Question

I have two actions in a controller. One that displays a form for file upload and another one that displays the results of the upload.
I have created a POCO called FileInfo i.e

public class FileInfo
    {
        public string Name { get; set; }
        public int Length { get; set; }
        public string FileType { get; set; }
        public string ErrorMessage { get; set; }

    }

When I submit the form, the Upload action creates and populates the FileInfo object and then redirects to the second action called results. I want to be able to use the same file info object in the results action.

I am able to get around this using TemPData[], but it is limited since it only holds object data for a single request. I presume there must be a better way to share abjects between controller actions.Any help is appreciated!

// Upload Action

 List<FileInfo> fileInfo= new List<FileInfo>();
//populate  the fileInfo object using fi.Add()

if ((status.ToString() == "OK"))
             {
                 TempData["Info"] = fileInfo;
                 return RedirectToAction("Results");

             }
             else
             {
                 return RedirectToAction("Index");
             }

//Results action.

public ActionResult Results()
        {
            List<FileInfo> fi = TempData["Info"] as List<FileInfo>;
            if (fi != null)
            {
                return View(fi);
            }
            else
            {
                return View("Index");
            }
        }

Answer 1

If you need something to stick around longer then one subsequent request, you will have to put it in Session or in persistent storage (e.g. database).