Cannot add items programatically to HTML5 cache-manifest

[gamosone]

I am using HTML5 cache manifest to build to be able to load some ASP.NET pages (text and images) even without internet connection. I have data stored on a database and would like to access this data when connection is available and add the image names which I have in my records to the cache manifest file so that they can be cached and accessed when offline. Images will always reside in the same folder but the contents (images) of this folder will change when people add or remove images from the server via CMS.I am using asp.net and c#. How can I do this please? Is there a way to actually add the image names programatically to the cache manifest file and then refresh it? Can I cache the entire folder? What is the simplest please?Thanks,Jean