C#深度解析Pro Silverlight 5开发全指南

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《Pro Silverlight 5 in C#》是一本深入指南，专为C#开发者设计，旨在帮助读者掌握Silverlight 5的全面开发技术。该书由Apress出版，特别注重实用性和实用性，提供了丰富的教程和实例，以确保学习者能够快速上手并精通Silverlight 5平台。本书结构严谨，从第1章开始，逐步引领读者进入Silverlight 5的世界。首先，"Introduction"章节概述了Silverlight 5的核心概念和开发环境设置，为后续章节打下基础。接着，"Chapter1: Introducing Silverlight"介绍了Silverlight的架构、主要特点和应用场景。第2章至第23章分别涵盖了关键知识点：XAML（第2章）是用户界面构建的基础，它允许开发者通过声明式编程创建复杂布局和控件；"Layout"（第3章）讨论了布局管理，如何组织UI元素以适应各种屏幕尺寸；"Dependency Properties and Routed Events"（第4章）则涉及了依赖属性和路由事件，这些都是实现控件灵活性和响应性的重要手段。 "Elements"（第5章）详述了基本UI元素如按钮、文本框等的使用，而"Application Model"（第6章）则涵盖了应用程序的生命周期管理和资源管理。接下来的章节依次深入，如"Navigation"（第7章）讲解了页面导航，"Shapes and Transforms"（第8章）探讨图形和变换，"Brushes, Bitmaps, and Printing"（第9章）涉及图像处理和打印支持。动画是Silverlight的一大亮点，"Chapter10: Animation Basics"介绍了基础动画，而"Chapter11: Advanced Animation"则涵盖了更高级的动画技术和技巧。音视频和深度缩放功能在"Chapter12: Sound, Video, and DeepZoom"中有详细讲解，为多媒体应用提供支持。 3D图形在Silverlight 5中有所增强，"Chapter13: Silverlight 3D"涵盖了3D渲染和交互，为游戏和可视化应用打开新可能。"Styles and Behaviors"（第14章）、"Control Templates"（第15章）以及"Multithreading"（第16章）则关注样式管理、行为绑定和并发编程，提高代码的可维护性和性能。 "Chapter17: Browser Integration"探讨了如何与浏览器原生功能集成，"Chapter18: Out-of-Browser Applications"则扩展到离线应用开发，而"Chapter19: ASP.NET Web Services"讲述了如何利用Web服务进行数据交互。最后两章分别围绕数据绑定（"Chapter20: DataBinding"）和数据控件（"Chapter21: DataControls"），以及文件访问（"Chapter22: FileAccess"）和网络通信（"Chapter23: Networking"），展示了Silverlight 5在数据驱动应用中的广泛应用。《Pro Silverlight 5 in C#》是一本内容全面且深入的实战手册，无论你是初学者还是经验丰富的开发者，都能从中收获大量宝贵的知识和实践经验。通过跟随本书的引导，读者将能够熟练地运用C#语言开发出高质量的Silverlight 5应用。

CHAPTER 1  INTRODUCING SILVERLIGHT

(and download a beta) from www.microsoft.com/visualstudio/lightswitch. Or, check out Pro Business

Applications with Silverlight 5 (Apress, 2011), which has a dedicated chapter on the subject.

Visual Studio vs. Expression Blend

If you’re still trying to understand how Visual Studio and Expression Blend stack up, here’s a quick

overview:

• Visual Studio: It has everything you need to develop Silverlight applications, with a

visual designer for Silverlight pages. Using this designer, you can drag, drop, and

draw your user interface into existence (which isn’t always the best idea), and you

can get a live preview of what it looks like (which is terrifically useful).

• Expression Blend: It provides the rich support for creating Silverlight user

interface, with visual tools that surpass Visual Studio. For certain types of user

interface grunt work (for example, creating a nice gradient fill), it’s a tremendous

help. Expression Blend also supports a fun application prototyping tool called

SketchFlow and includes a decent coding editor that’s designed to look like Visual

Studio. However, it lacks many advanced and important development tools, such

as debugging, code refactoring, and project source control.

 Note Visual Studio 2010 includes full support for creating Silverlight 3 projects. But to create Silverlight 5

projects, you need the Silverlight 5 Tools for Visual Studio 2010. And if you plan to use Expression Blend with

Silverlight 5, you’ll (currently) need to use a beta version called the Expression Blend Preview for Silverlight 5. You

can download both tools from the Microsoft Download Center (search for Silverlight 5 at

www.microsoft.com/download).

This book assumes you’re working primarily with Visual Studio. You’ll get occasional tips for

Expression Blend (and other Expression products that work with Silverlight, including the Expression

Design drawing tool and Expression Encoder video encoding tool). But if you really want to master

Expression Blend, you should consider a dedicated book on the subject, spend an afternoon

experimenting, or take a look through Microsoft’s Expression Blend training videos at

http://expression.microsoft.com/cc136535.aspx.

Understanding Silverlight Websites

You can create two types of Silverlight websites in Visual Studio or Expression Blend:

• An ordinary website with HTML pages: In this case, the entry point to your

Silverlight application is a basic HTML file that includes a Silverlight content

region.

CHAPTER 1  INTRODUCING SILVERLIGHT

• ASP.NET website: In this case, Visual Studio creates two projects—one to contain

the Silverlight application files and one to hold the server-side ASP.NET website

that will be deployed alongside your Silverlight files. The entry point to your

Silverlight application can be an ordinary HTML file, or it can be an ASP.NET web

page that includes server-generated content.

So, which approach is best? No matter which option you choose, your Silverlight application will

run the same way—the client browser will receive an HTML document, which will include a Silverlight

content region, and the Silverlight code will run on the local computer, not the web server. However, the

ASP.NET web approach makes it easier to mix ASP.NET and Silverlight content. This is usually a better

approach in the following cases:

• You want to create a website that contains both ASP.NET web pages and

Silverlight-enhanced pages.

• You want to create a Silverlight application that calls a web service, and you want

to design the web service at the same time (and deploy it to the same web server).

• You want to generate Silverlight content indirectly, using specialized ASP.NET

web controls.

On the other hand, if you don’t need to write any server-side code, there’s little point in creating a

full-fledged ASP.NET website. Many of the Silverlight applications you’ll see in this book use basic

HTML-only websites. The examples only include ASP.NET websites when they need specific server-side

features. For example, the examples in Chapter 20 use an ASP.NET website that includes a web service.

This web service allows the Silverlight application to retrieve data from a database on the web server, a

feat that would be impossible without server-side code. You’ll learn how to design an ASP.NET web

service for Silverlight in Chapter 19.

ADDING SILVERLIGHT CONTENT TO AN EXISTING WEBSITE

A key point to keep in mind when considering the Silverlight development model is that in many cases

you’ll use Silverlight to augment the existing content of your website, which will still include generous

amounts of HTML, CSS, and JavaScript. For example, you might add a Silverlight content region that

shows an advertisement or allows an enhanced experience for a portion of a website (such as playing a

game, completing a survey, interacting with a product, or taking a virtual tour). You may use Silverlight-

enhanced pages to present content that’s already available in your website in a more engaging way or to

provide a value-added feature for users who have the Silverlight plug-in.

Of course, it’s also possible to create a Silverlight-only website, which is a somewhat more daring

approach. The key drawback is that Silverlight isn’t installed as widely as other web technologies such as

Flash, and doesn’t support legacy clients such as those running the Windows ME or Windows 2000

operating system. As a result, Silverlight doesn’t have nearly the same reach as ordinary HTML. Many

businesses that are adopting Silverlight are using it to distinguish themselves from other online

competitors with cutting-edge content, but they aren’t abandoning their traditional websites.

CHAPTER 1  INTRODUCING SILVERLIGHT

• App.xaml and App.xaml.cs: These files configure your Silverlight application. They

allow you to define resources that will be made available to all the pages in your

application (see Chapter 2), and they allow you react to application events such as

startup, shutdown, and error conditions (see Chapter 6). In a newly generated

project, the startup code in the App.xaml.cs file specifies that your application

should begin by showing MainPage.xaml.

• MainPage.xaml: This file defines the user interface (the collection of controls,

images, and text) that will be shown for your first page. Technically, Silverlight

pages are user controls—custom classes that derive from UserControl. A Silverlight

application can contain as many pages as you need—to add more, simply choose

Project

 Add New Item, pick the Silverlight User Control template, choose a file

name, and click Add.

• MainPage.xaml.cs: This file includes the code that underpins your first page,

including the event handlers that react to user actions.

 Note For the first few chapters of this book, you’ll create applications that have just a single page. In Chapter 6,

you’ll take a closer look at the application logic that sets your initial page. In Chapter 7, you’ll break free of this

constraint altogether and learn the techniques you need to combine pages and navigate from one to another.

Along with these four essential files, there are a few more ingredients that you’ll find only if you dig

around. Under the Properties node in the Solution Explorer, you’ll find a file named AppManifest.xml,

which lists the assemblies that your application uses. You’ll also find a file named AssemblyInfo.cs,

which contains information about your project (such as its name, version, and publisher) that’s

embedded into your Silverlight assembly when it’s compiled. Neither of these files should be edited by

hand—instead, they’re modified by Visual Studio when you add references or set project properties.

Last, the gateway to your Silverlight application is an automatically generated but hidden HTML test

page named ProjectNameTestPage.html. So if your project is SilverlightApplication1, that page is named

SilverlightApplication1TestPage.html (see Figure 1-3). To see this file, make sure you’ve compiled your

application at least once. Then, click the Show All Files button at the top of the Solution Explorer, and

expand the Bin\Debug folder (which is where your application is compiled). The test page file includes

an <object> element that creates the Silverlight content area. You’ll take a closer look at it later in this

chapter.

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