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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 |
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 |
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 |
描述 |
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Accordion: |
Create efficient UI from multiple panes with this animated control. |
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AlwaysVisibleControl |
Docks a panel to a corner of the browser window and keeps it visible even when the user scrolls. |
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Animation |
Adds powerful, easy to use animations to any element or control. |
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CascadingDropDown |
Easily link drop downs, complete with asynchronous population and no postbacks! |
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CollapsiblePanel |
This extender allows panels on your page to collapse and expand with no code. |
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ConfirmButton |
This extender adds a confirm dialog to any Button, LinkButton, or ImageButton control. |
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DragPanel |
Makes any panel into an object that you can drag around the page. |
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DropDown |
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 |
This extender adds attractive drop shadows to any control on the page |
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DynamicPopulate |
Replace the contents of a page element with the result of a web-service call. |
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FilteredTextBox |
Restrict the types of input that text boxes will accept. |
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HoverMenu |
Allows UI to pop up next to a control when the mouse hovers over it. |
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ModalPopup |
Allows you to show styled modal UI without using HTML dialogs. |
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MutuallyExlcusiveCheckBox |
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 |
Applies simple rules to prevent automated bots or scripts from posting to a page. |
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NumericUpDown |
Allow users to easily increase and decrease values using the mouse to scroll through values. |
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PagingBulletedList |
Add paging and sorting to long bulleted lists. |
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PasswordStrength |
Give your users visual cues to help them create secure passwords. |
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PopupControl |
This extender turns any panel into a popup. |
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Rating |
Let your users easily give feedback by rating content with this easy-to-use control. |
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ReorderList |
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 |
Allow users to dynamically resize content, right in the browser |
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RoundedCorners |
Rounds the corners of any control for a clean, professional look! |
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Slider |
Adds an elegant scrollbar-like user interface for setting numeric values. |
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TextBoxWatermark |
This extender adds "watermark" prompt text to TextBoxes on the page. |
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ToggleButton |
This extender turns an ASP.NET CheckBox into an image checkbox. |
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UpdatePanelAnimation |
Animates page elements corresponding to hidden postback activity. |
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ValidatorCallout |
This extender enhances the functionality of existing ASP.NET validators. |
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。
下篇预告：ASP.NET AJAX入门系列（2）：使用ScriptManager
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原文地址：http://www.cnblogs.com/feng-NET/p/4696469.html
