Silverlight 5深度探索：C#实战指南

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"Pro Silverlight 5 in C# - MacDonald - Apress (2012)" 是一本关于Microsoft Silverlight 5技术的深入教程，专为C#开发者编写。本书由专家MacDonald撰写，旨在帮助读者掌握Silverlight 5的各项核心功能和开发技巧。主要内容包括： 1. **介绍Silverlight**：第一章对Silverlight进行概述，解释其在Web应用开发中的作用，以及它如何提供丰富的用户体验和交互性。 2. **XAML**：第二章深入讲解Extensible Application Markup Language（XAML），它是Silverlight界面设计的主要语言，用于声明式地创建UI元素。 3. **布局管理**：第三章讨论Silverlight中的布局系统，包括各种布局容器（如Grid, StackPanel, Canvas等）的使用。 4. **依赖属性与路由事件**：第四章介绍依赖属性的概念，它是Silverlight中属性绑定和动态更新的基础，同时涵盖了路由事件，允许事件在元素树中传播。 5. **元素与控件**：第五章探讨了基本元素和自定义控件的创建和使用。 6. **应用模型**：第六章讲解Silverlight应用程序的生命周期、启动过程和不同应用类型。 7. **导航**：第七章讨论页面间的导航机制，包括导航框架和历史管理。 8. **形状与变换**：第八章涵盖几何形状和矩阵变换，用于实现图形的动态效果。 9. **画刷、位图与打印**：第九章介绍了填充和描边的画刷，位图的处理，以及如何在Silverlight中实现打印功能。 10. **动画基础**：第十章讲解基础动画，如时间线、关键帧和故事板。 11. **高级动画**：第十一章深入到更复杂的动画技术，如路径动画和数据驱动的动画。 12. **声音、视频与Deep Zoom**：第十二章涵盖了多媒体元素的使用，以及Deep Zoom深度缩放技术，用于创建沉浸式的视觉体验。 13. **Silverlight 3D**：第十三章介绍了Silverlight中的3D支持，如何创建和操作3D对象。 14. **样式与行为**：第十四章讲述了如何使用样式和行为来增强用户界面的一致性和可重用性。 15. **控件模板**：第十五章深入讲解控件模板，允许自定义控件的外观和交互。 16. **多线程**：第十六章探讨了在Silverlight中如何利用多线程来提高应用性能和响应性。 17. **浏览器集成**：第十七章介绍了Silverlight与浏览器的交互，如JavaScript互操作和DOM访问。 18. **离线应用**：第十八章讲解如何创建可以在用户本地运行的离线Silverlight应用程序。 19. **ASP.NET Web服务**：第十九章介绍了如何与ASP.NET Web服务进行通信，实现数据的获取和交换。 20. **数据绑定**：第二十章详细介绍了Silverlight的数据绑定机制，包括双向绑定、数据源和数据转换。 21. **数据控件**：第二十一章涵盖了数据绑定控件，如ListBox, DataGrid等，用于显示和操作数据集。 22. **文件访问**：第二十二章讨论了在Silverlight中读写文件的方法和限制。 23. **网络编程**：第二十三章涵盖了网络通信的基础，包括HTTP请求、WebSocket等。这本书全面覆盖了Silverlight 5的各个方面，无论是初学者还是经验丰富的开发者，都能从中受益，提升在C#环境中使用Silverlight开发高效、交互性强的Web应用的能力。

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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