Localizing DataAnnotations Custom Validation Attribute
- by Gabe G
Hello SO,
I'm currently working in an MVC 2 app which has to have everything localized in n-languages (currently 2, none of them english btw). I validate my model classes with DataAnnotations but when I wanted to validate a DateTime field found out that the DataTypeAttribute returns always true, no matter it was a valid date or not (that's because when I enter a random string "foo", the IsValid() method checks against "01/01/0001 ", dont know why).
Decided to write my own validator extending ValidationAtribute class:
public class DateTimeAttribute : ValidationAttribute
{
public override bool IsValid(object value)
{
DateTime result;
if (value.ToString().Equals("01/01/0001 0:00:00"))
{
return false;
}
return DateTime.TryParse(value.ToString(), out result);
}
}
Now it checks OK when is valid and when it's not, but my problem starts when I try to localize it:
[Required(ErrorMessageResourceType = typeof(MSG), ErrorMessageResourceName = "INS_DATA_Required")]
[CustomValidation.DateTime(ErrorMessageResourceType = typeof(MSG), ErrorMessageResourceName = "INS_DATA_DataType")]
public DateTime INS_DATA { get; set; }
If I put nothing in the field I get a localized MSG (MSG being my resource class) for the key=INS_DATA_Required but if I put a bad-formatted date I get the "The value 'foo' is not valid for INS_DATA" default message and not the localized MSG.
What am I misssing?
