Email model validation with DataAnnotations and DataType

Question

I have following model:

public class FormularModel
{
    [Required]
    public string Position { get; set; }
    [Required]
    [DataType(DataType.EmailAddre         


        

Answer 1

DataType attribute is used for formatting purposes, not for validation.

I suggest you use ASP.NET MVC 3 Futures for email validation.

Sample code:

[Required]
[DataType(DataType.EmailAddress)]
[EmailAddress]
public string Email { get; set; }

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If you happen to be using .NET Framework 4.5, there's now a built in EmailAddressAttribute that lives in System.ComponentModel.DataAnnotations.EmailAddressAttribute.

Answer 2

The DataAnnotationsExtensions project has an Email attribute that you can use.

Answer 3

I have looked at the source code (reverse engineered by Reflector) and DataType variants are actually not even implemented! (This was for DateType.Date)

So it is not going to work.

I would personally use RegexValidation for email.

---

For clarity, here is the implementation of IsValid in class DataTypeAttribute:

public override bool IsValid(object value)
{
    return true;
}

Answer 4

I think you need to add at html code one componente Html.ValidationMessageFor. This component shows the validation.

The code may be (using razor):

@Html.TextBoxFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)

try it.