data-annotations

Is there any way of using data annotations to compare two form field (eg. to confirm an email address) are the same, before allowing the form to be posted? eg. can the regular expression data annotation use the match function to reference another property in a ViewModel? Use the CompareAttribute public string EmailAddress {get; set;} [Compare(nameof(EmailAddress), ErrorMessage = "Emails mismatch")] public string VerifiedEmailAddress { get; set; } As one possibe option self-validation : Implement an interface IValidatableObject with method Validate , where you can put your validation code.

I recently used ASP.Net MVC with DataAnnotations and was thinking of using the same approach for a Forms project but I'm not sure how to go about it. I have set my attributes but they do not seem to get checked when I click Save. UPDATE: I have used Steve Sanderson's approach which will check for attributes on my class and return a collection of errors like so: try { Business b = new Business(); b.Name = "feds"; b.Description = "DFdsS"; b.CategoryID = 1; b.CountryID = 2; b.EMail = "SSDF"; var errors = DataAnnotationsValidationRunner.GetErrors(b); if (errors.Any()) throw new RulesException

There's a way to set the default resource to the data annotations validations? I don't wanna make something like this: [Required(ErrorMessage="Name required.", ErrorMessageResourceType=typeof(CustomDataAnnotationsResources)] public string Name { get; set; } I would like something like this: Global.asax DataAnnotations.DefaultResources = typeof(CustomDataAnnotationsResources); then [Required] public string Name { get; set; } someone gimme a light! thanks in advance EDIT My real problem was with EF Code First CTP4. CTP5 fix it. Thanks for everyone. You could try doing this: Add this class

I need to validate an input field value from user before the form is submitted. I have created an action in my custom controller and decorated the field with it: action name: CheckValue controller name: Validate [Remote("CheckValue", "Validate"), ErrorMessage="Value is not valid"] public string Value { get; set; } The problem is when I press submit, the form is being submitted and then the message Value is not valid is shown if the value entered by the user is not valid. How can I validate the value entered by user and prevent the form to be submitted if value is not valid, and display the

if I decorate the properties of my ViewModels with attributes like this: public class Vm { [Required] [StringLength(35)] public string Name {get;set;} } I am going to get english validation messages: "this field is required" "The field Name must be a string with a maximum length of 35" how could I translate them ? Darin Dimitrov You could use the ErrorMessageResourceName property: [Required(ErrorMessageResourceName = "SomeResource")] [StringLength(30, ErrorMessageResourceName = "SomeOtherResource")] public string Name { get; set; } You may checkout this blog post for an example. UPDATE: In