Question

I am getting The value 'abc' is not valid for fieldName. as error message. which is default error message and i want to override it in easier way.
as of now what i have tried is listed below

• [RegularExpression(@"^\d+$",ErrorMessage="enter numeric value")]
• [Integer(ErrorMessageResourceType = typeof(appName.Resources.abc.Resource),
ErrorMessageResourceName = "error_numeric")]
• [RegularExpression("([1-9][0-9]*)")]

• Range(1,int.max,ErrorMessage="enter numeric value")
  
  but failed to change default error message.
  
  Suggest me the easiest possible way to do this.
  

     using System;
     using System.Collections.Generic;
     using System.Linq;
     using System.Web;
     using System.ComponentModel.DataAnnotations; 
     using System.Web.Mvc;
  
    namespace blueddPES.ViewModels
       {
       public class ContactViewModel
          {
           [Integer(ErrorMessage="sdfdsf")]
           public int? hp { get; set; }
          }
  

Answer 1

Easiest way is to use Data Annotations Extensions. It has some useful attributes for things like Integers, etc.

Or you could write your own, like in: How to change ‘data-val-number’ message validation in MVC while it generate by helper

Edit: Added complete sample after comments.

I created a sample vanilla MVC 3 project and then did the following:

1. Added NuGet package DataAnnotationsExtensions.MVC3

2. Added a Model class:

   public class IntegerSample
   {
       [Required(ErrorMessage="Dude, please fill something in!")]
       [Integer(ErrorMessage="Are you stupid? Just fill in numbers only!")]
       public int? TestValue { get; set; }
   }
   

3. Added a Home Controller:

   public class HomeController : Controller
   {
       //
       // GET: /Home/
       public ActionResult Index()
       {
           return View();
       }
   }
   

4. Added a Home View:

   @using (Html.BeginForm()) {
       @Html.ValidationSummary(true)
       <fieldset>
           <legend>IntegerSample</legend>
           <div class="editor-label">
               @Html.LabelFor(model => model.TestValue)
           </div>
           <div class="editor-field">
               @Html.EditorFor(model => model.TestValue)
               @Html.ValidationMessageFor(model => model.TestValue)
           </div>
           <p>
               <input type="submit" value="Save" />
           </p>
       </fieldset>
   }
   

I hope you get some more insights using this sample code. When I run this sample, it works just as you’d want to expect.