ASP.Net MVC return View with a new instance of the model instead of using redirect to action

Question

I have a form view that uses a ViewModel. The new view is displayed in the "New" action. When this form is submitted, I submit the information to the Add action.

If all the actions in the database are successful, I want to update the view. I create a new viewmodel instance from within the Add action and return a View (New, viewModel). This does not update my mind. All old values ​​(which were presented) remain in the view. Is there a way to refresh the page without the RedirectToAction method.

I read in another post that ModelState.Clear should not be used as it may have an undesirable result.

Thank,

Mar

Edit 1 - Added code

New

 public ActionResult New(string id)
        {
            var sysId= new Guid(id);
.......
........

  string Details = pDto.Name + "(" + pDto.Code + ")";

            var vm= new ViewModel(id);
            vm.Details = Details;

            return View(vm);
        }



 public ActionResult Add(ViewModel vm)
        {
                        ViewModel vm= vm;

            if (ModelState.IsValid)
            {

                              var dto= _qRepository.GetFeaturesBy(viewModel.Code);

                if (dto!= null)
                {

                    ModelState.AddModelError("Code", "Code is already in Use.");

                    return View("New", viewModel);
                }

                _productService.AddFeature(..........);
               // ModelState.Clear();  -- this works          
                vm= new ViewModel(vm.pId) { Message = "Code" + viewModel.Code + " was added ......", Details = vm.Details };

            }


          return  View ("New", vm);

        }

Answer 1

post-redirect-get. , , - , , . , post action. ModelState, .

RedirectToAction("New"), , . , , New, - [HttpPost] PostModel. , , , html, .

Answer 2

.

, HTMLHelpers ViewState ModelState , , .

, ModelState ModelState .

Answer 3

, "" ?

RedirectToAcction will trigger a 302 response, and then a new “Get” into the new form.