How to add a Value to Model State while there is already a key for that? MVC3

Question

Good Morning, Evening or night

I was wondering how I can add a value to an existing key in ModelState. Here is what I have done yet:

[HttpPost]
    public ActionResult Create(VM_RoleGroup vm_roleGroup)
    {
        RoleGroup roleGroups = Mapper.Map<VM_RoleGroup, MAHAL_E_MA_Model.POCO.RoleGroup>(vm_roleGroup);
        roleGroups.ModifiedDate = UtilityHands.GeneralTools.ConvertToShamsi(DateTime.Now);
        roleGroups.Description = vm_roleGroup.Description ?? MAHAL_E_MA_Proj.ApplicationResources.GeneralResource.NoDescription;

        **if (ModelState.ContainsKey("ModifiedDate") && ModelState["ModifiedDate"].Value == null)
        {
            ModelState["ModifiedDate"].Value = new ValueProviderResult("", roleGroups.ModifiedDate, CultureInfo.CurrentUICulture);    
        }
        else if (!ModelState.ContainsKey("ModifiedDate"))
        {
            ModelState.Add("ModifiedDate", new ModelState { Value = new ValueProviderResult("", roleGroups.ModifiedDate, CultureInfo.CurrentUICulture) });
        }**

        if (ModelState.IsValid)
        {
            unitOfWork.RoleGroupRepository.InsertData(roleGroups);
            unitOfWork.RoleGroupRepository.Save();
            return RedirectToAction("Index");
        }

        return View(vm_roleGroup);
    }

But the ModelState is still invalid since it lacks the Value of a key named 'ModifiedDate'. Remember that, the value is not set on the client side by the user. It needs to be set programmatically. By the way, The 'ModifiedDate' is a required field in the database.

Any ideas pleas? Thanks in advance

Answer 1

you should pass the ModifiedDate through as part of the viewmodel, and then just overwrite it to DateTime.Today in the controller.

ie. prepopulate it the view

@Html.Hidden(Model.ModifiedDate,DateTime.Today);

and since this isn'tsecure, overwrite it in the controller

roleGroups.ModifiedDate = DateTime.Today;

or if its a universal field across your entire application (on all models), you can actually add custom code to do this in the mapper, but I'm unsure of the circumstances.