Validation - Get Display Name of the filed (property) in error message
also get display name of the filed in both client and server code
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1. Layout File
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>@ViewBag.Title - My ASP.NET Application</title>
@Styles.Render("~/Content/css")
@Scripts.Render("~/bundles/modernizr")
@Scripts.Render("~/Scripts/jquery-1.10.2.js")
@Scripts.Render("~/Scripts/jquery.validate.js")
@Scripts.Render("~/Scripts/jquery.validate.unobtrusive.js")
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
@Html.ActionLink("Application name", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li>@Html.ActionLink("Home", "Index", "Home")</li>
<li>@Html.ActionLink("About", "About", "Home")</li>
<li>@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>
@Html.Partial("_LoginPartial")
</div>
</div>
</div>
<div class="container body-content">
@RenderBody()
<hr />
<footer>
<p>© @DateTime.Now.Year - My ASP.NET Application</p>
</footer>
</div>
@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/jqueryval")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)
</body>
</html>
2. Customer class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
namespace MvcCustomValidation2.Models
{
public class Customer
{
[Display(Name = "First Name")]
[ValidateCorrespondingRequiredFields(new string[] { "LastName", "FirstName" })]
public string FirstName { get; set; }
[Display(Name = "Last Name")]
[ValidateCorrespondingRequiredFields(new string[] { "FirstName", "LastName" })]
public string LastName { get; set; }
public int Age { get; set; }
public int Salary { get; set; }
}
}
3. Validation file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Text.RegularExpressions;
using System.Web.Mvc;
using System.Reflection;
namespace MvcCustomValidation2.Models
{
public class ValidateCorrespondingRequiredFieldsAttribute: ValidationAttribute, IClientValidatable
{
private readonly string[] _fields;
public ValidateCorrespondingRequiredFieldsAttribute(string[] fields)
{
_fields = fields;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
PropertyInfo propertyFirst = validationContext.ObjectType.GetProperty(_fields[0]);
PropertyInfo propertySecond = validationContext.ObjectType.GetProperty(_fields[1]);
var valueFirst = propertyFirst.GetValue(validationContext.ObjectInstance, null);
var valueSecond = propertySecond.GetValue(validationContext.ObjectInstance, null);
if(valueFirst != null && valueSecond == null)
{
return new ValidationResult(validationContext.DisplayName + " cannot be empty");
}
return null;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ValidationType = "validatecorrespondingrequiredfields",
ErrorMessage = metadata.GetDisplayName() + " cannot be empty"
};
rule.ValidationParameters.Add("fields", string.Join(",", _fields));
yield return rule;
}
}
}
4. Home controller after modifications
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcCustomValidation2.Models;
namespace MvcCustomValidation2.Controllers
{
public class HomeController : Controller
{
public ActionResult Test()
{
return View();
}
[HttpPost]
public ActionResult Test(Customer c)
{
if (ModelState.IsValid)
{
// do something here
}
return View(c);
}
public ActionResult Index()
{
return View();
}
public ActionResult About()
{
ViewBag.Message = "Your application description page.";
return View();
}
public ActionResult Contact()
{
ViewBag.Message = "Your contact page.";
return View();
}
}
}
5. View
@model MvcCustomValidation2.Models.Customer
@{ Html.EnableClientValidation();}
@using (Html.BeginForm(null, null, FormMethod.Post))
{
@Html.AntiForgeryToken()
@Html.LabelFor(x => x.FirstName)
@Html.TextBoxFor(x => x.FirstName)
<br />
@Html.LabelFor(x => x.LastName)
@Html.TextBoxFor(x => x.LastName)
<br />
@Html.LabelFor(x => x.Salary)
@Html.TextBoxFor(x => x.Salary)
<br />
@Html.ValidationSummary(String.Empty)
<input type="submit" value="Click Me" />
}
@section Scripts{
<script type="text/javascript">
$.validator.unobtrusive.adapters.add("validatecorrespondingrequiredfields", ["fields"], function (options) {
var element = options.element;
var otherNames = options.params.fields.split(',');
var fields = [];
$.each(otherNames, function (index, item) {
fields.push(ElementDetails.getElementDetails(element, item))
});
options.rules['validatecorrespondingrequiredfields'] = { fields: fields };
options.messages['validatecorrespondingrequiredfields'] = options.message;
});
$.validator.addMethod("validatecorrespondingrequiredfields", function (value, element, params) {
if ($(element).val() != '') {
return true;
}
var isValid = true;
$.each(params.fields, function (index, item) {
if ($(this).val() != '') {
isValid = false;
}
});
return isValid;
});
ElementDetails = {
getElementDetails: function (validationElement, item) {
var retElement = $('#' + item);
if (retElement.length === 1) {
return retElement;
}
var name = validationElement.name;
var index = name.lastIndexOf(".") + 1;
var id = (name.substr(0, index) + item).replace(/[\.\[\]]/g, "_");
retElement = $('#' + id);
if (retElement.length === 1) {
return retElement;
}
return null;
}
}
</script>
}
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