Getting the value of IFormCollection from one controller to another controller

Question

I am getting some values in IFormCollection when I click on the submit button on my Razor page.

      [HttpPost]
      [ValidateAntiForgeryToken]
      public async Task<IActionResult> Index(IFormCollection collection)
      {
          try
          {
              TempData["Param"] = JsonConvert.SerializeObject(collection);
            //, new {  = collection }
              return  RedirectToAction("Index", "ReassignmentReport");
          }
          catch
          {
              return View();
          }
      }

below is the image of the values that I am getting in the controller.

I am storing the collection in TempData so that I can retrieve the value on other controller where I am redirecting my page to. I am not sure how to retrieve the value on the other controller. I want to retrieve individual value for Title, Sections, EmployeeName and Locations. This is what I have on the other controller where I am redirecting my page to:

    public async Task<IActionResult> Index()
    {
       
        IFormCollection p = JsonConvert.DeserializeObject(TempData["Param"].ToString());   //TempData["Param"].ToString();
        DataTable = await GetReassignData();
        return View(DataTable);
    }

above code does not work, but I want the way to retrieve the values of all four variables that I am passing to this controller.

any help will be appreciated.

Answer 1

Hi @Anjali Agarwal,

The reason why you face the error is you couldn't directly deserialize the object with a iformfilecollection . You could use a custom model and use that custom model to serialize the object.

More details, you could refer to below codes:

1.Create a custom model:

    public class FormDataModel
    {
        public string Title { get; set; }
        public string Sections { get; set; }
        public string EmployeeName { get; set; }
        public string Locations { get; set; }
    }

2.Use it inside the controller:

          // Create an instance of the custom model and populate it
          var formData = new FormDataModel
          {
              Title = collection["Title"],
              Sections = collection["Sections"],
              EmployeeName = collection["EmployeeName"],
              Locations = collection["Locations"]
          };

          try
          {
              TempData["Param"] = JsonConvert.SerializeObject(formData);
               //, new {  = collection }
              return RedirectToAction("Index", "Employee");
          }
          catch
          {
              return View();
          }

Usage:

        public IActionResult Index()
        {
            var resul2t = TempData["Paramtwo"].ToString();
 
            // Deserialize the JSON back to the custom model
            var formData = JsonConvert.DeserializeObject<FormDataModel>(TempData["Param"].ToString());

            // Access individual values
            var title = formData.Title;
            var sections = formData.Sections;
            var employeeName = formData.EmployeeName;
            var locations = formData.Locations;        
            return View();       
  }

Result:

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