.NET (Core and Framework)

@Html.ActionLink("Select 3 Dates", "Create3")

//submit will go to post
   [HttpPost]
   public ViewResult Index(int HolidayDate)
   {
       var holidays = db.Holidays.Include("Person");

       HolidayList model = new HolidayList();

       model.currentPersonID = HolidayDate;
       model.PList4DD = db.People.ToList();
       model.Categories = holidays.Select(x => new SelectListItem
                                       {
                                           Value = x.Id.ToString(),
                                           Text = x.Person.Name
                                       }
                                     );


       int data = HolidayDate;

       model.HList4DD = db.Holidays.Where(h => h.PersonId == HolidayDate).ToList();

       return View(model);

   }

   [HttpGet]
   public ViewResult Index(string sortOrder, int? currentPersonID)
   {
       var holidays = db.Holidays.Include("Person");

       HolidayList model = new HolidayList();

       //not null
       if (currentPersonID.HasValue)
       {
           model.currentPersonID = currentPersonID.Value;

       }
       else
       {
           model.currentPersonID = 0;
       }

       model.PList4DD = db.People.ToList();

       ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "date" : "";
       var dates = from d in db.Holidays
                   where d.PersonId == currentPersonID.Value
                   select d;

       switch (sortOrder)
       {
           case "date":
               dates = dates.OrderBy(p => p.HolidayDate);
               break;
       }

       model.HList4DD = dates.ToList();

       return View(model);
   }

//View for Index

@*@model IEnumerable<HolidayBookingApp.Models.Holiday>*@
@model HolidayBookingApp.Models.HolidayList
@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>

<p>
@Html.ActionLink("Select 3 Dates", "Create3")
</p>

<table>
    <tr>
        <th>
            PersonId
        </th>
        <th>
            @*HolidayDate*@
            @Html.ActionLink("HolidayDate", "Index", new { sortOrder = ViewBag.NameSortParm, currentPersonID = Model.currentPersonID })
        </th>
        <th></th>
    </tr>
    <tr>  
    </tr>

@foreach (var item in Model.HList4DD)
{
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.PersonId)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.HolidayDate)
           
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id = item.Id }) |
            @Html.ActionLink("Details", "Details", new { id = item.Id }) |
            @Html.ActionLink("Delete", "Delete", new { id = item.Id })
        </td>
    </tr>}
    
    <tr>
      <div class="editor-label">
         @*   @Html.LabelFor(model => model.PList4DD, "Person")*@
        </div>

        <div class="editor-field">           
             <form action ="/Holidays/Index" id="some" method="post"> 

  @Html.DropDownListFor(model => model.HList4DD.First().HolidayDate, new SelectList(Model.PList4DD, "Id", "Name", Model.currentPersonID), "--select--")    
       <script>
           function updateFormEnabled() 
           {
               if (verifyAdSettings()) 
               {
                   $('#sbmt').removeAttr('disabled');
               }
               else 
               {
                   $('#sbmt').attr('disabled', 'disabled');
               }
           }

           function verifyAdSettings() 
           {
               if ($('#HolidayDate').val() != '') 
               {
                   return true;
               }
               else 
               {
                   return false;
               }
           }

           $('#HolidayDate').change(updateFormEnabled);
      
           </script>
           
             <input type="submit" id= "sbmt" name="ViewHolidaysDD" value="View"/>
              </form>
  <script>
      $('#sbmt').attr('disabled', '');
        </script>

        </div>

</table>

<br />
<br />
<table>
    <div>
    Judging by your selection the order of dates are: //HERE IS WHERE I WANT TO DISPLAY THE ORDER OF DATES
    </div>

</table>

-----------------------------------
//my create 3 Action result


 [HttpGet]
        public ActionResult Create3()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Create3(string date1, string date2, string date3)
        {
            string FirstDateOrder, SecondDateOrder, ThirdDateOrder;
         
            //date 1 is biggest
            if (date1.Length > date2.Length && date1.Length > date3.Length)
            {
                //date 2 is 2nd & date 3 is 3rd
                if (date2.Length > date3.Length)
                {
                    FirstDateOrder = date1;
                    SecondDateOrder = date2;
                    ThirdDateOrder = date3;

                    System.Windows.Forms.MessageBox.Show("Order is 1, 2, 3");

                    return RedirectToAction("Index");
                }

                //date 3 is 2nd & date 2 is 3rd
                else
                {
                    FirstDateOrder = date1;
                    SecondDateOrder = date3;
                    ThirdDateOrder = date2;

                    System.Windows.Forms.MessageBox.Show("Order is 1, 3, 2");

                    return RedirectToAction("Index");
                }
              
            }

            //date 2 is biggest
            if (date2.Length > date1.Length && date2.Length > date3.Length)
            {
                //date 1 is 2nd & date 3 is 3rd
                if (date1.Length > date3.Length)
                {
                    FirstDateOrder = date2;
                    SecondDateOrder = date1;
                    ThirdDateOrder = date3;

                    System.Windows.Forms.MessageBox.Show("Order is 2, 1, 3");

                    return RedirectToAction("Index");
                }

                //date 3 is 2nd & date 1 is 3rd
                else
                {
                    FirstDateOrder = date2;
                    SecondDateOrder = date3;
                    ThirdDateOrder = date1;

                    System.Windows.Forms.MessageBox.Show("Order is 2, 3, 1");

                    return RedirectToAction("Index");
                }

            }

            //date 3 is biggest
            if (date3.Length > date1.Length && date3.Length > date2.Length)
            {
                //date 1 is 2nd & date 2 is 3rd
                if (date1.Length > date2.Length)
                {
                    FirstDateOrder = date3;
                    SecondDateOrder = date1;
                    ThirdDateOrder = date2;

                    System.Windows.Forms.MessageBox.Show("Order is 3, 1, 2");

                    return RedirectToAction("Index");
                }

                //date 2 is 2nd & date 1 is 3rd
                else
                {
                    FirstDateOrder = date3;
                    SecondDateOrder = date2;
                    ThirdDateOrder = date1;

                    System.Windows.Forms.MessageBox.Show("Order is 3, 2, 1");

                    return RedirectToAction("Index");
                }

            }

            
            return RedirectToAction("Index");
        }

--------------
and my view:

	@model HolidayBookingApp.Models.Dates

@{
    ViewBag.Title = "Create3";
}

<h2>Create3</h2>

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

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>Dates</legend>

        <div class="editor-label">
            @Html.LabelFor(model => model.date1)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.date1)
            @Html.ValidationMessageFor(model => model.date1)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.date2)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.date2)
            @Html.ValidationMessageFor(model => model.date2)
        </div>

        <div class="editor-label">
            @Html.LabelFor(model => model.date3)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.date3)
            @Html.ValidationMessageFor(model => model.date3)
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>"Index")


</div>