Check model's ModelState in FileStreamResult action in ASP.NET MVC

I ha开发者_如何学运维ve a page that a user selects what he wants to download, the submit button posts the form to

public FileStreamResult GetFiles(FileSelectionModel model)
{
   //zips files into one zip
   return File();
}

However, what if the model wasn't in a valid state? How do I check it? It wouldn't let me return View() or return RedirectToAction() here

thanks

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Change the return type of your action from FileStreamResult to the more generic ActionResult, then you can return View() or RedirectToAction().

HTHs,
Charles