asp.net mvc - Validate Date in MM/dd/YYYY format in mvc

Question

I have declared a property in MVC info file like

  [Required(ErrorMessage = "End Date has not being entered")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}", ApplyFormatInEditMode = true)]
        [RegularExpression(@"^(0[1-9]|1[012])[/](0[1-9]|[12][0-9]|3[01])[/]d{4}$", ErrorMessage = "End Date should be in MM/dd/yyyy format")]
        public DateTime? ExpirationDate { get; set; }

But when I am entered a date in correct format like 5/13/2013. It stills show the errormessage that

End Date should be in MM/dd/yyyy format

What code I am missing or there is any other error with the above.

Answer 1

You can't validate dates with regular expression, use DateTime.TryParseExact to convert the string into a DateTime object. Regex will always miss subtleties such as leap years, etc.