In ASP.NET can I cache a <body>'s background image?

Mike · Nov 25, 2007

Hi. I'm building an ASP.NET 2.0 web-app for a customer. The customer wants
a background image that's 124k in size as the background for each page. I've
recommended they use a smaller-size image, but the customer is absolutely
adamant about using the image.

I'm afraid that this large image will degrade performance if it's loaded for
each page. Can I somehow use ASP.NET caching to cache the background image
so it doesn't have to refresh on each page load?

Thanks, Mike

Juan T. Llibre · Nov 25, 2007

Set a custom header, which specifies "max-age".

Open the IIS Manager snap-in from Administrative Tools, pick an app,
right click, go to Properties, switch to the HTTP Headers tab, and click Add.

Add cache-control extensions like this:

In the "Custom Header Name", type : Cache-Control

In the Custom Header Value, type :

"Cache-Control:max-age=NumberOfSeconds"

OK your way out of the dialog...

I use :
"Cache-Control:max-age=1200"
....which will cache images for the default session timout ( 20 minutes ).

Guest · Nov 25, 2007

Can I somehow use ASP.NET caching to cache the background image
so it doesn't have to refresh on each page load?

Mike, you can also write a custom HttpHandler and map images to the
ASP.NET ISAPI in IIS. And then from ASP.NET you will be able to add
cache contol values, the same what Juan told you

Response.Cache.AppendCacheExtension("max-age=NumberOfSeconds");

I would also recommend you to check:
http://aspnetresources.com/blog/cache_control_extensions.aspx

Mike · Nov 26, 2007

Thank you both for your help!

Anon User said:
Mike, you can also write a custom HttpHandler and map images to the
ASP.NET ISAPI in IIS. And then from ASP.NET you will be able to add
cache contol values, the same what Juan told you

Response.Cache.AppendCacheExtension("max-age=NumberOfSeconds");

I would also recommend you to check:
http://aspnetresources.com/blog/cache_control_extensions.aspx

Wainage · Nov 29, 2007

Easiest way ... CSS file

I need help fixing my website	2	Oct 15, 2023
ASP.NET Menus's Background Images	1	Aug 7, 2008
Cache performance in ASP.NET 2.0	1	Sep 20, 2007
Can I cache a DataTable in a Session object?	2	Jun 7, 2007
I need help in understanding these files on my phone, Could someone help me understand these files? Urgent help needed. Please help.	3	Jun 4, 2023
Measuring Cache object sizes in ASP.NET 2.0	2	Sep 18, 2007
using image in MenuItems	0	Mar 1, 2009
Best way to cache a bunch of images on the client? Possible to "stream" image info for caching after	1	Jun 16, 2007

In ASP.NET can I cache a <body>'s background image?

Mike

Juan T. Llibre

Guest

Mike

Wainage

Ask a Question

Similar Threads

Members online

Forum statistics

Latest Threads