一个展开收合的ajaxToolkit:AccordionPane控件。Insus.NET在专案有用到它。 因为它可以节省显示空间。不过有点不足，就是用户刚开始使用，需要记得每个AccordionPane内容。或是需要使用一个显而可见的名字。下面的演示中，只是两个收合AccordionPane，如果多个的话，就会有上面提及的问题。

下面是HTML:ajaxToolkit:Accordion
复制代码 代码如下:
<ajaxToolkit:Accordion ID="Accordion1" runat="server" SelectedIndex="-1" HeaderCssClass="accordionHeader"
                HeaderSelectedCssClass="accordionHeaderSelected" ContentCssClass="accordionContent"
                FadeTransitions="true" FramesPerSecond="5" TransitionDuration="250" AutoSize="None"
                RequireOpenedPane="false" SuppressHeaderPostbacks="true">
                <Panes>
                    <ajaxToolkit:AccordionPane ID="AccordionPane1" runat="server">
                        <Header>
                            条件
                        Header>
                        <Content>
                           <Content>
                    ajaxToolkit:AccordionPane>
                    <ajaxToolkit:AccordionPane ID="AccordionPane4" runat="server">
                        <Header>
                            日期
                        Header>
                        <Content>

                        <Content>
                    <ajaxToolkit:AccordionPane>
                <Panes>
            <ajaxToolkit:Accordion>

下面是CSS:Accordion

复制代码 代码如下:
.accordionHeader
{
    border: 1px solid #acacac;
    color: #0f2336;
    background-color: #d2e6fa;
    font-family: Arial, Sans-Serif;
    font-size: 12px;
    padding: 5px;
    margin-top: 5px;
    cursor: pointer;
}
.accordionHeaderSelected
{
    border: 1px solid #acacac;
    color: #0f2336;
    background-color: #97b3d1;
    font-family: Arial, Sans-Serif;
    font-size: 12px;
    padding: 5px;
    margin-top: 5px;
    cursor: pointer;
}
.accordionContent
{
    background-color: #f4f7fc;
    border: 1px dashed #acacac;
    border-top: none;
    padding: 5px;
    padding-top: 10px;
}