首先是下载AjaxControlToolkit的dll以及atlas需要的两个个dll(System.Web.Extensions.Design.dll,System.Web.Extensions.dll)

在普通website项目里引用这三个dll.web.config里面加上如下配置:

<httpHandlers>
            <remove verb="*" path="*.asmx"/>
            <add verb="*" path="*.asmx" validate="false"
                 type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
            <add verb="*" path="*_AppService.axd" validate="false"
                 type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
            <add verb="GET,HEAD" path="ScriptResource.axd"
                 type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
        </httpHandlers>
        <httpModules>
            <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        </httpModules>
  <pages>
   <controls>
    <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
   </controls>
</pages>

ok,添加一个CalendarExtender来体验体验吧.

<asp:ScriptManager ID="ScriptManager1" runat="server">     </asp:ScriptManager>
        <asp:TextBox runat="server" ID="Date2" autocomplete="off" /><br />
        <ajaxToolkit:CalendarExtender ID="customCalendarExtender" runat="server"
            TargetControlID="Date2"
            CssClass="MyCalendar"
            Format="MMMM d, yyyy" />