Mega Code Archive
Using Polling SQL Cache Dependencies with Data Caching
<![CDATA[
<%@ Page Language="C#" Trace="true" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Web.Configuration" %>
<!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()
{
DataTable products = (DataTable)Cache["Products"];
if (products == null)
{
products = GetProductsFromDB();
SqlCacheDependency sqlDepend = new SqlCacheDependency("MyDatabase", "Products");
Cache.Insert("Products", products, sqlDepend);
}
grdProducts.DataSource = products;
grdProducts.DataBind();
}
private DataTable GetProductsFromDB()
{
Trace.Warn("Retrieving data from database");
string conString = WebConfigurationManager.ConnectionStrings ["Products"].ConnectionString;
SqlDataAdapter dad = new SqlDataAdapter("SELECT Title,Director FROM Products", conString);
DataTable products = new DataTable();
dad.Fill(products);
return products;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Polling SQL Data Cache</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView
id="grdProducts"
Runat="server" />
</div>
</form>
</body>
</html>
]]>