data-annotations

问题 With asp.net mvc you can use the annotation [Required (errormessage="This is required")] How can I create something like this: [Required (errormessage="ERRORXX")] So I can look up in a database what this ERRORXX is and display it on my form. Now my form displays ERRORXX. How can I create something that solves my problem? Thx! 回答1: Just an idea: why not pull the error messages from a resx file? I think this is the common way of doing this. It even allows you to localize your error messages

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed last year . Better approach to define Data annotation in entity or view model ? I have entity and view model for the same entity and override the class with Data Annotation of entity framework. The question is i can add them without creating a separate model however i have concern about

问题 The problem is that in ApiController ModelState.IsValid is always true if I use .rsx file (Resources) to provide custom error message. Here is my model: public class LoginModel { public string Email { get; set; } [Required] [MinLength(5)] public string Password { get; set; } } Method in ApiController: [HttpPost] [ModelValidationFilter] public void Post(LoginModel model) { var a = ModelState.IsValid; } And the filter: public class ModelValidationFilterAttribute : ActionFilterAttribute { public

问题 When I put [Required] attribute on my ViewModel's property MVC3 automatically generate error messages like: The Price field is required. My site's single language is Russian, so I want to have localized error messages. I can localize field's name with [Display(Name = "blablabla")] , but how can I localize the field is required part? Update: I know, that I can change an error message for concrete field by specifying it [Required(ErrorMessage = "blablabla")] , is there a way I can change it in

问题 I want to do something like this: [Display(Name = "Plain text. <span class=\"red strong\">Red text bolded.</span>")] Is this possible (to style the text within the Display Attribute)? Currently it is just displaying the literal text. 回答1: Is this possible (to style the text within the Display Attribute)? The problem doesn't lie within the [Display] attribute. It lies within the Html.LabelFor helper which you used to display. This attribute always HTML encodes the value. If you don't like this

问题 So in my mvc project's Project.Repository I have [MetadataType(typeof(FalalaMetadata))] public partial class Falala { public string Name { get; set; } public string Age { get; set; } internal sealed class FalalaMetadata { [Required(ErrorMessage="Falala requires name.")] public string Name { get; set; } [Required(ErrorMessage = "Falala requires age.")] public string Age { get; set; } } } I use Falala as a model in my Project.Web.AccountControllers, and use a method to get violations.

问题 I have a class in my model in MVC: public class NewModel { public bool AllComplexes { get; set; } public int UserID { get; set; } public int? RoleID { get; set; } public int ComplexID { get; set; } [Required(ErrorMessage = "Please enter a user name."), StringLength(50)] public string Username { get; set; } [Required(ErrorMessage = "Please enter Password"), StringLength(100, ErrorMessage = "Password cannot be longer than 100 characters")] public string Password { get; set; } [Compare("Password

问题 Is it possible to define a many-to-many relationship in Entity Framework 4.1 (Code First approach) using Data Annotations only, without model builder? For example, something like: Product = { Id, Name, ... } Category = { Id, Name, ... } ProductCategory = { ProductId, CategoryId } You get the picture. I don't want to have an intermediate entity ProductCategory in the context with two many-to-ones since I don't have any additional data, just the two FKs. Also, I should be able to define table

问题 I am using Entity Framework in my ASP.NET MVC 4.0 application and I want to know how to prevent or hide fields from my entity from being generated in my strongly typed view? Right now several primary key fields and timestamp fields are being generated on the view which I do not want. I know setting the property to internal as opposed to public works but I am not sure of the total downstream effect this will have. I prefer to use data annotations on the properties but the ones I have tried

问题 When you decorate a model object's property with the Required attribute and don't specify ErrorMessage or ResourceType/Name you get the validation message in the interpolated form of "The {0} field is required.", where param 0 is the value of the DisplayName attribute of that property. I want to change that default string to something else but I want to keep the generic nature of it, that is I don't want to specify ErrorMessage or ResourceType/Name for every property of the model object.