CODEWITHSUNDEEP
c#asp.net.netc#-4.0
R.C
R.C

Reputation: 10565

Response.Cache.SetCacheability not working

While trying to cache a page using Response.Cache.SetCacheability(), I debug the program (F5) . However I'm unable to get this to work. Each time after clicking the button1, the Lable1 text is updated instantaneously.

Code Behind file: 

Response.Cache.SetCacheability(HttpCacheability.ServerAndNoCache);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(1000));
Response.Cache.SetValidUntilExpires(true);
label1.Text = " Using HTTP CachePolicy class" + DateTime.Now.ToString();

Here is my .ASPX page: 

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" Runat="Server">
<asp:Label runat="server" Text="Label" ID="label1"></asp:Label>
    <asp:Button ID="Button1" runat="server" Text="Button" />
</asp:Content>

Please help. I'm even unable to get this very basic example!

Upvotes: 2

Views: 2310

Answers (2)

R.C
R.C

Reputation: 10565

we also need to add this line programmatically:

Response.Cache.VaryByParams.IgnoreParams = true; // in case we are not using any VaryByParams parameter.

Here I wasn't using any parameters for varying the cache. So after putting the above line of code in addition to my question, it started working .

I also observed that in declarative markup, if we omit VaryByParams then it will throw errors. This will never work.

<%@ OutputCache Duration="60" %>

But this will work:

<%@ OutputCache Duration="60" VaryByParam="None" %>

Upvotes: 1

to StackOverflow
to StackOverflow

Reputation: 124804

Clicking the button will cause a POST, which will always go to the server even if the page is cached.

Upvotes: 2

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