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Localization and cache

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This message was discovered on ASPFriends.com 'aspngcache' list.
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Ollie Cornes

Does custom output caching in ASP.NET allow me to cache on the basis of the
culture of the page? e.g. if I have URLs like article.aspx?id=123, I can
cache for each value of the id parameter, but can I also split the caching
to cover each copy of the page in the languages supported by article.aspx
(e.g. if article.aspx uses Thread.CurrentCulture to display different
content)?

Ollie
--
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.NET Books - http://www.cornes.org/books/

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Brian Bilbro (VIP)

You'll want the varybyparam option:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpgenref/ht
ml/cpconoutputcache.asp

something like this should work:
<%@ OutputCache ..other options... VaryByParam="id" %>

HTHs,
Brian

----- Original Message -----
From: "Ollie Cornes" <Click here to reveal e-mail address>
Sent: Sunday, December 02, 2001 1:21 PM

> Does custom output caching in ASP.NET allow me to cache on the basis of
the
[Original message clipped]

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G. Andrew Duthie (VIP)

I don't know if you can vary by the culture string easily, but it's
pretty straightforward to vary by the Accept-Language HTTP header, which
might work for you:

<%@ OutputCache Duration=3D"60" VaryByParam=3D"None"
VaryByHeader=3D"Accept-Language" %>

hth,

--
G. Andrew Duthie
Graymad Enterprises, Inc.
Click here to reveal e-mail address

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Brian Bilbro (VIP)

uh, yea..that probably works better. :)

--
Brian

----- Original Message -----
From: "G. Andrew Duthie" <Click here to reveal e-mail address>
To: "aspngcache" <Click here to reveal e-mail address>
Sent: Sunday, December 02, 2001 11:11 PM
Subject: [aspngcache] RE: Localization and cache

I don't know if you can vary by the culture string easily, but it's
pretty straightforward to vary by the Accept-Language HTTP header, which
might work for you:

<%@ OutputCache Duration="60" VaryByParam="None"
VaryByHeader="Accept-Language" %>

hth,

--
G. Andrew Duthie
Graymad Enterprises, Inc.
Click here to reveal e-mail address

[Original message clipped]

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Ollie Cornes

Thanks Andrew, Brian.

The culture setting I need to vary by is the Thread.CurrentCulture value -
that value is set by a cookie that is configured by the user (through a UI),
it isn't available on the HTTP request parameter list and may not always be
the same as the Language header.

It looks like VaryByCustom is what I need with an override of
HttpApplication.GetVaryByCustomString in global.asax. I shall give that a
try and see how it goes - it's a shame the code has to go in global.asax,
I'd have preferred to keep it all within the page itself.

Ollie

----- Original Message -----
From: "Brian Bilbro" <Click here to reveal e-mail address>
To: "aspngcache" <Click here to reveal e-mail address>
Sent: Monday, December 03, 2001 4:21 AM
Subject: [aspngcache] RE: Localization and cache

[Original message clipped]

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Ollie Cornes

The answer to this question is to use a line like this in the .aspx:

<%@ OutputCache Duration="600" varybyparam="id"
varybycustom="LanguageChoice" %>

Then I set up the LanguageChoice custom caching value in my global.asax.cs
like this:

public override string GetVaryByCustomString(HttpContext context, string
arg)
{
switch (arg)
{
case "LanguageChoice":
string langChoice = "";
if (Request.Cookies["CulturePref"] != null)
{
langChoice = Request.Cookies["CulturePref"].Value;
}
return "LanguageChoice=" + langChoice;
default:
return "";
}
}

In my case the cookie (CulturePref) stores the user's culture (e.g. en-GB),
so I cache on the basis of that value.

Works like a charm.

Ollie
--
Click here to reveal e-mail address
.NET Books - http://www.cornes.org/books/

----- Original Message -----
From: "Brian Bilbro" <Click here to reveal e-mail address>
To: "aspngcache" <Click here to reveal e-mail address>
Sent: Monday, December 03, 2001 4:21 AM
Subject: [aspngcache] RE: Localization and cache

[Original message clipped]

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	System.Threading.Thread
	System.Web.HttpApplication
	System.Web.HttpContext

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