AJAX Control Toolkit——PopupControlExtender（快顯視窗）

PopupControl is an ASP.NET AJAX extender that can be attached to any control in order to open a popup window that displays additional content. This popup window will probably be interactive and will probably be within an ASP.NET AJAX UpdatePanel, so it will be able to perform complex server-based processing (including postbacks) without affecting the rest of the page. The popup window can contain any content, including ASP.NET server controls, HTML elements, etc. Once the work of the popup window is done, a simple server-side call dismisses it and triggers any relevant script on the client to run and update the page dynamically.

TargetControlID——附加到的控制項的ID

PopupControlID——彈出顯示的控制項ID

Position——彈出控制項相對目標控制項的位置（Left,Right, Top, Bottom, Center）

CommitProperty——目標控制項要從彈出控制項得到的屬性值（可選）

CommotScript——擷取彈出控制項屬性值的指令碼

OffsetX/OffsetY——水平、豎直方向距預設位置的位移距離

Animations

——OnShow

——OnHide

範例程式碼：

 1 <asp:ScriptManager ID="ScriptManager1" runat="server" />
 2         <div>
 3             <br />
 4             ToDo:
 5             <asp:TextBox ID="MyTextBox" runat="server" Width="538px"></asp:TextBox>
 6             <br />
 7             <asp:Panel ID="Panel1" runat="server" CssClass="popupControl">
 8                 <asp:UpdatePanel ID="UpdatePanel1" runat="server">
 9                     <ContentTemplate>
10                         <asp:RadioButtonList ID="RadioButtonList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged"
11                             Width="146px">
12                             <asp:ListItem Text="Scott Guthrie" ></asp:ListItem>
13                             <asp:ListItem Text="Simon Muzio"></asp:ListItem>
14                             <asp:ListItem Text="Brian Goldfarb"></asp:ListItem>
15                             <asp:ListItem Text="Joe Stagner"></asp:ListItem>
16                             <asp:ListItem Text="Shawn Nandi"></asp:ListItem>
17                         </asp:RadioButtonList>
18                     </ContentTemplate>
19                 </asp:UpdatePanel>
20             </asp:Panel> 
21             <br />
22             <ajaxToolkit:PopupControlExtender ID="PopupControlExtender1" runat="server" CommitProperty="value"
23                 CommitScript="e.value += ' - SEND A MEETING REQUEST!';" PopupControlID="Panel1"
24                 Position="Bottom" TargetControlID="MyTextBox">
25             </ajaxToolkit:PopupControlExtender>    
26             
27         </div>

簡單CSS

.popupControl
{
    background-color:#AAD4FF;
    position:absolute;
    visibility:hidden;
    border-style:solid;
    border-color: Black;
    border-width: 2px;
}