Who am I and what do I do?
Hi, I´m Jamie Dixon, a Freelance Web Developer and Software Engineer. I´ve been developing websites and desktop applications for over 6 years and specialise in Microsoft™ technologies
Right now I´m working with Profero on a new project for ASOS.
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Replacing Request.IsAjaxRequest() with ActionFilter
Posted on December 8th, 2010 No commentsEver wondered if you can replace all those
if(Request.IsAjaxRequest()) { // return some partial view }
with an action filter?
Although it’s not much code to write the above in many controller methods, I was intrigued to figure out how this behaviour could be replaced through the use of a custom ActionFilter. Here’s what I came up with (It might not be any better than using the above and this was created purely out of a desire to figure out how possible it could be):
Action Filter:
public class ReturnPartialForAjaxRequestActionFilter : ActionFilterAttribute { public string ViewName { get; set; } public override void OnActionExecuted(ActionExecutedContext filterContext) { if (ViewName != null) { var request = filterContext.RequestContext.HttpContext.Request; if (request.IsAjaxRequest()) { var result = (ViewResult)filterContext.Result; filterContext.Result = new PartialViewResult { ViewName = ViewName, ViewData = result.ViewData }; } } base.OnActionExecuted(filterContext); } }
Usage:
[ReturnPartialForAjaxRequestActionFilter(ViewName = "PartialViewName")] public ActionResult MyActionResult() { }
This is possibly a bit overkill given that it most likely involves more typing than simply writing out the original if statement however as a thought exercise it was quite fun to implement.
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