1. output-caching to cache a whole page
2. fragment caching to cache a part of a page
3. Data caching
The last post we talked about output caching. In this post, we will talk about one of the application on fragment caching: the Substitution Control.
<%@ Page Language="VB" %>
<%@ OutputCache Duration="60" VaryByParam="none" %>
<script runat="server">
Shared Function GetCurrentDate(ByVal context As HttpContext) As String
Return Now.ToString()
End Function
</script>
<html>
<head id="Head1" runat="server">
<title>Post Cache Substitution</title>
</head>
<body>
<form id="form1" runat="server">
<h4>
This page uses post cache substitution to insert a dynamic value into a cached page.</h4>
<p>
Time:
<%= DateTime.Now.ToString() %>
</p>
<p>
<b>Real Time:
<asp:Substitution ID="Substitution1" runat="server" MethodName="GetCurrentDate" />
</b>
</p>
</form>
</body>
</html>
