ASP.NET AJAX 2012深度解析

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"asp.net ajax in Action 2012" 是一本由Manning出版社出版的专业书籍，由Jeffrey Palermo、Ben Scheirman和Jimmy Bogard合著，专门探讨ASP.NET AJAX技术。这本书的前言由Phil Haack撰写，是ASP.NET MVC系列的一部分，同时也涉及了如MVC贡献、NHibernate等其他相关技术。 ASP.NET AJAX是微软提供的一个用于构建富客户端Web应用的框架，它允许开发者在不刷新整个页面的情况下更新部分网页内容，从而提升用户体验。这本书深入介绍了如何利用ASP.NET AJAX进行异步编程，包括控件、服务端脚本、客户端脚本以及与服务器的交互等核心概念。书中可能涵盖了以下关键知识点： 1. **ASP.NET AJAX基础知识**：讲解了如何集成ASP.NET AJAX到现有的ASP.NET项目中，以及如何使用UpdatePanel、ScriptManager等关键组件来实现局部页面更新。 2. **异步处理**：深入探讨了如何通过AJAX调用Web服务或Page Methods实现后台处理，并实时更新客户端视图。 3. **JavaScript和jQuery**：由于ASP.NET AJAX大量依赖JavaScript，书中可能会详细介绍如何使用jQuery和其他JavaScript库来增强用户体验。 4. **数据绑定**：可能涉及如何使用ASP.NET AJAX控件与服务器数据源进行交互，如ListView、DataPager等，以及如何实现动态数据绑定。 5. **自定义控件和扩展**：讨论创建自定义服务器控件和客户端脚本组件，以适应特定业务需求。 6. **性能优化**：讲述如何通过优化AJAX请求、压缩资源和缓存策略来提高应用性能。 7. **MVC框架结合**：书中提及ASP.NET MVC，意味着会讨论如何将ASP.NET AJAX技术与MVC模式相结合，实现更灵活的架构设计。 8. **MVCCONTRIB和NHibernate**：MVCCONTRIB可能是指ASP.NET MVC的社区贡献项目，而NHibernate是一个流行的对象关系映射（ORM）框架，书中的这部分可能会介绍如何将这些工具与ASP.NET AJAX一起使用，以实现更高效的数据管理。 9. **最佳实践和实战案例**：作者们通过实际项目经验分享最佳实践，提供具体示例代码和问题解决策略，帮助读者更好地理解和应用所学知识。 "asp.net ajax in Action 2012" 是一本全面且深入的指南，适合想要提升ASP.NET AJAX技术能力的开发者阅读，特别是那些对ASP.NET MVC和相关生态有兴趣的开发者。书中丰富的实例和实践经验将有助于读者将理论知识转化为实际开发技能。

preface

My career started in the mid-nineties as one of the early web developers. Web as in

HTTP, that is. Netscape Navigator was helping to grow the number of households with

internet modems because it was more advanced than anything else at the time.

Netscape Navigator 3.0 (1996) and 3.04 (1997) helped households and businesses all

over the world open up the internet for common uses. There is no more common a

task than shopping! With the advent of ecommerce, the internet exploded with a cap-

italist gold run.

I started web development in the public sector where we leveraged the first threads

of social networking by allowing school district graduates to collaborate with former

classmates. I started my career on the Microsoft platform using

IDC (Internet Database

Connector) with

HTX (HTML Extension Template). Internet Information Services (IIS) 2.0

gave us fantastic flexibility using

ODBC data sources. This was my first use of the “code

nugget,” or <% %> delimiters.

IDC/HTX gave way to Active Server Pages (ASP), and I

can still recall following the changes as they broke–

ASP 2.0 to ASP 3.0 as well as the awe-

some

COM+ integration. I dabbled in CGI, Perl, Java, and C++, but stayed with the

Microsoft platform. Observing the Visual Basic explosion from the sidelines, I learned

the ropes with small utility apps.

Active Server Pages 3.0 saw the browser wars with Internet Explorer 4, released

with Windows 95, competing with Netscape for market share. Writing web applica-

tions that worked well with both browsers was difficult.

IE 5.0 opened the horizons for

intranet applications with proprietary web extensions like the

XML data island and

better scripting capabilities. Windows

XP shipped with IE 6, which effortlessly cap-

tured the majority of the web browser market.

ASP 3.0 put the programmer intimately

Licensed to Gayle M. Noll <pedbro@gmail.com>

PREFACE

xvi

in touch with HTTP, HTML, and the GET and POST verbs. I remember pulling out

crude frameworks to handle multiple request paths from the same

ASP script.

At the same time

ASP 3.0 was enjoying widespread adoption, Struts was taking the

Java web application world by storm. Struts is probably the best known Java

MVC frame-

work, although today there are many popular frameworks for the

JVM. With ASP 3.0, I

was unaware of the lessons my Java counterparts had already learned, although I felt the

pain of myriad responsibilities lumped into a single

ASP script.

I adopted

ASP.NET 1.0 right out of the gate and converted some of my ASP 3.0 sites

to Web Forms. Remember when GridLayout was the default with

CSS absolute posi-

tioning everywhere? It was clear that Web Forms 1.0 was geared for

VB6 developers

coming over to .

NET and getting onto the web. The post-backs and button click han-

dlers were largely foreign to me, but my colleagues who were seasoned VB6ers felt

right at home.

ASP.NET 1.1 dropped the GridLayout and forced the developer to

understand

HTML and how flow layout works. Down-level rendering was great when

Internet Explorer was the “preferred” browser, and everything else was downlevel. That

paradigm started to break down as Firefox climbed in market share and demanded

standards-compliant markup.

I became an

ASP.NET expert and was a frequent blogger during the .NET 2.0 beta

cycle. I knew every feature and every breaking change from

ASP.NET 1.1 to 2.0, and

helped my team adopt 2.0. During the

ASP.NET 2.0 era, I started following Martin

Fowler and his Model-View-Presenter writings. I implemented that pattern to pull away

logic from the code-behind file, which had become bloated. Java developers, in 2005,

were enjoying a choice of several

MVC frameworks for the web. I, on the other hand, was

wrestling Web Forms into Model-View-Presenter and test-driven development submis-

sion. It was exhausting, but what was the alternative?

In 2006, with a job change, I jumped over to software management and smart client

development with WinForms. With the familiar clunkiness of the code-behind model,

and a development team to manage, I implemented the Model-View-Controller pattern

with the WinForm class as the view. It was a breath of fresh air. UI development was

seamless, and the controllers were a natural boundary from the domain model to the

UI. In 2007, I jumped back into web development and begrudgingly implemented

Model-View-Presenter with Web Forms again. In retrospect, I wish I had adopted Mono-

Rail, another Model-View-Controller framework for .

NET.

In February 2007, Scott Guthrie (ScottGu) created a prototype of what would

become the

ASP.NET MVC framework. He had heard from many customers about the

difficulties with Web Forms and how they needed a simpler, more flexible way to write

web applications. At the 2007

MVP Summit, Scott sought input from a small group of

Microsoft

MVPs. Darrell Norton, Scott Bellware, Jeremy Miller, and I validated the vision

of his prototype and gave initial input that would end up coded into the framework.

When Scott Guthrie presented, to an audience in Austin, Texas, a working proto-

type and vision for

ASP.NET MVC at the AltNetConf open spaces conference in Octo-

ber 2007, I knew instantly that this is what I’d wished for all along. As a long-time web

developer, I understood

HTTP and HTML, and this, I believe, is what ASP.NET 1.0

should have been. It would have been such a smooth transition from

ASP 3.0 to

Licensed to Gayle M. Noll <pedbro@gmail.com>

PREFACE

xvii

ASP.NET MVC

. I can claim the first ASP.NET MVC application in production because I

convinced Scott to give me a copy of his prototype and revised my www.partywithpal-

ermo.com registration site, launching it in November 2007 on one of Rod Paddock’s

servers at DashPoint.

What Microsoft did with the

ASP.NET MVC release cycle was an unprecedented

project in the Developer Division. The project was released at least quarterly on the

CodePlex site, source code and all. It was also developed using test-driven develop-

ment as the software construction technique. Full unit test coverage is included in the

source code download, and

ASP.NET MVC 1.0 was released under the MS-PL, and OSI-

approved open source license.

ASP.NET MVC works the way the web works; it’s a natural fit. Although Microsoft is

last to the table with a Model-View-Controller framework for its development plat-

form, this framework is a strong player. Its design focuses on the core abstractions

first. It is conducive to extension by the community. In fact, the same week the first

Community Technology Preview (

CTP) was released, Eric Hexter and I launched the

MvcContrib open-source project with an initial offering of extensions that integrated

with the

ASP.NET MVC Framework.

At the time of publishing this book, the

ASP.NET MVC framework is a frequently

used tool at Headspring Systems, where I facilitate the consulting practice. For the

NET industry as a whole, I predict that ASP.NET MVC will be considered the norm for

ASP.NET development by 2011.

New developers are coming to the .

NET platform every day, and for web develop-

ers,

ASP.NET MVC is easy to adopt and learn. Because of the decreased complexity, the

barrier to adoption is lowered, and because of the simplicity, it can grow to meet the

demands of some of the most complex enterprise systems.

When Manning Publications approached me to write a book on

ASP.NET MVC, I

was already a frequent blogger on the topic and had published an article on the

framework in CoDe magazine. Even so, I knew writing a book would be a tremendous

challenge. This book has been in progress for over a year, and I am excited to see it

published. I learned quite a bit from Ben and Jimmy throughout this project, and I

learned so much more about the framework by writing about it. This knowledge has

direct and immediate benefit to our client projects.

Our hope is that our book will stay with you even after you have written your first

application. Writing a book published just after a 1.0 release is challenging because

many things are discovered after a technology has been out in the wild. Leveraging it

on client projects immediately has definitely helped increase the quality of informa-

tion contained in the book because it is derived from hands-on experience.

Although other platforms have benefited from Model-View-Controller frameworks

for many years, the

MVC pattern is still foreign to many .NET developers. This book

explains how and when to use the framework; also the theory and principles behind

the pattern as well as complimentary patterns. We hope that this book will enlighten

your understanding of an indispensable technology that’s simple to learn.

EFFREY PALERMO

Licensed to Gayle M. Noll <pedbro@gmail.com>

ACKNOWLEDGMENTS

xix

the book would not be as good as we hope it is. Our sincere thanks goes to Phil Haack

for reviewing the manuscript and writing a brilliant foreword. Many thanks should

also go to Freedom Dumlao, who painstakingly reviewed each chapter to ensure the

message would apply in the best manner to the target audience. Jeremy Skinner was

also a boon to the project. Jeremy tested and retested every code listing and code sam-

ple in the book as well as in the many Visual Studio projects that come with the book.

His attention to detail, backed up by his vast experience with

ASP.NET MVC and Mvc-

Contrib, has contributed greatly to this book.

Manning invited the following reviewers to read the manuscript at different stages

of development and to send their comments: Mark Monster, Andrew Siemer, Benja-

min Day, Frank Wang, Derek Jackson, Tim Binkley-Jones, Marc Gravell, Alessandro

Gallo, Josh Heyer, Peter Johnson, Jeremy Anderson, and Alex Thissen.

This book has also benefited from outside technical reviewers who volunteered to

read parts of the manuscript and provided feedback: Rod Paddock, Craig Shoemaker,

Hamilton Verissimo, Matt Hinze, Kevin Hurwitz, Blake Caraway, Nick Becker, Mahen-

dra Mavani, Eric Anderson, Rafael Torres, Eric Hexter, Tom Jaeschke, Matt Hawley,

and Sebastien Lambla.

Before this book went to print, a large number of people purchased the

PDF edi-

tion of the book by participating in the

MEAP, Manning’s Early Access Program. We

would like to thank those readers for their comments and participation early, and

throughout the manuscript portion of the project, especially Eric Kinateder, Ben

Mills, Peter Kellner, Jeff P., Orlando Agostinho, Liam McLennan, Ronald Wildenberg,

Max Fraser, Gudmundur.Hreidarsson, Kyle Szklenski, Philippe Vialatte, Lars Zeb,

Marc Gravell, Cody Skidmore, Mark Fowler, Joey Beninghove, Shadi Mari, Simone

Chiaretta, Jay Smith, Jeff Kwak, and Mohammad Azam.

JEFFREY PALERMO

I would like to thank my beautiful wife, Liana, for her support and patience through-

out this project. Liana gave birth to our daughter, Gwyneth Rose, shortly before the

book was started, and the motivation to spend more time with my growing family

pushed me to complete the book. Thanks also to my parents, Peter and Rosemary Pal-

ermo, for instilling in me a love of books and learning from an early age.

BEN SCHEIRMAN

My thanks and utmost appreciation go out to my amazing wife, Silvia. Her continued

support and encouragement of my extracurricular work led to writing this book in the

first place. I would also like to recognize one of my university mentors, Venkat Subra-

maniam. With his guidance, I found my passion in software development and strived

to learn more and push the envelope. He was an inspiration in my career. Finally I’d

like to thank my wonderful children, Andréa, Noah, and Ethan (and most recently

Isaac and Isabella), who showed immense patience and encouragement while their

dad was banging away at the keyboard in the late hours of the night.

Licensed to Gayle M. Noll <pedbro@gmail.com>

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