Manipulating the Page Output Cache Programmatically : Page Output Cache « Cache « ASP.NET Tutorial






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  2. Cache
  3. Page Output Cache
HttpCachePolicy class can perform all the tasks that you can perform with the <%@ OutputCache %> directive. 

The page is cached on the browser, proxy servers, and web server for 15 seconds.

File: Default.aspx

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    void Page_Load()
    {
        Response.Cache.SetCacheability(HttpCacheability.Public);
        Response.Cache.SetExpires(DateTime.Now.AddSeconds(15));
        Response.Cache.SetMaxAge(TimeSpan.FromSeconds(15));
        Response.Cache.SetValidUntilExpires(true);
        Response.Cache.SetLastModified(DateTime.Now);
        Response.Cache.SetOmitVaryStar(true);
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Program OutputCache</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <%= DateTime.Now.ToString("T") %>

    <br /><br />
    <a href="Default.aspx">Request this Page</a>

    </div>
    </form>
</body>
</html>








13.9.Page Output Cache
13.9.1.You enable Page Output Caching by adding an <%@ OutputCache %> directive to a page.
13.9.2.OutputCache Duration="20" VaryByParam="None"
13.9.3.Varying the Output Cache by Parameter
13.9.4.Varying the Output Cache by Control
13.9.5.Varying the Output Cache by Header
13.9.6.Varying the Output Cache by Browser
13.9.7.Varying the Output Cache by a Custom Function
13.9.8.Manipulating the Page Output Cache Programmatically
13.9.9.Creating Page Output Cache Profiles