经常关注我的Blog的朋友可能注意到了，在我Blog的左边系列文章中，已经移除了对Atlas学习手记系列文章的推荐，因为随着ASP.NET AJAX 1.0 Beta版的发布，它们已经不再适用，为了不继续误导广大朋友，所以不再作为推荐系列文章，如果有需要参考的朋友，可以直接到随笔分类中查看。
ASP.NET AJAX Beta
改动如此之大，鉴于又没有很好的中文参考资料，所以决定最近开始写作ASP.NET AJAX入门系列，这个系列我会把ASP.NET AJAX当作一个全新的东西去对待，不再考虑以前的Atlas，把自己对ASP.NET AJAX的研究与大家分享，便于初学的朋友少走一些弯路。对Atlas熟悉的朋友可以推荐看Dflying Chen的《拥抱变化——从Atlas到ASP.NET AJAX系列》，以及老赵的《深入Atlas系列》。由于个人的能力和掌握的程度有限 ，难免出现错误和遗漏的地方，还请大家多多理解和指正。
OK
，让我们从这里开始！
一．ASP.NET AJAX组成部分
在ASP.NET AJAX官方网站上有如下三个下载：
1
．ASP.NET AJAX：这部分是ASP.NET AJAX的核心部分，包括了核心AJAX类型系统，网络协议层(networking stack)，组件模型，扩展器(extender)基类，以及与ASP.NET集成的服务器端功能(包括广受欢迎的ScriptManager，UpdatePanel，和 Timer控件)。功能列表如下：
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服务端功能列表
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Asynchronous client-to-server networking
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Authentication as a Web service
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ControlExtender class
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Profile as a Web service
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ScriptManager and ScriptManagerProxy controls
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Static page methods as Web services
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Timer control
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UpdatePanel control
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UpdateProgress control
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客户端功能列表
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Authentication for JavaScript
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Behavior class
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Calling .asmx Web services from JavaScript
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Component class
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Control class
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Debug class
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JavaScript Array type extensions
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JavaScript Boolean type extensions
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JavaScript Error type extensions
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JavaScript Number type extensions
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JavaScript Object type extensions
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JavaScript String type extensions
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JSON serialization
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Profile for JavaScript
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Trace class
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2
．ASP.NET AJAX “Value-Add”CTP：ASP.NET AJAX社区支持的“增值”CTP部分，包括了以前各个Atlas CTP版本包含的，但并不在完全支持的“核心”1.0 版本内的额外的高级特性。通过进一步的反馈，这些将会逐步稳定的增加到核心1.0中去。功能列表如下：
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服务端功能列表
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AutoCompleteExtender class
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Cross-browser Web Parts drag-and-drop
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DragOverlayExtender control
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PopupExtender class
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客户端功能列表
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Actions components
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AutoCompleteBehavior class
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BatchResponse class
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Binding component
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Button control
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Checkbox control
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Click behavior
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Counter class
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Cross-browser Web Parts
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Data control
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DragDropList control
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DragDropManager component
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DraggableListItem control
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FadeAnimation component
Floating behavior
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Hover behavior
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Hyperlink control
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Image control
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Input control
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Label control
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Layout behavior
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Opacity behavior
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Popup behavior
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Selector control
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ServiceMethodRequest class
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Sys.Data and Sys.UI.Data namespaces
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Textbox control
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Timer control
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Validator controls
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xml-script support
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3
．ASP.NET AJAX Control Toolkit：包含了基于ASP.NET AJAX 1.0 版“核心”下载版本的28个非常酷的免费AJAX控件。它是一个开源项目，由微软和非微软开发人员共同开发的，去CodePlex下载代码。
二．安装ASP.NET
AJAX
1
．在安装ASP.NET AJAX 1.0 Beta之前，需要先卸载以前所有的CTP版本。
2
．下载ASP.NET AJAX 1.0 Beta安装包，安装时Microsoft.Web.Extensions.dll程序集将被安装在GAC（Global Assembly Cache）中，所以使用时不需要再在Web站点的Bin文件夹中包括该程序集。
3
．下载安装ASP.NET AJAX “Value-Add”CTP和ASP.NET AJAX Control Toolkit。列表如下：
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名称
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描述
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Accordion:
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Create efficient UI from multiple panes with this animated control.
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AlwaysVisibleControl
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Docks a panel to a corner of the browser window and keeps it visible even when the user scrolls.
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Animation
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Adds powerful, easy to use animations to any element or control.
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CascadingDropDown
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Easily link drop downs, complete with asynchronous population and no postbacks!
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CollapsiblePanel
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This extender allows panels on your page to collapse and expand with no code.
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ConfirmButton
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This extender adds a confirm dialog to any Button, LinkButton, or ImageButton control.
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DragPanel
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Makes any panel into an object that you can drag around the page.
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DropDown
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This extender can wrap any control to provide a SharePoint-style drop-down menu that is attached to the control.
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DropShadow
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This extender adds attractive drop shadows to any control on the page
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DynamicPopulate
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Replace the contents of a page element with the result of a web-service call.
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FilteredTextBox
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Restrict the types of input that text boxes will accept.
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HoverMenu
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Allows UI to pop up next to a control when the mouse hovers over it.
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ModalPopup
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Allows you to show styled modal UI without using HTML dialogs.
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MutuallyExlcusiveCheckBox
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By adding a number of checkboxes to the same “Key”, only one checkbox with the specified key can be checked at a time.
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NoBot
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Applies simple rules to prevent automated bots or scripts from posting to a page.
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NumericUpDown
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Allow users to easily increase and decrease values using the mouse to scroll through values.
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PagingBulletedList
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Add paging and sorting to long bulleted lists.
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PasswordStrength
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Give your users visual cues to help them create secure passwords.
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PopupControl
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This extender turns any panel into a popup.
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Rating
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Let your users easily give feedback by rating content with this easy-to-use control.
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ReorderList
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This control is a full-featured data-bound control that allows its elements to be reordered on the client via drag and drop.
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ResizableControl
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Allow users to dynamically resize content, right in the browser
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RoundedCorners
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Rounds the corners of any control for a clean, professional look!
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Slider
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Adds an elegant scrollbar-like user interface for setting numeric values.
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TextBoxWatermark
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This extender adds "watermark" prompt text to TextBoxes on the page.
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ToggleButton
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This extender turns an ASP.NET CheckBox into an image checkbox.
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UpdatePanelAnimation
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Animates page elements corresponding to hidden postback activity.
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ValidatorCallout
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This extender enhances the functionality of existing ASP.NET validators.
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三．在Visual Studio.NET 2005开发基于ASP.NET AJAX的应用
安装完ASP.NET AJAX后，打开Visual Studio.NET 2005中新建Web Site，在项目模板中会出现一项ASP.NET AJAX-enabled Web site，直接选择它就可以了，如下图：
新建完成的项目中会自动在Web.config中做好相关的配置，并且AJAXExtensionToolbox.dll已经添加到了VS的工具箱中，不需要再手工添加。
概述篇简单的介绍这里，从下一篇开始学习ASP.NET AJAX中的每一项具体的功能。
本文转自lihuijun51CTO博客，原文链接：http://blog.51cto.com/terrylee/67707，如需转载请自行联系原作者
