data-annotations

问题 I would like to use data annotations on my classes and entities in a Windows Forms application. I use windows DataGridViews and Infragistics UltraGrids. I have previously successfully used the [DisplayName("Name to Display")] attribute to set the column header text on a DataGridView/UltraGrid. This is very beneficial, because I may have several grids displaying this class, and instead of configuring each grid to display the appropriate header text, I can simply set one data annotation. I'd

问题 Putting simple Data Annotations on properties is great, public class UnicornViewModel { [Required] public string Name { get; set; } But lets say I'm have something like this: public class SuperPower { public class Name { get; set; } } public class UnicornViewModel { [Required] public string Name { get; set; } public SuperPower PrimarySuperPower { get; set; } public SuperPower SecondarySuperPower { get; set; } How do I apply the Required attribute on PrimarySuperPower.Name while leaving it

问题 In my MVC application, I have an entity relation between Student and Lookup tables with StatusID-LookupKey and GenderID-LookupKey pairs inestead of (StatusID-ID and GenderID-ID pairs). However, not being able to define the LookupKey column as the matching parameter with the StatusID and GenderID, I have to use ID column of Lookup table. How can I use InverseProperty and match the related columns to the LookupKey column? Thanks in advance. Here are the Lookup table and the entities below:

问题 Is there a way to do what this question is doing (Either Or Required Validation) but instead of applying it on the entire class, I only want to apply the validation on two specific fields within the class. For example public class FooModel { [Required] public string Name { get; set; } [Required] public decimal Cost { get; set; } public int Bar1 { get; set; } public float Bar2 { get; set; } } I only want to constrain Bar1 and Bar2 to be an either/or requirement. They cannot both be null. Is

问题 I'm trying to create a custom attribute to control formatting in a custom HTML helper object. The source code for my custom selector class is (Code is from http://forums.asp.net/t/1649193.aspx/1/10). public static MvcHtmlString DdUovFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> selectList, string optionLabel, IDictionary<string, object> htmlAttributes) { ModelMetadata metadata = ModelMetadata

问题 I'm trying to create a custom attribute to control formatting in a custom HTML helper object. The source code for my custom selector class is (Code is from http://forums.asp.net/t/1649193.aspx/1/10). public static MvcHtmlString DdUovFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> selectList, string optionLabel, IDictionary<string, object> htmlAttributes) { ModelMetadata metadata = ModelMetadata

问题 In a recent question posed here: ASP.NET MVC: Is Data Annotation Validation Enough? ...it was concluded that relying on data annotation validation (triggered by the model binder) was not enough to ensure that validation was always executed. We still need to add the same validation logic in the services layer (or somewhere else after ModelBinding happens). The unfortunately thing about this is that we will be duplicating our validation code (once with Data Annotations and again in the services

问题 Is there anyway to use DataAnnotations in MVC 3 to not allow HTML is used in a textbox? I see a way to allow using HTML (AllowHTMLAttribute) but what if i dont want the user to type any HTML in the textbox and want to warning him? Thanks :) 回答1: You have to write a custom RegularExpressionAttribute ... something like this: public class DisallowHTMLAttribute : RegularExpressionAttribute { public DisallowHTMLAttribute() : base(@"</?\w+((\s+\w+(\s*=\s*(?:"".*?""|'.*?'|[^'"">\s]+))?)+\s*|\s*)/?>"

问题 This question has to have been asked before, but I think the search terms are too generic for me to find the answer I'm looking for, so I'll ask it again. I have a model with an int property, and a range annotation. If the user enters something other than an int, the validation message responds with The value '<bad data>' is not valid for '<property name>' ... which is great, but I want to provide a bit more feedback, i.e., Expecting an integer value in this field. . Since this validation

问题 I have a model class Address { public int AddressID {get;set;} public string Street {get;set;} public string City {get;set;} public string State {get;set;} public int ZipCode {get;set;} } in my view, when I have @Html.LabelFor(model => model.Address) (assuming Address is a complex property inside another model) I get a label for every one of Address properties, so I get: AddressID: Street: City: State: ZipCode: problem is, I don't want the ID property to show up, I tried these two annotations