data-annotations

I have created the following custom RegularExpressionAttribute [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)] public class AlphaNumericAttribute: RegularExpressionAttribute, IClientValidatable { public AlphaNumericAttribute() : base("^[-A-Za-z0-9]+$") { } public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) { yield return new ModelClientValidationRule { ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()), ValidationType = "alphanumeric" }; } } The field in the ViewModel is

Quick question... If I put a notation in the Interface... Say [Required] can I ommit that notation in the C# class for the property? i.e. can I... Interface IFoo { [Required] string Bar {get; set;} } Class Foo : IFoo { string Bar {get; set;} } or do I need to just not put the notation in the interface and do this... Interface IFoo { string Bar {get; set;} } Class Foo : IFoo { [Required] string Bar {get; set;} } Dan Teesdale Placing the Data Annotation in the interface won't work. In the following link there is an explanation as to why: http://social.msdn.microsoft.com/Forums/en-US/adonetefx

I am using Data Annotations to validate my Model in ASP.NET MVC. This works well for action methods that has complex parameters e.g, public class Params { [Required] string Param1 {get; set;} [StringLength(50)] string Param2 {get; set;} } ActionResult MyAction(Params params) { If(ModeState.IsValid) { // Do Something } } What if I want to pass a single string to an Action Method (like below). Is there a way to use Data Annotations or will I have to wrap the string into a class? ActionResult MyAction(string param1, string param2) { If(ModeState.IsValid) { // Do Something } } Tejs I don't believe

Why don't DataAnnotations work on public fields? Example: namespace Models { public class Product { [Display(Name = "Name")] public string Title; // { get; set; } } } public ActionResult Test() { return View(new Models.Product() { Title = "why no love?" }); } @Html.LabelFor(m => m.Title) // will return 'Title' if field, or 'Name' if property @Html.DisplayFor(m => m.Title) If Title is a field, then the Display attribute seems to have no effect. If Title is changed to a property, it works as expected as displays "Name". It would seem easy in this example to just change to a property, but I am

I am trying to leverage DataAnnotation values in ASP.NET MVC Index view. Interesting, code generator uses field names (eg., BlogPost) as opposed to Html.LabelFor(m => Model.ColumNames["BlogPost"]) or something similar (I made it up). Does it mean, that if the Model is IEnumerable (as in Index view), then it is not possible to get to the Display Name that is specified by DataAnnotation? Hard to believe... My code is currently a mix of MVC 2 and MVC 3, if it makes any difference. You should, at the very least, be able to get what you want by using a partial view (ascx for WebForms) or a Display