CODEWITHSUNDEEP
c#asp.netasp.net-mvc
Bé Vú Sữa 1
Bé Vú Sữa 1

Reputation: 325

where are validation messages coming from?

In a newly created MVC project, in the Account Register page, if I don't fill in any information and click Register button, I will see

•The User name field is required.

•The Password field is required.

Where are these coming from ?

Upvotes: 2

Views: 179

Answers (3)

Forty-Two
Forty-Two

Reputation: 7605

The actual message string is stored in a MvcHtmlString object in System.Web.Mvc.ModelStateDictionary. It is the return value on the ValidationExtensions method called by the ValidationMessageFor() helper method that is invoked in the view.

Upvotes: 2

Maximc
Maximc

Reputation: 1762

If you take a look at the Register ActionResult (in AccountController.cs)

  [HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid) // here it will check it lal
            {
                // Attempt to register the user
                try
                {
                    WebSecurity.CreateUserAndAccount(model.UserName, model.Password);
                    WebSecurity.Login(model.UserName, model.Password);
                    return RedirectToAction("Index", "Home");
                }
                catch (MembershipCreateUserException e)
                {
                    ModelState.AddModelError("", ErrorCodeToString(e.StatusCode));
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

You see the ModelState.IsValid, basicly it checks or the model has any validations issues.

The model can be found in AccountModels

public class RegisterModel
{
    [Required]
    [Display(Name = "User name")]
    public string UserName { get; set; }

    [Required]
    [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }
}

As you can see they both got a require tag so they will return false and display next to it that it is required (when it is not filled in)

EDIT: Since you want to know why it is that text and not some other text, it is the default text so ask microsoft :), anyway you can modify the text as you like by adding the ErrorMessage parameter to the Required tag.

Example:

[Required(ErrorMessage = "Hey you forgot me!")]

Upvotes: 4

Mark S
Mark S

Reputation: 869

look in the assiciated model for [required] at the top.

Upvotes: 0

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