Using a Sliding Cache Expiration Policy : Expiration « Cache « ASP.NET Tutorial






  1. ASP.NET Tutorial
  2. Cache
  3. Expiration
The cache duration is set to 15 seconds. 

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">
    protected void srcProducts_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
    {
        lblMessage.Text = "Selecting data from database";
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>DataSource Sliding Cache</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    
    <asp:Label
        id="lblMessage"
        EnableViewState="false"
        Runat="server" />

    <asp:GridView
        id="grdProducts"
        DataSourceID="srcProducts"
        Runat="server" />

    <asp:SqlDataSource
        id="srcProducts"
        EnableCaching="True"
        CacheExpirationPolicy="Sliding"
        CacheDuration="15"
        SelectCommand="SELECT * FROM Products"
        ConnectionString="<%$ ConnectionStrings:Products %>"
        OnSelecting="srcProducts_Selecting"
        Runat="server" />

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








13.5.Expiration
13.5.1.Expiring the Page Output Cache Programmatically
13.5.2.Using an Absolute Cache Expiration Policy
13.5.3.Using a Sliding Cache Expiration Policy