This property: [System.Web.Mvc.HiddenInput(DisplayValue = false)] public int Id { get; set; } will be rendered as i.e. <input id=”Id” name=”Id” type=”hidden” value=”21″ /> when using Html.EditorForModel() or Html.EditorFor(m => m.Id)
Use the Range Attribute. Set minimum to 1 and maximum to int.MaxValue [Range(1, int.MaxValue, ErrorMessage = “Value for {0} must be between {1} and {2}.”)]
Here’s an alternative to the opt-in attribute approach. I believe this will traverse the object-graph properly and validate everything. public bool TryValidateObjectRecursive<T>(T obj, List<ValidationResult> results) { bool result = TryValidateObject(obj, results); var properties = obj.GetType().GetProperties().Where(prop => prop.CanRead && !prop.GetCustomAttributes(typeof(SkipRecursiveValidation), false).Any() && prop.GetIndexParameters().Length == 0).ToList(); foreach (var property in properties) { if (property.PropertyType == typeof(string) || … Read more
I posted this in my blog post: using System.ComponentModel.DataAnnotations; // model class public class Fiz { [Required] public string Name { get; set; } [Required] [RegularExpression(“.+@..+”)] public string Email { get; set; } } // in test class [TestMethod] public void EmailRequired() { var fiz = new Fiz { Name = “asdf”, Email = null … Read more
RequiredIf validation attribute I’ve written a RequiredIfAttribute that requires a particular property value when a different property has a certain value (what you require) or when a different property has anything but a specific value. This is the code that may help: /// <summary> /// Provides conditional validation based on related property value. /// </summary> … Read more
I would create a validator for both Server AND Client side. Using MVC and unobtrusive form validation, this can be achieved simply by doing the following: Firstly, create a class in your project to perform the server side validation like so: public class EnforceTrueAttribute : ValidationAttribute, IClientValidatable { public override bool IsValid(object value) { if … Read more
You could write a custom validation attribute: public class CombinedMinLengthAttribute: ValidationAttribute { public CombinedMinLengthAttribute(int minLength, params string[] propertyNames) { this.PropertyNames = propertyNames; this.MinLength = minLength; } public string[] PropertyNames { get; private set; } public int MinLength { get; private set; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { var properties = this.PropertyNames.Select(validationContext.ObjectType.GetProperty); var … Read more
Try tagging it with: [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = “{0:MM/dd/yyyy}”)]
You have to reference the assembly in which this namespace is defined (it is not referenced by default in the visual studio templates). Open your reference manager and add a reference to the System.ComponentModel.DataAnnotations assembly (Solution explorer -> Add reference -> Select .Net tab -> select System.ComponentModel.DataAnnotations from the list)
For any number validation you have to use different different range validation as per your requirements : For Integer [Range(0, int.MaxValue, ErrorMessage = “Please enter valid integer Number”)] for float [Range(0, float.MaxValue, ErrorMessage = “Please enter valid float Number”)] for double [Range(0, double.MaxValue, ErrorMessage = “Please enter valid doubleNumber”)]