock="Left" Binding.XmlNamespaceManager="{StaticResource NS}"
ItemsSource="{Binding}" ItemTemplate="{StaticResource TitleTemplate}" IsSynchronizedWithCurrentItem="True" />
<TextBox Name="Contents" Text="{Binding XPath=a:ItemAttributes/a:Title}" Wrap="True" Width="Auto" />
</DockPanel>
</StackPanel>

The major problem that I had was that the AMAZON API has a default namespace, therefore to be able to use XPath against the datasource you need to include a NamespaceManager so that the XPath queries are resolved correctly. Once this is done everything is really simple.

Now this example I have created leaves a lot to be desired, but you can see how easy it to create.

Technorati Tags

amazon search [feed], xaml [feed], rss reader [feed], amazon [feed], channel 9 [feed], webservices [feed], api [feed], xml [feed], search [feed], webservice [feed], rss [feed], wpf [feed]

Related Wikipedia Documents

XAML, RSS (file format), Windows API, Windows Vista, Windows Presentation Foundation, RSS (file format), Amazon.com, User interface markup language, Wikipedia: Channel 9, Channel9, Application programming interface, Web service, Microsoft .NET, Web service

My Related Documents

C#, .Net Framework: EBay Offering Free API Usage, C#, .Net Framework: XML and Perl, AJAX Tagger v2.0, C#, .Net Framework: Web Service List, C#, .Net Framework: C# 3.0 and LINQ

Related Amazon Books

Programming Windows Presentation Foundation: (UK)/(USA), Service-Oriented Architecture: Concepts, Technology, and Design: (UK)/(USA), Service-oriented Architecture: A Field Guide to Integrating XML and Web Services: (UK)/(USA), Mining Amazon Web Services: Building Applications with the Amazon API: (UK)/(USA), Professional Web APIs with PHP: Google, EBay, Paypal, Amazon, Yahoo, Fedex: (UK)/(USA), Amazon Hacks: (UK)/(USA), MCAD Training Guide 70-320: Developing XML Web Services and Server Components with Visual C#.NET and the .NET Framework: (UK)/(USA), Expert Service-Oriented Architecture in C#: Using the Web Services Enhancements 2.0: (UK)/(USA), RSS and Atom Hacks: (UK)/(USA), RSS and Atom: Understanding and Implementing Content Feeds and Syndication: (UK)/(USA)

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