利用Ext.NET构建富互联网应用指南

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Ext.NET Web Application Development 是一本专注于使用 Ext.NET 进行富互联网应用程序（RIA）开发的指南。该书面向那些希望利用 ASP.NET Web Forms 和 ASP.NET MVC 架构进行 Web 应用程序构建的专业开发者。作者 Anup Shah 以其在 BIRMINGHAM-MUMBAI 地区的经验，向读者传授如何利用 Ext.NET 的强大功能和组件库，创建高效、交互性和用户体验卓越的应用。书中深入讲解了 Ext.NET 开发的基本概念，包括但不限于数据绑定、事件处理、布局管理、组件定制以及与服务器端数据交互的最佳实践。对于 ASP.NET 开发者来说，它是一本极具价值的参考资料，因为书中不仅涵盖了C#语言的应用，还提供了实际项目的案例分析和解决方案。通过阅读本书，开发者将学习如何： 1. 理解 Ext.NET 的架构：了解 Ext.NET 如何集成到 ASP.NET 环境中，以及如何利用其 MVC 模式进行应用程序组织。 2. 构建用户界面：掌握如何设计响应式和可定制的界面元素，以及如何使用 Ext.NET 的组件库来创建动态交互体验。 3. 数据绑定和数据操作：学会如何连接到数据源，如数据库或Web服务，并实现双向数据绑定，保持数据的一致性。 4. 服务器端编程：理解如何在 ASP.NET 中调用 Ext.NET API，处理AJAX请求，以及处理服务器端验证和逻辑。 5. 跨平台兼容性：认识Ext.NET 的兼容性特点，确保应用能够在多种浏览器和设备上流畅运行。版权信息表明，这本书享有2012年 Packt Publishing 出版的版权，所有内容未经许可不得复制或传播。尽管作者和出版社已尽力保证信息的准确性，但书中的信息不带任何保修，且不对因使用本书造成的直接或间接损害负责。Packt Publishing 在提及商标时已尽力正确使用大写字母，但并不能保证其准确性。 "Ext.NET Web Application Development" 是一本实用的开发教程，旨在帮助开发者提升他们的 Web 应用开发技能，特别是在使用 Ext.NET 和 ASP.NET 技术栈时。无论你是初学者还是经验丰富的开发者，都能从中受益匪浅，提高开发高质量RIA应用的能力。

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Table of Contents

[ vii ]

What else can you do with TreePanels? 297

TabPanel 298

TabPanel – overview 298

Asynchronous tab loading 301

Useful tab features 302

Tabs rendered at the bottom 303

Plain tabs 303

TabScrollerMenu plugin 303

Tab menus 304

Using TabBar to add custom toolbar items 307

More TabPanel examples 308

Summary 309

Extending Ext.NET – Custom Controls and Plugins 311

Basic control builder 312

Example 312

Benets of this approach 316

Drawbacks to this approach 316

Extending Ext.NET controls 316

Extending the Ext.NET class 316

Extending the Ext JS class 318

Embedding the resources 321

Declaring your embedded web resources 322

Adding your embedded resources to your Ext.NET component 322

Custom events 323

Dening the event in the JavaScript class 324

Dening the client-side event on the server side 324

Creating a custom DirectEvent 329

Passing properties to your JavaScript class 332

Using the custom component on an ASP.NET Web Form 333

Using your custom component in ASP.NET MVC (Razor) 334

A basic control renderer 335

Reusing Ext.NET's builder pattern for a richer custom MVC framework for

your own application 336

Recap of steps to create a custom component 341

Scenario 1 – simple subclass, no custom events, no custom JavaScript or CSS 343

Scenario 2 – simple subclass, no custom events, but with custom JavaScript or CSS 343

Scenario 3 – subclass with custom Listeners and/or DirectEvents, and custom

JavaScript/CSS 343

Component design considerations 344

Building more complex controls through composition 344

GenericComponent<T> – a quick alternative to wrap Ext JS ready Components 345

Declaring DirectMethods on custom components 345

Supporting ASP.NET Web Forms IPostBackDataHandler 345

Preface

[ 2 ]

Chapter 4, AJAX with Ext.NET, looks at the powerful AJAX options Ext.NET

supports. We cover the powerful DirectEvents and DirectMethods features, as well

as AJAX options specic to certain controls. This is a powerful chapter that lays the

foundation for slick and usable applications that are responsive to user interactions.

Chapter 5, Working with Data, looks at the powerful data handling techniques

available in Ext.NET. We cover XTemplates, which allows you to dene HTML

templates to bind data to, and we explain the Stores, Models, and Proxies

architecture that allows for powerful data-binding reuse across many Ext.NET

components. The ComboBox and DataView are introduced as examples of controls

that reuse this architecture.

Chapter 6, Introducing GridPanels, covers the popular and highly sophisticated

GridPanel control. It is another control that reuses the Stores, Models, and Proxies

architecture, but is given its own chapter. We look at various features of the

GridPanel such as paging, ltering, sorting, grouping, column summaries, row

expanding, and selection models. We also look at how grid editing can be enabled,

including in-line grid editing at the row or cell level. As large as this chapter is, there

are many other GridPanel capabilities that we have not been able to t into this book,

so many links to further examples and resources are also provided.

Chapter 7, Forms and Validation, looks at the numerous form controls available in Ext.

NET, how to lay them out, and how to enable client and remote validation. We also

look at how custom validators can be created. Lastly, we also see how Ext.NET's

data-binding capabilities can also be reused with forms.

Chapter 8, Trees and Tabs with Ext.NET, introduces the popular TreePanel and

TabPanel controls. Due to limited space in the book, we cannot cover all the

sophisticated possibilities that these controls offer, but we do provide an overview

of how tree nodes can be loaded asynchronously and how to reuse the Store,

Models, and Proxies architecture to bind data to trees. We also look at various ways

TabPanels can be congured, including how to load content on-demand using

various AJAX techniques supported by Ext.NET.

Chapter 9, Extending Ext.NET Controls – Custom Controls and Plugins, is perhaps the

most powerful chapter in this book. It shows you how to extend Ext.NET controls

in a variety of ways to support both ASP.NET Web Forms and ASP.NET MVC

Razor templates, enabling you to create highly reusable components. Most of the

chapter looks at how controls can be extended, but we also look at how you can

use the available plugin mechanisms to reuse functionality across different types

of components.

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