Customize the Error Message MVC for an invalid DateTime in ASP.NET MVC4

Question

I am having trouble specifying the error message for the validation of a DateTime input value using data annotations in my model. I would really like to use the proper DateT

Answer 1

I found one simple workaround.

You can leave your model untouched.

[DataType(DataType.Date)]
public DateTime Date { get; set; }

Then override the 'data-val-date' attribute in a view.

@Html.TextBoxFor(model => model.Date, new
{
    @class = "form-control",
    data_val_date = "Custom error message."
})

Or if you want to parameterize your messages, you can just use static function String.Format:

@Html.TextBoxFor(model => model.Date, new
{
    @class = "form-control",
    data_val_date = String.Format("The field '{0}' must be a valid date.",  
                                    Html.DisplayNameFor(model => model.Date))
})

Similar with resources:

@Html.TextBoxFor(model => model.Date, new
{
    @class = "form-control",
    data_val_date = String.Format(Resources.ErrorMessages.Date,  
                                   Html.DisplayNameFor(model => model.Date))
})