使用非侵入式验证来验证动态添加的字段集时出现问题

Question

I am currently working on a site that needs to dynamically add views/change views based on user input. Depending on what the user selects in a drop-down box, I render a partial view on the page. For most of the views, this works; however, I have one partial view that has the option to generate multiple field-sets. Unobtrusive validation works when there is only one field-set (read: the user does not select the option to add more), but when the user generates more field-sets, validation only fires for the first set. After looking around here for a bit, I found Xhalent's post regarding dynamic unobtrusive validation, as well as a post that gave me the logic to actually duplicate the field-set. Unfortunately, I am pretty new (bad) at JS/jQuery, and have yet to figure out how to get the two ideas to mesh well.

Here is the jQuery code I use to duplicate the form fields (I did not include the actual fields because this is really a conceptual problem, and what the fields are is irrelevant at this point. Plus I don't really understand how to format them here):

$(document).ready(function () {
    $("#itemCountSec1").change(function () {
        var itemCountVal = jQuery(this).val();
        $("#Section1Fields").fieldsManage(itemCountVal);

    });
});  

(NOTE: itemCountVal is a user-selected number 1-6)

Here is the function that I have saved in a JS file (Dupe.js):

jQuery.fn.fieldsManage = function (number) {
var ele = $(this);
var clones = ele.data("clones");
clones = clones ? clones : new Array(ele.attr("id"));
if (clones.length < number) {
    var clone;
    while (clones.length < number) {
        clone = ele.clone(true);
        var id = clones[0] + clones.length;
        clone.attr("id", id);
        $("#" + clones[clones.length - 1]).after(clone);
        $.validator.unobtrusive.parseDynamicContent(clone);
        clones.push(id);
        clone.find("input").each(function () { jQuery(this).val("") });
    }
} else {
    while (clones.length > number) {
        $("#" + clones.pop()).remove();
    }
}
ele.data("clones", clones);

}

Here is Xhalent's modified unobtrusive JS code, which i saved in another JS file (validex.js):

(function ($) {
$.validator.unobtrusive.parseDynamicContent = function (selector) {
    //use the normal unobstrusive.parse method
    $jQuery.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];
            //edit:use quoted strings for the name selector
            $("[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];
                    //edit:use quoted strings for the name selector
                    $("[name='" + elname + "']").rules("add", args);
                }
            });
        }
    });
} })($);  

I know that this:

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

Or some variant of this, has to go somewhere, but I am at a loss.

The question: How can I incorporate Xhalent's fine validation method into my code that duplicates the fieldset?

EDIT:

Here are the scripts referenced on the page (Section 1.cshtml):

<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>  
<script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.js")" type="text/javascript"></script>  
<script src="@Url.Content("~/Scripts/Dupe.js")" type="text/javascript"></script>  

Here is the form to be duplicated:

@using (Html.BeginForm("Section1","P15",FormMethod.Post))
{
@Html.ValidationSummary(true)
<fieldset>
<legend>FILL ME OUT FIRST!</legend>
    <div class="PrimaryOPSelector">
        OP Number (This is your Primary OP, or the OP that you would be changing shifts from):
    </div>
    <div class="editor-field">
        @Html.DropDownListFor(model => model.OP_Number, new SelectList(Model.Ops, "Op_Number", "Op_Number"))
        @Html.ValidationMessageFor(model => model.OP_Number)
    </div>
<p>Please select the number of shifts you would like to have off/change with another staff member: <select id="itemCountSec1" name="itemCountSec1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></p>
<div class="ReasonForRequest">
        Please Select The Reson For Your Request For Time Off:
    </div>
    <div class="editor-field">
        @Html.DropDownListFor(model => model.Reason_For_Request, new SelectList(Model.ReasonsForRequest, "Reason_ID", "Reason_For_Request1"))
        @Html.ValidationMessageFor(model => model.Reason_For_Request)
    </div>
</fieldset>  
<fieldset id="Section1Fields">

       <p><strong>Shift Start Date: </strong>@Html.DropDownListFor(model => model.Month, new SelectList(Model.Months, "Month_Value", "Month_Name"))
        @Html.DropDownListFor(model => model.Day, new SelectList(Model.Days))
        @Html.DropDownListFor(model => model.Year, new SelectList(Model.Years))</p>

<p><strong>Start Time Of Shift: </strong>
@Html.DropDownListFor(model =>model.Start_Hour, new SelectList(Model.Hours)) :
@Html.DropDownListFor(model => model.Start_Min, new SelectList(Model.Minutes))
@Html.DropDownListFor(model => model.Start_Marker, new SelectList(Model.AMPM))
</p>


<p><strong>End Time Of Shift: </strong>
@Html.DropDownListFor(model => model.End_Hour, new SelectList(Model.Hours)) :  
@Html.DropDownListFor(model => model.End_Min, new SelectList(Model.Minutes))
@Html.DropDownListFor(model => model.End_Marker, new SelectList(Model.AMPM))
</p>


<p><strong>Covering Staff Employee Number: </strong>@Html.EditorFor(model => model.Covering_Staff_Employee_Num)</p>
@Html.ValidationMessageFor(model => model.Covering_Staff_Employee_Num)

<p><strong>Covering Staff Phone Number: </strong>@Html.EditorFor(model => model.Covering_Staff_Phone)</p>
@Html.ValidationMessageFor(model => model.Covering_Staff_Phone)

<p><strong>Type Of Time Off: </strong>@Html.DropDownListFor(model => model.Type_Of_Time_Off, new SelectList(Model.Types, "Type_ID", "Name"))</p>
@Html.ValidationMessageFor(model => model.Type_Of_Time_Off)

<p><strong>Number Of Hours To Be Used: </strong>@Html.EditorFor(model => model.Hrs_Used)</p>
@Html.ValidationMessageFor(model => model.Hrs_Used)
</fieldset>

<p><input type="submit" value="Submit this section" /></p>
}

Answer 1

Rather than using such a complicated method, instead you can use the following three lines of code in the function called after your dynamic content is loaded:

$("form").removeData("validator");
$("form").removeData("unobtrusiveValidation");
$.validator.unobtrusive.parse("form");

This will clear out the previous parsed content from the page, allowing all content on the page to be parsed again, and validation to be applied to all elements.