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<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Register Src="Control.ascx" TagName="VaryByControl" TagPrefix="uc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<uc1:VaryByControl ID="VaryByControl1" runat="server" />
</div>
</form>
</body>
</html>
File: Control.ascx
<%@ Control Language="C#"
AutoEventWireup="true"
CodeFile="Control.ascx.cs"
Inherits="VaryByControl" %>
<%@ OutputCache Duration="30" VaryByControl="lstMode" %>
<asp:DropDownList id="lstMode" runat="server" Width="187px">
<asp:ListItem>Large</asp:ListItem>
<asp:ListItem>Small</asp:ListItem>
<asp:ListItem>Medium</asp:ListItem>
</asp:DropDownList> <br />
Control generated at:<br />
<asp:label id="TimeMsg" runat="server" />
File: Control.ascx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class VaryByControl : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
switch (lstMode.SelectedIndex)
{
case 0:
TimeMsg.Font.Size = FontUnit.Large;
break;
case 1:
TimeMsg.Font.Size = FontUnit.Small;
break;
case 2:
TimeMsg.Font.Size = FontUnit.Medium;
break;
}
TimeMsg.Text = DateTime.Now.ToString("F");
}
}
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