Adding Items with Dependencies : SqlDataSource cache « Cache « ASP.NET Tutorial






<%@ Page Language="C#" Trace="true" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<!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()
    {
        DataSet products = (DataSet)Cache["Products"];
        if (products == null)
        {
            Trace.Warn("Retrieving products from file system");
            products = new DataSet();
            products.ReadXml(MapPath("~/Data.xml"));
            CacheDependency fileDepend = new CacheDependency(MapPath("~/Data.xml"));
            Cache.Insert("Products", products, fileDepend);
        }
        grdProducts.DataSource = products;
        grdProducts.DataBind();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show File Dependency</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

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

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








13.13.SqlDataSource cache
13.13.1.SqlDataSource caching
13.13.2.Adding Items with an Absolute Expiration Policy
13.13.3.Adding Items with a Sliding Expiration Policy
13.13.4.Adding Items with Dependencies