1: public class SignUpViewModel

   2: {

   3:     [Required]

   4:     public string Password { get; set; }

   5:  

   6:     [EqualTo("Password", ErrorMessage="Passwords do not match.")]

   7:     public string RetypePassword { get; set; }

   8: }

   9: public class EventViewModel

  10: {

  11:     [Required]

  12:     public string Name { get; set; }

  13:  

  14:     [Required]

  15:     public DateTime Start { get; set; }

  16:  

  17:     [Required]

  18:     [GreaterThan("Start")]

  19:     public DateTime End { get; set; }

  20: }

   1: [Is]

   2: [EqualTo]

   3: [NotEqualTo]

   4: [GreaterThan]

   5: [LessThan]

   6: [GreaterThanOrEqualTo]

   7: [LessThanOrEqualTo]

   1: private class Person

   2: {

   3:     [Required]

   4:     public string FirstName { get; set; }

   5:  

   6:     [Required]

   7:     public string LastName { get; set; }

   8:  

   9:     public bool Married { get; set; }

  10:  

  11:     [RequiredIfTrue("Married")]

  12:     public string MaidenName { get; set; }

  13: }

   1: [RequiredIf]

   2: [RequiredIfNot]

   3: [RequiredIfTrue]

   4: [RequiredIfFalse]

   5: [RequiredIfEmpty]

   6: [RequiredIfNotEmpty]

   7: [RequiredIfRegExMatch]

   8: [RequiredIfNotRegExMatch]

   1: <script src="../../Scripts/MicrosoftAjax.js" type="text/javascript"></script>

   2: <script src="../../Scripts/MicrosoftMvcAjax.js" type="text/javascript"></script>

   3: <script src="../../Scripts/MicrosoftMvcValidation.js" type="text/javascript"></script>

   4: <script src="../../Scripts/MvcFoolproofValidation.js" type="text/javascript"></script>

   1: <script src="../../Scripts/jquery.js" type="text/javascript"></script>

   2: <script src="../../Scripts/jquery-validate.js" type="text/javascript"></script>

   3: <script src="../../Scripts/MicrosoftMvcJQueryValidation.js" type="text/javascript"></script>

   4: <script src="../../Scripts/MvcFoolproofJQueryValidation.js" type="text/javascript"></script>

   1: public class RoleValidInDepartmentAttribute : ModelAwareValidationAttribute

   2: {

   3:     //this is needed to register this attribute with foolproof's validator adapter

   4:     static RoleValidInDepartmentAttribute() { Register.Attribute(typeof(RoleValidInDepartmentAttribute)); }

   5:  

   6:     public override bool IsValid(object value, object container)

   7:     {

   8:         if (value != null && value.ToString() == "Software Developers")

   9:         {

  10:             //if the role was software developers, we need to make sure the user is in the IT department

  11:             var model = (CreateUserViewModel)container;

  12:             return model.Department == "IT Department";

  13:         }

  14:  

  15:         //the user wasn't in a constrained role, so just return true

  16:         return true;

  17:     }

  18: }

   1: public class CreateUserViewModel

   2: {

   3:     [Required]

   4:     public string Username { get; set; }

   5:  

   6:     [Required]

   7:     public string Department { get; set; }

   8:  

   9:     [Required]

  10:     [RoleValidInDepartment(ErrorMessage="This role isn't valid for the selected department.")]

  11:     public string Role { get; set; }

  12: }