data-annotations

I'm a huge fan of asp.net 4.5 webforms model binding using data annotations. ascx: <asp:FormView ItemType="Contact" runat="server" DefaultMode="Edit" SelectMethod="GetContact" UpdateMethod="SaveContact"> <EditItemTemplate> <asp:ValidationSummary runat="server" ID="valSum" /> Firstname: <asp:TextBox runat="server" ID="txtFirstname" Text='<%#: BindItem.Firstname %>' /> Lastname: <asp:TextBox runat="server" ID="txtLastname" Text='<%#: BindItem.Lastname %>' /> Email: <asp:TextBox runat="server" ID="txtEmail" Text='<%#: BindItem.Email %>' /> <asp:Button ID="Button1" runat="server" Text="Save"

not sure why, but the data annotation in MVC3 insist on having constant values, which i just can't understand for things like error messages and display names. I love these annotations, they are so easy to use and so powerful, but what if you need to support multiple languages? Imagine i have the following model: public class Person { public string First_Name { get; set; } } If i dont change anything and use the CRUD views that MVC3 will build for me I get a label next to the text fields that says "First_Name", so i add the data annotation to change the display name like so: public class

I have a class with [Display(Name ="name")] set in the properties, and [Table("tableName"] in the top of the class. Now I'm using reflection to get some information of this class and I'm wondering if somehow I can add a [Display(Name ="name")] to the class itself. It will be something like [Table("MyObjectTable")] [Display(Name ="My Class Name")] <-------------- New Annotation public class MyObject { [Required] public int Id { get; set; } [Display(Name="My Property Name")] public string PropertyName{ get; set; } } Based on that article I referenced heres a complete example Declare Custom

if I add Data annotations to my ViewModel the value of the DateTime field is always {1/1/0001 12:00:00 AM}. ViewModel public class EditReleaseViewModel : BaseViewModel { [Display(Name = "ReleaseDate", ResourceType = typeof(SharedResource))] [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd.MM.yyyy HH:mm}")] [Required(ErrorMessageResourceName = "FieldRequired", ErrorMessageResourceType = typeof(SharedResource))] public DateTime ReleaseDate { get; set; } } The controller is very straightforward, if I remove the data annotation and use the default everything works fine.

In the code below, I need to set a foreign key constrant on ParentInfoAddProperties.ParentQuestionAnswersId so that it is dependent on ParentQuestionAnswers.Id (which is a Primary Key). I am attempting to do so using data annotations but Entity Framework 6 wants to create a new Foreign Key column in my ParentQuestionAnswers table which references the ParentInfoAddProperties.Id column not the ParentInfoAddProperties.ParentQuestionAnswersId column. I do not want Entity Framework to create a new foreign key column. I'd greatly appreciate if someone can explain what data annotations or (if

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 prevent Controller scaffolding or make them as hidden fields. I prefer for them to remain public but just

I am using ASP.NET MVC with DataAnnotations. I have created the following custom ValidationAttribute which works fine. public class StringRangeAttribute : ValidationAttribute { public int MinLength { get; set; } public int MaxLength { get; set; } public StringRangeAttribute(int minLength, int maxLength) { this.MinLength = (minLength < 0) ? 0 : minLength; this.MaxLength = (maxLength < 0) ? 0 : maxLength; } public override bool IsValid(object value) { //null or empty is <em>not</em> invalid string str = (string)value; if (string.IsNullOrEmpty(str)) return true; return (str.Length >= this

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. Where is the default string stored and how can I change it? Deriving your own attribute is a fair option