Change, override, replace, asp.net MVC 3 default DataAnnotations Validations messages for required and invalid values

Question

I have:

public class StudentDto
{
    [Display(Name = "Data de Nascimento")]
    public DateTime? Born { get; set; }
}

I'm using jQuery datepicker, and whenever I put an invalid data, the validation message is: Please enter a valid date.

How can i change this default message?

I've already tried using:

[DataType(DataType.Date, ErrorMessage = @"Valor inválido")]

I've already tried to create a .resx, and use DefaultModelBinder.ResourceClassKey = "Strings"; , and on my .resx created values for: InvalidPropertyValue, Common_ValueNotValidForProperty, PropertyValueInvalid

None of these worked.

Thanks!

Update: I'm using Unobtrusive validation too!

Darin Dimitrov · Accepted Answer · 2011-10-18 16:20:26Z

3

The following works fine for me:

Model:

public class StudentDto
{
    [Display(Name = "Data de Nascimento")]
    [Required(ErrorMessage = "Some custom message for required date")]  
    public DateTime? Born { get; set; }
}

Controller:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View(new StudentDto());
    }

    [HttpPost]
    public ActionResult Index(StudentDto dto)
    {
        return View(dto);
    }
}

View:

<script type="text/javascript">
    $(function () {
        $('#Born').datepicker();
    });
</script>

@using (Html.BeginForm())
{
    @Html.LabelFor(x => x.Born)
    @Html.EditorFor(x => x.Born)
    @Html.ValidationMessageFor(x => x.Born)
    <button type="submit">OK</button>
}

Application_Start in Global.asax:

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();

    RegisterGlobalFilters(GlobalFilters.Filters);
    RegisterRoutes(RouteTable.Routes);

    DefaultModelBinder.ResourceClassKey = "Strings";
}

and inside ~/App_GlobalResources/Strings.resx define the key PropertyValueInvalid which will be used if an invalid date is entered. For the value you could use the {0} and {1} placeholders which will be replaced respectively by the value and the display name of the field.

answered Oct 18, 2011 at 16:20

Darin Dimitrov

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6 Comments

renanleandrof Over a year ago

I cant understand... The required message works fine, but the Invalid data don't! I've done exactly the same thing as you told =/

Darin Dimitrov Over a year ago

@Renanlf, I created a new ASP.NET MVC 3 project from scratch and put the code you see in my answer at the correct locations. I've just referenced the jquery-ui.js in the _Layout for the datepicker to work. So what did you do differently than me if it doesn't work for you? Want me to send you a working copy of my project?

renanleandrof Over a year ago

Maybe my problem is with the unobtrusive ajax thing! Does your code work with unobtrusive??

Darin Dimitrov Over a year ago

@Renanlf, unobtrusive what? Validation? Ajax?

renanleandrof Over a year ago

Yeah! <add key="UnobtrusiveJavaScriptEnabled" value="true" /></appSettings>, and jquery.validate.unobtrusive.min.js

|

Bohdan Lyzanets · Accepted Answer · 2012-09-20 20:28:35Z

1

Use DefaultModelBinder.ResourceClassKey = "Strings"; for binding validation (forums.asp.net/post/3607981.aspx) and ClientDataTypeModelValidatorProvider.ResourceClassKey = "Strings"; for unobtrusive validation.

Strings - name of resource file located in App_GlobalResources folder (~/App_GlobalResources/Strings.resx).

edited Sep 20, 2012 at 20:28

answered Sep 20, 2012 at 20:12

Bohdan Lyzanets

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