cachedusercontrol.ascx

Developing Microsoft ASP.NET Server Controls and Components

<%@ OutputCache Duration="60" VaryByControl="language" %>
<%@ Control Language="C#" ClassName="CachedUserControl" %>
<script runat="server">   
  public void Page_Load(object sender, EventArgs e) {
      label1.Text="The selected language is " + language.SelectedItem.Text + ".";
      timeLabel.Text = DateTime.Now.TimeOfDay.ToString();
  } 
</script>
<p>
Time stamp on user control:
<asp:label id="timeLabel" runat="server" />
<p>
 Select a programming language:
<p>
<asp:DropDownList width="100" id="language" runat="server">
  <asp:ListItem>C#</asp:ListItem>
  <asp:ListItem>Visual Basic .NET</asp:ListItem>
  <asp:ListItem>JScript .NET</asp:ListItem>
</asp:DropDownList>
<p>
<asp:label id="label1" runat="server" />
<p></p>