data-annotations

I am writing a WPF application and I want to use Data Annotations to specify things like Required Fields, Range , etc. My ViewModel classes use the regular INotifyPropertyChanged interface and I can validate the entire object easily enough using the C# 4 Validator , but I would also like the fields to highlight red if they do not validate properly. I found this blog post here (http://blogs.microsoft.co.il/blogs/tomershamam/archive/2010/10/28/wpf-data-validation-using-net-data-annotations-part-ii.aspx) that talks about how to write your base view model to implement IDataErrorInfo and simply use

I created an inherited attribute like this in ASP.NET MVC3: public sealed class RequiredFromResourceAttribute : RequiredAttribute { public RequiredFromResourceAttribute(string errorResourceName, string errorResourceTypeName) { this.ErrorMessageResourceName = errorResourceName; this.ErrorMessageResourceType = Type.GetType(errorResourceTypeName); } } And use it like this: [RequiredFromResource("Title", "Resources.Resource, MyProject.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")] public string Title { get; set; } It didn't work and the MVC ignored it. Then I create a simpler class

Can I inherit the "password" data annotation in another class? public class AccountCredentials : AccountEmail { [Required(ErrorMessage = "xxx.")] [StringLength(30, MinimumLength = 6, ErrorMessage = "xxx")] public string password { get; set; } } The other class: public class PasswordReset : AccountCredentials { [Required] public string resetToken { get; set; } **["use the same password annotations here"]** public string newPassword { get; set; } } I have to use different models due to API call's, but like to avoid having to maintain two definitions for the same field. Thanks! Addition:

I have a WCF service that has a [DataContract] class defined in it. Each of the properties has the [DataMember] attribute and I have added a couple of Data Annotation attributes [Required] and [StringLength] to a couple of the properties. I then consume this service in an asp.net MVC application as a service reference. When I get a list of all the attributes using var attr= from prop in TypeDescriptor.GetProperties(instance).Cast<PropertyDescriptor>() from attribute in prop.Attributes.OfType<ValidationAttribute>() select attribute; I see none of the data annotations have come through. Is this

model [MetadataType(typeof(UserMetaData))] public class User { public int Id { get; set; } public string UserName { get; set; } } public class UserMetaData { public int Id { get; set; } [Required(ErrorMessageResourceType = typeof(Resources.ModelValidation), ErrorMessageResourceName = "UserNameRequired")] [LocalizedDisplayNameAttribute("UserName", NameResourceType = typeof(Resources.ModelValidation))] public string UserName { get; set; } } view @using (Html.BeginForm()) { <div> @Html.LabelFor(x => x.UserName) @Html.TextBoxFor(x => x.UserName) @Html.ValidationMessageFor(x => x.UserName) </div>

In Microsoft MVC 3.0,I have a class: public class Product{ public string Title {get;set;} } This class can be represent as Product or as Service , the only difference between them is just the field labels at View time. so I create two classes : public class ProductMetaData { [Display(Name = "Product")] public object Title { get; set; } } and public class ServiceMetaData { [Display(Name = "Service")] public object Title { get; set; } } How can I set these classes at runtime as MetadataType ? ------------------------ EDIT -------------------------- I found we can set/change metadata for a type

I am trying to figure out if there is a way to make sure that numeric only input is allowed using Data Annotations and Entity Framework. I am using the following code [Required] [DisplayName("Client No")] [Column("client_no", TypeName = "smallint")] public virtual Int16 Number { get; set; } I want this to be displayed using number class. In one place I use the following <input type="number" name="searchClientNo" class="numericOnly" /><br /> but in the entry form I am using @Html.EditorFor(m => m.Number, EditorTemplate.TextBox) where I have a custom made EditorFor with the following code <div

To render HTML in my edit view, I use the helper @Html.EditorForModel() . My model: [Required(ErrorMessage = "Campo obrigatório")] [Display(Name = "Nome completo")] public string Name { get; set; } [Required(ErrorMessage = "Campo é obrigatório")] [StringLength(100, ErrorMessage = "A {0} deve ter pelo menos {2} characteres.", MinimumLength = 6)] [DataType(DataType.Password)] [Display(Name = "Senha")] public string Password { get; set; } [DataType(DataType.Password)] [Display(Name = "Confirmar senha")] [Compare("Password", ErrorMessage = "A nova senha e a confirmação da senha não conincidem.")]

I am trying to understand what are the main differecnes between using [DataType(DataType.EmailAddress)] & [EmailAddress] . inside a model class:- public class MYViewModel { [DataType(DataType.EmailAddress)] OR [EmailAddress] public string Email { get; set; } i did a test and the two attributes will do the following:- will prevent users from adding invalud email address will display the value as "EmailTo:..." but i can not find any differences in respect to the functionality , of course if i use html.TextboxFor then the Datatype will not have any effect, while if i use html.EditorFor then the

Whats the difference between DataAnnotations and Application Validation Block? DataAnnotations is an attribute based model to 'annotate' your data and it is in the .NET framework itself. Its most obvious use is for validation, as ASP.NET MVC does for instance. Validation Application Block itself is a validation framework, created by the Microsoft P&P team, but it is not part of the .NET framework. It also contains attributes to 'annotate' your data and in its newest version (5.0) the attributes inherit from DataAnnotations, making it interchangeable with DataAnnotations to some extent.