Silverlight 4权威指南：初级与中级开发者实用教程

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《Silverlight 4 Unleashed》是一本由Pearson Education出版的专业书籍，专为初级和中级Silverlight开发者精心打造。本书全面介绍了Silverlight 4的最新技术和应用，它是Microsoft Silverlight平台的第四代版本，旨在帮助读者深入理解和掌握这个强大的富互联网应用程序(RIA)开发框架。Silverlight 4 Unleashed涵盖了丰富的主题，包括但不限于： 1. **基础介绍**：对于初学者，章节将从Silverlight 4的概述、安装与配置开始，让读者对平台的基本概念有清晰的认识。 2. **核心功能**：书中详细讲解了Silverlight 4的核心特性，如XAML（可扩展应用程序标记语言）的使用，以及如何构建用户界面、数据绑定、多媒体处理等关键组件。 3. **编程与控制**：内容涉及C#和Visual Basic.NET在Silverlight中的应用，包括事件处理、命令模式、MVVM设计模式（Model-View-ViewModel）的实践。 4. **网络与通信**：书中讨论了Silverlight与Web服务的交互，RESTful API的使用，以及XMLHttpRequest Level 2的支持，这些都是在分布式应用中至关重要的部分。 5. **多媒体和图形处理**：Silverlight 4在多媒体方面的强大性能被重点介绍，包括视频播放、音频处理、图像编辑以及3D图形渲染技术。 6. **安全与隐私**：随着Web应用的复杂性增加，安全性和隐私问题变得尤为重要。书中会探讨如何实现数据加密、安全策略和跨域访问控制。 7. **部署与调试**：针对实际项目，本书还涵盖部署流程、调试工具的使用，以及性能优化和故障排查的策略。 8. **案例研究与最佳实践**：作者通过实例演示和实战项目，分享了他在开发过程中的经验和教训，帮助读者避免常见问题，提升开发效率。 9. **资源和社区支持**：最后，书中会列出相关的学习资源、开发者社区和API文档链接，以便读者进一步探索和扩展知识。《Silverlight 4 Unleashed》不仅适合想要深入学习Silverlight 4的开发者，也是现有开发者升级技能、保持与时俱进的重要参考书。版权信息强调了版权保护和责任声明，确保读者在合法范围内获取和使用内容。整体而言，这是一本实用且权威的Silverlight 4技术指南。

Contents 
xv
Implementing Multitouch in Silverlight. ..................................................557
Getting the Right Computer .............................................................558 
Investigating Existing Elements ........................................................559 
Using Multitouch Libraries. ..............................................................560 
Scaling, Rotating, and Translating . ..................................................560 
Implementing a Multitouch Application..........................................561 
Using Multitouch in Windows Phone 7 Applications......................563 
Finding More Information . ..............................................................563
Enabling Local Communication . ..............................................................563
Understanding the Restrictions.........................................................564 
Building a Receiver . ..........................................................................564 
Building a Sender. .............................................................................565 
Testing the Application . ...................................................................567
Mapping with the Bing Maps Control . .....................................................567
Adding the Map.................................................................................568 
Getting Location Information and Marking It .................................569 
Getting More Information ................................................................571
Summary .....................................................................................................571
20  Building Extensible and Maintainable Applications 
573
Inverting Dependencies with Unity . .........................................................573
Refactoring to Smaller and Simpler Classes ......................................575 
Setting Up the Services . ....................................................................578 
Calling the 
Setup Method and Wiring Up .......................................582 
Discovering More About Unity . .......................................................583
Composing an Application with MEF. ......................................................583
Exporting and Importing ..................................................................584 
Downloading on Demand.................................................................594 
What About Prism? . .........................................................................603
Using an MVVM Framework . ....................................................................604
Discovering the Components ...........................................................604 
Sending Messages . ............................................................................604
Summary .....................................................................................................607
21  Optimizing Performance 
609
Improving the XAP Download Time. ........................................................609
Loading Content on Demand ...........................................................611 
Caching Common Assemblies ..........................................................615
Virtualizing the User Interface . .................................................................616
Virtualizing the 
ItemsControl ..........................................................617 
Unvirtualizing the ListBox ................................................................619 
Simplifying the DataTemplate...........................................................619
            

Silverlight 4 Unleashed
xvi
Creating Items in Batches. .........................................................................620
Working in Threads ...........................................................................621 
Accelerating the User Interface. .................................................................624
Enabling Hardware Acceleration in the Browser ..............................624 
Enabling Hardware Acceleration Out of the Browser .......................628 
Accelerating with Care . ....................................................................629 
Accelerating in the Windows Phone 7..............................................630
Using a Code Profiler ..................................................................................630 
Avoiding Memory Leaks .............................................................................631
Saving an Object on the Stack or the Heap ......................................631 
Collecting Garbage and Leaking Memory . ......................................632 
Living a Shorter Life . ........................................................................635 
Unregistering Event Handlers . .........................................................635 
Disposing Objects . ............................................................................637 
Using Weak References. ....................................................................637 
Finding a Leak . .................................................................................638
Summary .....................................................................................................639
22  Advanced Development Techniques 
641
Using New C# and .NET Features. .............................................................641
Using Modern Programming Syntax.................................................641 
Creating Extension Methods. ...........................................................645 
Consuming Dynamic Objects . .........................................................646 
Using Named/Optional Parameters. .................................................646
Localizing Applications. .............................................................................647
Adding a Resource File.......................................................................647 
Making an Application Localizable...................................................648 
Using Tools . ......................................................................................651 
Downloading Resource Applications on Demand ............................652
Encrypting and Decrypting . ......................................................................652
Understanding the Encryption/Decryption Mechanism..................652 
Multithreading . ..........................................................................................653
What Is a Thread?..............................................................................653 
Using the ThreadPool........................................................................654 
Dispatching Back to the UI Thread...................................................657 
Creating and Using a 
BackgroundWorker..........................................660 
Locking Critical Resources.................................................................663 
Enhancing Multithreaded Code........................................................666
Unit Testing the Application ......................................................................667
Installing a Unit Test Framework ......................................................668 
Adding Functionality with TDD .......................................................668
            