Ext.NET Web应用开发指南

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"这是一本由Anup Shah编著的关于Ext.NET Web应用程序开发的教程，主要介绍了如何使用Ext.NET结合ASP.NET WebForms和ASP.NET MVC构建富互联网应用。该书适用于有一定英语基础的学习者，旨在帮助他们掌握Ext.NET的相关技术和实践方法。" 在《Ext.NET Web应用程序开发教程》中，作者Anup Shah深入浅出地讲解了如何利用Ext.NET这个强大的JavaScript框架，结合微软的ASP.NET技术（包括WebForms和MVC模式）来创建功能丰富的Web应用。这本书不仅适合初学者，也对有经验的开发者具有参考价值。首先，书中详细介绍了Ext.NET的基础知识，包括控件、布局、数据绑定和事件处理等核心概念。Ext.NET提供了大量的UI组件，如表格、面板、菜单、表单等，这些组件的使用方法在书中都有详尽的阐述，帮助读者快速构建用户界面。此外，书中还涵盖了数据源的配置和数据绑定，这对于实时更新和交互性的实现至关重要。其次，针对ASP.NET WebForms和ASP.NET MVC这两种不同的开发模式，书中分别提供了相应的集成指导。WebForms模式以其直观的事件驱动模型深受开发者喜爱，而MVC模式则强调分层架构和可测试性。通过Ext.NET，开发者可以在这两种模式下自由切换，以满足不同项目的需求。此外，书中还会讲解如何使用Ext.NET的扩展功能，如图表、网格、树形视图等，以及如何利用Ajax进行异步通信，提升应用的响应速度。对于那些希望提升用户体验的开发者来说，这些内容非常实用。在实际开发中，错误处理和性能优化也是必不可少的部分。本书可能也会涵盖调试技巧、性能分析和最佳实践，帮助读者解决可能出现的问题，并优化应用性能。最后，尽管书中提到所有信息力求准确，但毕竟技术日新月异，因此作者和出版商不承担任何因使用本书内容导致的直接或间接损失。读者在实践中仍需结合最新的技术文档和社区资源进行学习和验证。《Ext.NET Web应用程序开发教程》是一本全面介绍如何使用Ext.NET开发高效、用户友好的Web应用的书籍，对于想要提升自己在ASP.NET环境下的前端开发技能的人来说，是一份宝贵的资源。

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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