$.getJSON returning cached data in IE8

Question

I\'m playing around with ASP.net MVC and JQuery at the moment. I\'ve come across behavour which doesn\'t seem to make sense.

I\'m calling JQuery\'s $.getJSON

Answer 1

Just to let you know, Firefox and Chrome consider all Ajax request as non-cachable. IE (all versions) treat Ajax call just as other web request. That's why you see this behavior.
How to force IE to download data at each request:

• As you said, use 'cache' or 'nocache' option in JQuery
• Add a random parameter to the request (ugly, but works :))
• On server side, set cachability (for example using an attribute, see below)

Code:

public class NoCacheAttribute : ActionFilterAttribute
{
    public override void OnActionExecuted(ActionExecutedContext context)
    {
        context.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
    }
}