June 2002
Intermediate to advanced
816 pages
28h 12m
English
Content preview from ASP.NET in a NutshellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
AddCacheItemDependency
Synopsis
Response.AddCacheItemDependency(ByVal cacheKey As String)
Adds a cache item key to the list of cache keys upon which the output cache of the current response depends. If the cache item identified by the key is modified, the output cache of the current response will be invalidated and a fresh response will be generated.
Parameters
-
cacheKey A String containing the cache item key to add.
Example
The example shows how you can use the AddCacheItemDependency method to set a cache key as a dependency for the output cache of the current response. If the cache item represented by this key is modified, the output cache is invalidated and the page is refreshed by using Response.Redirect.
<%@ Page Language="vb" %>
<%@ OutputCache Duration="300" VaryByParam="None" %>
<html>
<head>
<title>Adding a cache dependency in ASP.NET</title>
<script runat="server">
Sub Page_Load( )
Response.AddCacheItemDependency("Key1")
Message.Text = DateTime.Now.ToString( )
End Sub
Sub Button1_Click(sender As Object, e As EventArgs)
Cache("Key1") = "foo" & DateTime.Now.ToString( )
Response.Redirect("AddCacheItemDependency.aspx")
End Sub
</script>
</head>
<body>
<form runat="server">
<asp:label id="Message" runat="server"/>
<asp:button id="Button1" text="Change Key 1" onClick="Button1_
Click" runat="server"/>
</form>
</body>
</html>Notes
The AddCacheItemDependency method provides the same functionality as the AddCacheItemDependencies method, but for a single cache item rather than multiple ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.