TryUpdateModel not working in ASP.NET MVC 1

I'm using DataAnnotation for validation.

The Post for Create Action returns Model accountElement, and one of the field is AccountID which is required and is Validated using Dataannotation.

In the Post Action for create I'm hard wiring the AccountID value to 1 (accountElement.AccountID = 1; code below) and then I use TryUpdateModel. Shouldn't this Update the AccountID to 1.

But ModelState.IsValid is always false.

How do i update the Model value in the code before it gets Validated or is this facility added in ASP.NET MVC 2. Are there any work arounds??

[AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create([Bind(Exclude = "AccountElementID")]AccountElement accountElement)
        {
            accountElement.AccountID = 1;


            bool bol = TryUpdateModel(accountElement, new[] { "AccountID" });
            if (ModelState.IsValid)
            {
                LoadUserControls();
                return View(accountElement);
            }
            else
            {
                LoadUserControls();
                return View(accountElement);
            }
        }

Re: TryUpdateModel not working in ASP.NET MVC 1

Support for DataAnnotations in new in MVC 2.

Re: TryUpdateModel not working in ASP.NET MVC 1

how would i achive this in ASP.NET MVC 1. any work around????

ASP.NET MVC 2 beta -- TryUpdateModel not working

bradwil as suggested by you i tried the model binding in ASP.net MVC 2 , but still not working.

[MetadataType(typeof(PersonMetaData))]
    public class Person
    {
        public int PersonID { get; set; }
        public string Name { get; set; }
    }


    public class PersonMetaData
    {
        [Required]
        [Range(1, 100)]
        public int PersonID { get; set; }




        [Required]
        [StringLength(4)]
        public string Name { get; set; }
    }

 [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create(Person person)
        {
            if (person.PersonID < 1)
                person.PersonID = 1;

            TryUpdateModel(person);
            if (ModelState.IsValid)
            {
                return View(person);
            }
            else
            {
                return View(person);
            }
        }

Please note in my Controller I am trying to change the value of person.Person=1 when the form input value is less than 1. But the validationstill fails. How do i update the model values before it does the validtion. quick response would be much appriciated. thanks.

Re: ASP.NET MVC 2 beta -- TryUpdateModel not working

Validation fails because you're running it twice: once for the Person parameter, and once with the call to TryUpdateModel. The first time you're running the validation, it's failed because of the bad ID value.

Re: ASP.NET MVC 2 beta -- TryUpdateModel not working

if the first time validation is failing because of the bad PersonID value, how I change the bad PersonID value in the Action BEFORE it gets validated.

I tried removing TryUpdateModel but the Validation still fails. Thanks .

[AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create(Person person)
        {


            if (person.PersonID < 1)
                person.PersonID = 1;


            if (ModelState.IsValid)
            {
                return View(person);
            }
            else
            {
                return View(person);
            }


        }

Re: ASP.NET MVC 2 beta -- TryUpdateModel not working

That doesn't really seem like a logical thing to do. The user is entering bad data, so you want to fix it up with good data?

Anyway, you can get what you want by inserting a call to ModelState.Clear() before the call to UpdateModel, which will clear out all model state (values & errors). Or, if you just want to remove the errors for PersonID and not call the UpdateModel method the second time, you can call ModelState.Remove("PersonID").

Re: ASP.NET MVC 2 beta -- TryUpdateModel not working

Hi,

I am sorry that I can't find why you must use the 'TryUpdateModel'.

It seems that you want to create some objects and store them in database, so you can use the following code.

[AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create([Bind(Exclude = "Id")] Movie movieToCreate)
        {
            MoviesDBEntities _db = new MoviesDBEntities();
          

            if (!ModelState.IsValid)


                return View();
       

            _db.AddToMovieSet(movieToCreate);


            _db.SaveChanges();
        

            return RedirectToAction("Index");




        }

Regarding the validation, I think you can validate data on the client with jquery.

http://weblogs.asp.net/cibrax/archive/2008/08/01/combining-jquery-validation-with-asp-net-mvc.aspx