1<%...@ Control Language="C#" AutoEventWireup="true" CodeFile="CacheControl.ascx.cs"
 2    Inherits="Cahce_CacheControl" %>
 3<%...@ OutputCache Duration="10" VaryByControl="DropDownList1" %>
 4<p>
 5    <%=DateTime.Now %>
 6</p>
 7<p>
 8    <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="XmlDataSource1"
 9        DataTextField="text" DataValueField="value">
10    </asp:DropDownList><asp:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/Config/DropDownListData.xml">
11    </asp:XmlDataSource>
12</p>
13<p>
14    <asp:Button ID="btn" runat="Server" Text="提交" />
15</p>
16