MVC data annotation to compare one property to another?

Question

I've been playing around data annotations in MVC2 and am curious if there is an annotation to compare 2 properties (ie. password, confirm password)?

Answer 1

Here you go: http://www.dotnetguy.co.uk/post/2010/01/09/Property-Matching-With-Data-Annotations.aspx
Edit: New link: http://www.dotnetguy.co.uk/post/2010/01/09/property-matching-with-data-annotations/

Answer 2

If you are using ASP.Net MVC 3, you can use System.Web.Mvc.CompareAttribute

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

[Required]
[DataType(DataType.Password)]
[Compare("Password")]
public string PasswordConfirm { get; set; }

Answer 3

System.Web.Mvc.CompareAttribute has been deprecated.

I was able to modify to work like this:

    [Required]
    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [System.ComponentModel.DataAnnotations.Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }

Answer 4

There's not one built in, however, you can make your own. See this link, which shows the "PropertiesMustMatchAttribute" that does just what you're looking for.