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Ext.NET Web Application Development
Ext.NET Web Application Development

Ext.NET Web Application Development: If you're looking to build .NET based rich internet applications, look no further. This is the ideal primer that takes you step by step through the practical aspects of combining Ext.NET and Ext JS, and much more.

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Ext.NET Web Application Development

Chapter 2. Ext.NET Controls Overview

Ext.NET provides a rich and vast set of UI controls that extends the already versatile set provided by Ext JS. Given the extensiveness of the set of controls, it won't be possible to cover them all in detail in this book. Instead, in this chapter we look at some of the more basic—but still powerful—controls, such as buttons, toolbars, menus, panels, and more. This will help to introduce Ext.NET syntax and conventions, showing how the server side and the client side (JavaScript) can integrate together. Subsequent chapters will explore more complex controls, such as various layout controls and more advanced controls like grids and trees. At the end of this chapter, you will also get a glimpse of some complex controls that we will not be able to cover in this book, just so you get an idea of the possibilities that Ext.NET offers.

By the end of this chapter you will understand:

  • The type of controls in Ext.NET

  • Common features of most controls

  • Handling events on...

Control overview


Ext.NET provides a vast array of controls. We can broadly group the controls by their main functionality as follows:

Functionality Area

Examples

Data visualization

DataView, GridPanel, PropertyGrid, TreePanel, Chart, and Calendar

Data handling

Store, Proxies, Model, Reader/Writer, and Associations

Containers

Container, Panel, Window, ButtonGroup, Toolbar, ViewPort, TabPanel, and Menu

Special containers

Desktop and Portal

Control elements

Various types of buttons (such as Button, SplitButton, and LinkButton), pickers (such as ColorPicker and DatePicker), Slider, ProgressBar, Image, and Editor

Layouts

Accordion, Anchor, Border, HBox, VBox, and many more

Form and fields

FormPanel, FieldContainer, TextField, NumberField, ComboBox, CheckBoxField, DateField, DropdownField, FileUploadField, HyperLink, Label, MultiSelect, SpinnerField, TimeField, TriggerField, and many more

Utilities and helpers

DragDrop, KeyMap, KeyNav, XTemplate, TaskManager, Selection...

Buttons


A number of Ext.NET features and capabilities will be introduced alongside these seemingly simple components. Examples of features that are common to many components include:

  • Setting icons

  • Client-side (JavaScript) event handlers

  • Server-side (via DirectEvents) event handlers

There are many others, and these will be introduced in the following examples. AJAX event handling will also be covered in its own chapter later, but you will get a taste of it here.

A simple button

If you are using regular HTML, you can create buttons using either the <button> element or the <input type="button"> element (or you can create your own that behaves like buttons, though for accessibility and other reasons that is often not advised). These buttons are functional and work, and are crucial to many websites.

Desktop applications on the other hand, have many variations of buttons, such as SplitButtons, MenuButtons, and more. Ext JS, being a rich application framework, therefore offers similarly versatile...

Events in Ext.NET


Ext.NET supports a number of different event mechanisms. For example, there are client-side events, AJAX events, and general publish/subscribe event patterns that are available. Different controls in Ext.NET support different types of events. Buttons, LinkButtons, and similar controls will support a click event when the control is clicked. Other specialized controls will have more events. For example, most container controls have events related to when items are added or removed from a container, and so on. We will continue using the Button control to demonstrate how you can subscribe to and handle events.

Listeners – client-side events

Ext JS provides a vast event-handling framework for its components, which Ext.NET exposes quite elegantly. Ext JS lets you subscribe to an event through the use of listeners. So, here is an example of a simple click handler for a button:

<ext:Button runat="server" Text="Click Me!">
  <Listeners>
    <Click Handler="alert(...

Container components


Container components allow you to add other components (and containers) to it. Container components can also be configured with a layout to help control how its items are presented, which will be covered in the next chapter, dedicated to layouts. In this chapter, we will look at some core examples, such as the Container, Toolbar, Panel, and Window. Tooltips are also containers, so we will have a quick look at that. Other chapters will cover the popular and powerful GridPanel, TreePanel, and TabPanel.

Container

A Container is the most basic of, well, Containers! It simply acts as a lightweight container without any fancy or sophisticated options compared to its various subclasses, such as Toolbar, Panel, Window, Tooltip, and more. The Container is often used in conjunction with a layout, which we will look at in the next chapter.

Toolbars and menus

The button examples showed a number of features of Ext.NET. Toolbars and menus are additional controls that may feature...

Complex components


Ext.NET is incredibly vast, and this book is constrained such that many controls cannot be described in detail here. While later chapters look at important, popular, and common controls, such as GridPanel, DataView, XTemplate, TreePanel, TabPanel, and various form controls, it is worth bearing in mind that there are many other rich controls that cannot be covered here simply due to lack of space. However, it is highly recommended to spend time browsing the Examples Explorer at http://examples.ext.net. But to just give you a hint of some of the possibilities, consider these sophisticated component:

Desktop

This is an example of how many Ext.NET components can all come together to provide a powerful desktop-like effect. Components such as Windows and Toolbars play an important part when put together like this!

If your application is complex enough, you may consider creating a desktop within your browser! You can put this kind of look and feel together through the use of...

Even more!


Ext.NET provides many utilities as well, from utility classes to helper controls, such as progress bars, task managers, keyboard handlers, and more. These can be seen in the Examples Explorer: http://examples.ext.net.

Summary


In this chapter, we saw that although components can be building blocks, such as buttons and various form controls, we can also have Container components which additionally have the ability to contain other components and provide layout capabilities.

Using the humble Button various features common to many components were introduced, such as the ability to set icons, and add menus. Variations of the Button, such as SplitButtons, were also covered. We also saw common features, such as event handling and setting custom configuration properties on various controls.

Container controls were also introduced. These are more sophisticated, being able to contain yet other controls. The toolbars showed that many controls, not just menus and buttons, can be contained. Panels, Windows, and Tooltips were also introduced as other variations of container controls to demonstrate some important building blocks for applications.

Some initial AJAX capabilities were described, but a lot more will be covered...

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Key benefits

  • Build rich internet applications using the power of Ext.NET controls
  • Learn how Ext.NET leverages Sencha's popular Ext JS JavaScript framework to provide a full client-server web development experience
  • Full of examples and tips, with clear step-by-step instructions

Description

To build a rich internet application, you need to integrate a powerful client side JavaScript framework with a server side framework. Ext.NET achieves this by integrating Sencha's Ext JS framework with the power of ASP.NET. The result ñ a sophisticated framework offering a vast array of controls, layout, and powerful AJAX and server bindings, which can be used to build rich, highly usable web applications. "Ext.NET Web Application Development" shows you how to build rich applications using Ext.NET. Examples guide you through Ext.NET's various components using both ASP.NET Web Forms and MVC examples. You will also see how Ext.NET handles data binding and server integration. You will also learn how to create reusable components and put them together in great looking applications. This book guides you through the various Ext.NET components and capabilities to enable you to create highly usable Ext.NET components and web applications. You will learn about various UI components and numerous layout options through examples. You will see how the AJAX architecture enables you to create powerful data-oriented applications easily. This book will also teach you how to create reusable custom components to suit your needs. "Ext.NET Web Application Development" shows you how to create rich and usable applications using Ext.NET through numerous examples.

Who is this book for?

This book is written for .NET Web Application Developers who are familiar with ASP.NET looking to build .NET based Rich Internet Applications. Whether you are new to Ext JS or you are looking to use your existing Ext JS skills in a .NET environment, this book will be useful for you.

What you will learn

  • Understand how Ext.NET and Ext JS fit together to help create applications with seamless server side integration
  • Learn how to organize controls and layouts to create highly interactive UIs with the richness of desktop-like applications
  • Understand the different AJAX options available to interact with the server and choose the techniques that suit your needs
  • Know the various options to represent and model data, locally or remotely, and reuse them where needed
  • Learn how to build sophisticated grids, trees, and other AJAX-based components that interact with the server efficiently
  • Gain confidence in extending components and creating plugins for reusability and maintainability
  • Create user-friendly forms with rich and custom client and server side validation
  • Learn how to troubleshoot your applications
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Table of Contents

10 Chapters
Getting Started with Ext.NET Chevron down icon Chevron up icon
Ext.NET Controls Overview Chevron down icon Chevron up icon
Layout with Ext.NET Chevron down icon Chevron up icon
AJAX with Ext.NET Chevron down icon Chevron up icon
Working with Data Chevron down icon Chevron up icon
Introducing GridPanels Chevron down icon Chevron up icon
Forms and Validation Chevron down icon Chevron up icon
Trees and Tabs with Ext.NET Chevron down icon Chevron up icon
Extending Ext.NET – Custom Controls and Plugins Chevron down icon Chevron up icon
Troubleshooting and Debugging Chevron down icon Chevron up icon

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Simon Ahammer Mar 29, 2013
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Im Rahmen eines neuen Intranetprojekts bin ich auf ExtJs und Ext.net gestossen und habe mir für Letzteres dieses Buch gekauft, da die Onlinedokumentation des Herstellers von Ext.NET vor allem für die MVC-Variante doch ziemlich "dünn" ist.Wer Ext.NET zusammen mit dem klassischen ASP.NET verwendet, findet in diesem Buch viele nützliche Umsetzungsungsbeispiele und Hinweise, leider sind jedoch für die wenigsten Codebeispiele die entsprechende ASP.NET MVC Implementierungen abgedruckt. Da sich bei vielen Einsatzszenarien von EXT.NET die Codierung mittels ASP.NET MVC jedoch erheblich von ASP.NET Webforms unterscheidet, musste ich mir (zu) häufig den MVC - Code "zusammengoggeln".Für einen Einstieg in EXT.NET (vor allem mit Webforms) ist dieses Buch jedoch aus meiner Sicht -zusammen mit der Onlinedokumentation- gut geeignet.
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