Hello
to all! This is my first question here on stack overflow.
i need help on a problem i encountered during an
ASP.
NET MVC2 project i am currently working on.
I should note that I'm relatively new
to MVC design, so pls bear my ignorance.
Here goes :
I have a regular form on which various details about a person are shown. One of them is "Date of Birth". My view is like this
<div class="form-items">
<%: Html.Label("DateOfBirth", "Date of Birth:") %>
<%: Html.EditorFor(m => m.DateOfBirth) %>
<%: Html.ValidationMessageFor(m => m.DateOfBirth) %>
</div>
I'm using an editor template i found,
to show only the date correctly :
<%@ Control Language="C#" Inherits="System.
Web.Mvc.ViewUserControl<System.DateTime?>"%>
<%= Html.TextBox("", (Model.HasValue ? Model.Value.ToShortDateString() : string.Empty))%>
I used LinqToSql designer
to create my model from an sql database.
In order
to do some validation i made a partial class Person
to extend the one created by the designer (under the same namespace) :
[MetadataType(typeof(IPerson))]
public partial class Person : IPerson
{ //To create buddy class }
public interface IPerson
{
[Required(ErrorMessage="Please enter a name")]
string Name { get; set; }
[Required(ErrorMessage="Please enter a surname")]
string Surname { get; set; }
[Birthday]
DateTime? DateOfBirth { get; set; }
[Email(ErrorMessage="Please enter a valid email")]
string Email { get; set; }
}
I want
to make sure that a correct date is entered. So i created a custom DataAnnotation attribute
in order
to validate the date :
public class BirthdayAttribute : ValidationAttribute
{
private const string _errorMessage = "Please enter a valid date";
public BirthdayAttribute() : base(_errorMessage) { }
public override bool IsValid(object value)
{
if (value == null)
{
return true;
}
DateTime temp;
bool result = DateTime.TryParse(value.ToString(), out temp);
return result;
}
}
Well, my problem is this. Once i enter an incorrect date
in the DateOfBirth field then no custom message is displayed even if use the attribute like [Birthday(ErrorMessage=".....")]. The message displayed is the one returned from the db ie "The value '32/4/1967' is not valid for DateOfBirth.". I tried
to enter some break points around the code, and found out that the "value"
in attribute is always null when the date is incorrect, but always gets a value if the date is
in correct format. The same ( value == null) is passed also
in the code generated by the designer.
This thing is driving me nuts. Please can anyone help me deal with this?
Also if someone can tell me where exactly is the point of entry from the view
to the database. Is it related
to the model binder? because i wanted
to check exactly what value is passed once i press the "submit" button.
Thank you.
