3．下载安装ASP.NET AJAX “Value-Add”CTP和ASP.NET AJAX Control Toolkit。列表如下：
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。
名称
描述
Accordion:
Create efficient UI from multiple panes with this animated control.
AlwaysVisibleControl
Docks a panel to a corner of the browser window and keeps it visible even when the user scrolls.
Animation
Adds powerful, easy to use animations to any element or control.
CascadingDropDown
Easily link drop downs, complete with asynchronous population and no postbacks!
CollapsiblePanel
This extender allows panels on your page to collapse and expand with no code.
ConfirmButton
This extender adds a confirm dialog to any Button, LinkButton, or ImageButton control.
DragPanel
Makes any panel into an object that you can drag around the page.
DropDown
This extender can wrap any control to provide a SharePoint-style drop-down menu that is attached to the control.
DropShadow
This extender adds attractive drop shadows to any control on the page
DynamicPopulate
Replace the contents of a page element with the result of a web-service call.
FilteredTextBox
Restrict the types of input that text boxes will accept.
HoverMenu
Allows UI to pop up next to a control when the mouse hovers over it.
ModalPopup
Allows you to show styled modal UI without using HTML dialogs.
MutuallyExlcusiveCheckBox
By adding a number of checkboxes to the same “Key”, only one checkbox with the specified key can be checked at a time.
NoBot
Applies simple rules to prevent automated bots or scripts from posting to a page.
NumericUpDown
Allow users to easily increase and decrease values using the mouse to scroll through values.
PagingBulletedList
Add paging and sorting to long bulleted lists.
PasswordStrength
Give your users visual cues to help them create secure passwords.
PopupControl
This extender turns any panel into a popup.
Rating
Let your users easily give feedback by rating content with this easy-to-use control.
ReorderList
This control is a full-featured data-bound control that allows its elements to be reordered on the client via drag and drop.
ResizableControl
Allow users to dynamically resize content, right in the browser
RoundedCorners
Rounds the corners of any control for a clean, professional look!
Slider
Adds an elegant scrollbar-like user interface for setting numeric values.
TextBoxWatermark
This extender adds "watermark" prompt text to TextBoxes on the page.
ToggleButton
This extender turns an ASP.NET CheckBox into an image checkbox.
UpdatePanelAnimation
Animates page elements corresponding to hidden postback activity.
ValidatorCallout
This extender enhances the functionality of existing ASP.NET validators.
