ASP.NET AJAX编程指南

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"Programming ASP.NET AJAX" 是一本面向已经使用ASP.NET并希望借助Ajax技术提升应用程序体验的开发者，以及对ASP.NET AJAX框架感兴趣的其他技术使用者的书籍。书中主要使用的语言是C#和JavaScript，适合需要避免跨浏览器编程难题的JavaScript程序员。书中可能会涵盖C#和JavaScript的基础知识，以及如何在ASP.NET环境中集成和应用Ajax技术。 ASP AJAX是一种技术栈，它允许开发者创建具有部分页面刷新功能的动态Web应用，从而提高用户体验，减少与服务器的交互次数。ASP.NET AJAX框架是微软提供的一套工具集，用于简化在ASP.NET应用中实现Ajax功能的过程。在"Programming ASP.NET AJAX"这本书中，读者可以期待学习到以下关键知识点： 1. **Ajax基础**：了解Ajax的基本原理，包括XMLHttpRequest对象、异步数据传输和DOM操作。 2. **ASP.NET AJAX库**：熟悉ASP.NET AJAX Control Toolkit，这是一个包含许多预构建Ajax控件和扩展的库，可以快速实现Ajax功能。 3. **C#和JavaScript结合**：学习如何在C#服务器端代码和JavaScript客户端脚本之间进行交互，使用PageMethods、Web Services或UpdatePanels等组件。 4. **ScriptManager组件**：掌握如何使用ScriptManager来管理页面上的Ajax功能，包括加载必要的JavaScript库和注册Ajax事件。 5. **Partial Page Rendering**：理解如何实现页面的部分更新，减少整个页面的刷新，提高响应速度。 6. **AJAX Control Toolkit**：学习使用Toolkit中的控件，如Accordion、AjaxFileUpload、Calendar等，以增强用户界面。 7. **错误处理和调试**：学习如何在Ajax应用中处理错误，并进行有效的调试，包括客户端和服务器端的错误捕获。 8. **跨浏览器兼容性**：探讨如何编写能在多种浏览器环境下工作的JavaScript代码，解决常见的浏览器兼容性问题。 9. **性能优化**：了解如何优化Ajax应用的性能，包括最小化HTTP请求、缓存策略和减少页面重量。 10. **最佳实践**：学习开发Ajax应用的最佳实践，确保代码的可维护性和扩展性。此外，书中的内容可能还会涉及如何与其他微软产品，如SharePoint或Windows Vista集成，以及如何利用O'Reilly提供的其他相关资源，如"Learning ASP.NET 2.0 with AJAX"和"Learning C# 2008"，来进一步提升开发技能。通过阅读本书，开发者将能够充分利用ASP.NET AJAX框架，创建出更高效、用户体验更佳的Web应用程序。同时，O'Reilly的在线资源、会议和Safari Bookshelf提供了丰富的学习材料和社区支持，帮助开发者深入理解和掌握这些技术。

Preface

Appendix A, Debugging ASP.NET AJAX Applications, covers how to find bugs in

ASP.NET AJAX applications and introduces some must-have browser tools.

Appendix B, XMLHttpRequest Reference, lists important methods and properties of

the

XMLHttpRequest object.

Appendix C, DOM Reference, covers important JavaScript DOM methods.

Appendix D, ASP.NET AJAX Reference, lists the most important methods provided

by the ASP.NET AJAX framework.

Appendix E, ScriptManager, UpdatePanel, UpdateProgress, and Timer Declarative

Reference, documents the properties of these four key ASP.NET AJAX server

controls.

What You Need to Use This Book

The examples in this book require only ASP.NET 2.0, which is included in the free

redistributable version of the .NET Framework. However, to make the most of

ASP.NET and ASP.NET AJAX, you should use one of the IDE offerings from

Microsoft. Visual Web Developer 2005 Express Edition (VWD) is free; Visual Stu-

dio 2005 (in its various editions) is the commercial package with more features.

Both are perfectly suited for using the examples in this book.

Conventions Used in This Book

The following typographical conventions are used in this book:

Plain text

Indicates menu titles, menu options, menu buttons, and keyboard accelerators

(such as Alt and Ctrl).

Italic

Indicates new terms, URLs, email addresses, filenames, file extensions, path-

names, directories, and Unix utilities.

Constant width

Indicates commands, options, switches, variables, attributes, keys, functions,

types, classes, namespaces, methods, modules, properties, parameters, values,

objects, events, event handlers, XML tags, HTML tags, macros, the contents of

files, or the output from commands.

Constant width bold

Used to highlight portions of code.

Constant width italic

Shows text that should be replaced with user-supplied values.

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Preface

xvii

For more information about our books, conferences, Resource Centers, and the

O’Reilly Network, see our web site at:

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Safari offers a solution that’s better than e-books. It’s a virtual library that lets you

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Acknowledgments (Programming Atlas)

Working on this book turned out to be an enormous task. The lack of documenta-

tion changes from one release to the next, and complicated JavaScript debugging led

to a lot of trial and error. Although I had worked with ASP.NET and JavaScript for a

very long time, I had to learn Atlas from scratch. Luckily, the Atlas team has been

very supportive and open, especially in the public forums at http://forums.asp.net/

default.aspx?GroupID=34.

I am grateful to the impressive roster of tech editors who helped me shape this book

and provided me with feedback. In alphabetical order by first name, the ones who

saved my reputation in a couple of instances are: Adonis Bitar, Arsen Yeremin,

Bertrand Le Roy, Christoph Wille, Mike Pope, and Tobias Hauser.

Also, I am indebted to my editor, John Osborn, who guided me through this project.

He is the only editor I know who ever complained when I was submitting material

before the negotiated deadline. But it was his excellent project management that

allowed me to focus on writing and staying on—and even going ahead—of schedule.

Finally, I have to admit that I am not too keen on personal acknowledgments, thank-

ing family members, husbands/wives/fiancées/partners, and cats/dogs. (The only

exception is Richard Hundhausen, who once expressed his gratitude that there were

no 24-hour divorce services where he lived.) However, I would like to take this

opportunity to thank my parents. They were very supportive when I wrote my first

book, and now, some 50-odd books later, I finally show some appreciation. Embar-

rassingly, they sometimes even find mistakes without knowing the technologies

involved: some time ago, my father noticed that there were more opening than

closing parentheses in a listing. So, thanks Mom, thanks Dad. And—now that I am

into it—thanks to my friends and family, who do not seem to mind when I have long

writing phases or am on the road for yet another conference.

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