data-annotations

I have a POCO with a decimal property called SizeUS. I would like to use data annotations to format the display of the decimal in a view. My SizeUS property is only displaying 2 decimal places in my view and I want it to display 4 decimal places. What is the proper data annotation to accomplish this ? [DisplayFormat( ? )] public decimal SizeUS {get; set;} [DisplayFormat(DataFormatString="{0:#.####}")] See Custom Format Strings for formats and DisplayFormatAttribute for examples 来源： https://stackoverflow.com/questions/20848969/what-is-the-proper-data-annotation-to-format-my-decimal-property

I have been googling this non stop for 2 days now and can't find a single complete, ready to use, fully implemented t4 template that generates DataAnnotations. Do they even exist? I generate POCOs with the standard t4 templates. The actual database table has metadata that describes some of the validation rules, eg not null, nvarchar(25), etc. So all I want is a t4 template that can take my table and generate a POCO with DataAnnotations, eg public class Person { [Required] [StringLength(255)] public FirstName {get;set} } It is a basic and fundamental requirement, surely I can not be the first

[Required] [DisplayName("my date")] public DateTime? DateReg { get; set; } so if the user is going to pass in an invalid datetime value he will get this message "The value '02.07.201022' is not valid for my date." how can I translate/localize this message ? Add Messages.resx in App_GlobalResources and in Application_Start in Global.asax : DefaultModelBinder.ResourceClassKey = "Messages"; Then in the Messages.resx file you could define the following string: PropertyValueInvalid: The value {0} is invalid for the property {1} The key needs to be called PropertyValueInvalid . 来源： https:/

I want to use DataAnnotations to validate classes that implements some interfaces, and so I'm adding validation attributes to the interface, like this: public interface IUser { [Required] string Name { get; set; } [Display(Name = "Email Address")] [Required] string Email { get; set; } } It doesn't work when I try to use Validator.TryValidateObject . Is there any way to make this instead of having to write a custom TryValidateObject method? I'm surprised no one mentioned MetadataTypeAttribute . But yes, this works. [MetadataType(typeof(ICustomerMetaData))] public partial class Customer { }

I have a Subsonic3 Active Record generated partial User class which I've extended on with some methods in a separate partial class. I would like to know if it is possible to add Data Annotations to the member properties on one partial class where it's declared on the other Subsonic Generated one I tried this. public partial class User { [DataType(DataType.EmailAddress, ErrorMessage = "Please enter an email address")] public string Email { get; set; } ... } That examples gives the "Member is already defined" error. I think I might have seen an example a while ago of what I'm trying to do with