Varying the Output Cache by Control : Page Output Cache « Cache « ASP.NET Tutorial
- ASP.NET Tutorial
- Cache
- Page Output Cache
File: MasterDetails.aspx
<%@ Page Language="C#" %>
<%@ OutputCache Duration="3600" VaryByControl="dropCategories" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Master/Details</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<%= DateTime.Now.ToString("T") %>
<hr />
<asp:DropDownList
id="dropCategories"
DataSourceID="srcCategories"
DataTextField="Name"
DataValueField="Id"
Runat="server" />
<asp:Button
id="btnSelect"
Text="Select"
Runat="server" />
<br /><br />
<asp:GridView
id="grdProducts"
DataSourceID="srcProducts"
GridLines="none"
Runat="server" />
<asp:SqlDataSource
id="srcCategories"
ConnectionString="<%$ ConnectionStrings:Products %>"
SelectCommand="SELECT Id,Name FROM ProductCategories"
Runat="server" />
<asp:SqlDataSource
id="srcProducts"
ConnectionString="<%$ ConnectionStrings:Products %>"
SelectCommand="SELECT Title,Director FROM Products
WHERE CategoryId=@CategoryId"
Runat="server">
<SelectParameters>
<asp:ControlParameter
Name="CategoryId"
ControlID="dropCategories" />
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>