Should I be passing values through RedirectToAction or TempData?

Question

I\'ve seen some articles (even MSDN) suggest TempData for passing data between ActionMethods. But I\'ve seen others here say that TempData should be avoided. What\'s the bes

Answer 1

It sounds like you are coupling your action methods to your end result too tightly.

I would refactor a little bit; you would have your Index Method like so:

 public ActionResult Index()
 {
      HTMLMVCCalendar.Models.MonthModel someModel = new HTMLMVCCalendar.Models.MonthModel();

      someModel.DateTime = DateTime.Now; // whatever

      return View(someModel);
 }

Then, when you need to recalculate your calendar, you simply post to the same URL which returns the same view with new view model data.

 [HttpPost]
 public ActionResult Index(HTMLMVCCalendar.Models.MonthModel previousModel, bool? goForward)
 {
      if(goForward.HasValue && goForward.Value)
            previousModel.DateTime = previousModel.DateTime.AddMonths(1);
      else
            previousModel.DateTime = previousModel.DateTime.AddMonths(-1);

      return View(previousModel);
 }

You stay on the same URL and present the same view, but with the changes that you need. You dont need a specific endpoint for each action.