client side validation with dynamically added field

Question

I am using jQuery\'s unobtrusive validation plugin in with ASP.NET MVC. Any fields that are rendered on the server are properly validated.

However, if I dynamically

Answer 1

Here's a blog post you may find useful and that should put you on the right track. Extension method taken from there:

/// 
/// 
/// 

(function ($) {
  $.validator.unobtrusive.parseDynamicContent = function (selector) {
    //use the normal unobstrusive.parse method
    $.validator.unobtrusive.parse(selector);

    //get the relevant form
    var form = $(selector).first().closest('form');

    //get the collections of unobstrusive validators, and jquery validators
    //and compare the two
    var unobtrusiveValidation = form.data('unobtrusiveValidation');
    var validator = form.validate();

    $.each(unobtrusiveValidation.options.rules, function (elname, elrules) {
      if (validator.settings.rules[elname] == undefined) {
        var args = {};
        $.extend(args, elrules);
        args.messages = unobtrusiveValidation.options.messages[elname];
        $('[name="' + elname + '"]').rules("add", args);
      } else {
        $.each(elrules, function (rulename, data) {
          if (validator.settings.rules[elname][rulename] == undefined) {
            var args = {};
            args[rulename] = data;
            args.messages = unobtrusiveValidation.options.messages[elname][rulename];
            $('[name="' + elname + '"]').rules("add", args);
          }
        });
      }
    });
  }
})($);

and then:

var html = ";
$("form").append(html);

$.validator.unobtrusive.parseDynamicContent('form input:last');

Updated to add fix referenced in blog post comments, otherwise js errors occur.