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									                                Tổng quan về Silverlight
Thông tin thêm về công nghệ Silverlight có thể tham khảo tại http://silverlight.net/

Silverlight 2 includes a cross-platform, cross-browser version of the .NET Framework, and enables a rich
.NET development platform that runs in the browser.

Developers can write Silverlight applications using any .NET language (including VB, C#, JavaScript,
IronPython and IronRuby).

We will ship Visual Studio 2008 and Expression Studio tool support that enables great developer /
designer workflow and integration when building Silverlight applications.

Silverlight 2 provides a rich set of features for RIA application development. These include:

       WPF UI Framework: Silverlight 2 includes a rich WPF-based UI framework that makes building
        rich Web applications much easier. In includes a powerful graphics and animation engine, as
        well as rich support for higher-level UI capabilities like controls, layout management, data-binding,
        styles, and template skinning. The WPF UI Framework in Silverlight is a compatible subset of the
        WPF UI Framework features in the full .NET Framework, and enables developers to re-use skills,
        controls, code and content to build both rich cross browser web applications, as well as rich
        desktop Windows applications.

       Rich Controls: Silverlight 2 includes a rich set of built-in controls that developers and designers
        can use to quickly build applications. This upcoming Beta1 release includes core form controls
        (TextBox, CheckBox, RadioButton, etc), built-in layout management panels (StackPanel, Grid,
        Panel, etc), common functionality controls (Slider, ScrollViewer, Calendar, DatePicker, etc), and
        data manipulation controls (DataGrid, ListBox, etc). The built-in controls support a rich control
        templating model, which enables developers and designers to collaborate together to build highly
        polished solutions.

       Rich Networking Support: Silverlight 2 includes rich networking support. It includes out of the box
        support for calling REST, WS*/SOAP, POX, RSS, and standard HTTP services. It supports cross
        domain network access (enabling Silverlight clients to directly access resources and data from
        resources on the web). Beta1 also includes built-in sockets networking support.

       Rich Base Class Library: Silverlight 2 includes a rich .NET base class library of functionality
        (collections, IO, generics, threading, globalization, XML, local storage, etc). It includes rich APIs
        that enable HTML DOM/JavaScript integration with .NET code. It also includes LINQ and LINQ
        to XML library support (enabling easy transformation and querying of data), as well as local data
        caching and storage support. The .NET APIs in Silverlight are a compatible subset of the full
        .NET Framework.

Silverlight 2 does not require the .NET Framework to be installed on a computer in order to run. The
Silverlight setup download includes everything necessary to enable all the above features (and more we'll
be talking about shortly) on a vanilla Mac OSX or Windows machine.

The Beta1 release of Silverlight 2 is 4.3MB in size, and takes 4-10 seconds to install on a machine that
doesn't already have it. Once Silverlight 2 is installed you can browse the Web and automatically run rich
Silverlight applications within your browser of choice (IE, FireFox, Safari, etc).
                          Silverlight 2 Tutorials: Building A Simple Digg Client

To help people come up to speed with Silverlight 2, I wrote a Silverlight application and put together a
series of step by step tutorials that drill into and explain the different programming concepts behind it
(controls, layout management, networking, data-binding, styles, user controls, templates, etc). I also
added a tutorial post that demonstrates how to migrate the application outside of the browser and make it
a desktop application using WPF and the full .NET Framework.

Below are the pointers to the 8 tutorials I've put together:

       Part 1: Creating "Hello World" with Silverlight 2 and VS 2008
       Part 2: Using Layout Management
       Part 3: Using Networking to Retrieve Data and Populate a DataGrid
       Part 4: Using Style Elements to Better Encapsulate Look and Feel
       Part 5: Using the ListBox and DataBinding to Display List Data
       Part 6: Using User Controls to Implement Master/Details Scenarios
       Part 7: Using Templates to Customize Control Look and Feel
       Part 8: Creating a Digg Desktop Version of our Application using WPF

The application I've built the tutorials around is a simple search front end to the popular Digg.com site,
and allows users to type in search topics and browse Digg stories that match them.

Click here to download a completed version of this Digg client sample.

All of the UI in the application is built using Silverlight's WPF framework. The application uses the
Silverlight networking stack and cross-domain access support to query the Digg REST API directly, and
uses LINQ and LINQ to XML to query/transform the returned data into DiggStory objects that I databind
the UI against:
The application supports a master/details data interaction model that allows users to select stories from
the search list and quickly drill into more details about them. A user can jump to the Digg article directly
from the details form, or close it and pick another story to drill into:
The entire application is implemented in about 35 lines of C# code and 75 lines of XAML page/user-
control markup. It only uses controls and libraries built-into Silverlight.

Click here to download a completed version of this Digg client sample.

If you have used WPF before the UI concepts I discuss in the tutorial series will all be very familiar. If you
haven't used WPF before, the tutorials should provide a good overview of the fundamental programming
concepts in it, and hopefully provide you with the basic knowledge necessary to start building Silverlight 2
applications with VS 2008 when Beta1 comes out.

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