私はそれをできるだけ単純に保つように努めました。
したがって、サンプルモデルを以下に示します。
namespace StackOverflow.Models
{
public class Choice
{
public int Id { get; set; }
public string Name { get; set; }
public Choice()
{
Id = 0;
}
public Choice(int id, string name)
{
Id = id;
Name = name;
}
}
}
namespace StackOverflow.Models
{
public class ExampleViewModel
{
public List<Choice> PrimaryChoiceList { get; set; }
public List<Choice> SecondaryChoiceList { get; set; }
public int SelectedChoiceId { get; set; }
public int SelectedAffiliateId { get; set; }
public ExampleViewModel()
{
SelectedChoiceId = 0;
SelectedAffiliateId = 0;
PrimaryChoiceList = new List<Choice>()
{
new Choice(1, "How are you?"),
new Choice(2, "How is the weahter?"),
new Choice(3, "What have you been doing so far?"),
new Choice(4, "What's up man?"),
new Choice(5, "Any news?"),
new Choice(5, "Bla bla bla")
};
SecondaryChoiceList = new List<Choice>()
{
new Choice(1, "How are you dear?"),
new Choice(2, "How is the weahter?"),
new Choice(3, "What have you been doing so far dear?"),
new Choice(4, "What's up man?"),
new Choice(5, "Any romantic news?")
};
}
}
}
サンプルコントローラー:
namespace StackOverFlow.Controllers
{
public class SOController : Controller
{
public static ExampleViewModel evm = new ExampleViewModel();
public ActionResult Index()
{
return View(evm);
}
public ActionResult SetSelection(int id)
{
evm.SelectedChoiceId = id;
if (evm.PrimaryChoiceList.Count() > 0)
{
Choice selection = evm.PrimaryChoiceList.ElementAt(id-1);
Choice affiliate = (Choice)evm.SecondaryChoiceList.FirstOrDefault(x => x.Name == selection.Name);
if (affiliate != null)
{
return Content("show");
}
else
{
return Content("hide");
}
}
else
{
return Content("hide");
}
}
}
}
そしてウェブページ:
@using StackOverflow2.Models;
@model ExampleViewModel
<script src="@Url.Content("~/Scripts/jquery-1.7.1.min.js")" type="text/javascript"></script>
@{
ViewBag.Title = "Stackoverflow Sample";
}
<h2>Index</h2>
<script type="text/javascript">
// Get the selection and make Ajax Request to the controller, action: SetSelection,
// which in turn may decide whetger you must show or hide the control
function updateSeconadryQuestion(id) {
var xmlhttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
if (xmlhttp.responseText == 'show')
$('#SecondaryQuestionDropBoxId').show();
else
$('#SecondaryQuestionDropBoxId').hide();
}
}
xmlhttp.open("GET", "/SO/SetSelection?id=" + id, true);
xmlhttp.send();
}
</script>
@Html.DropDownListFor(x => x.SelectedChoiceId, new SelectList(Model.PrimaryChoiceList, "Id", "Name", "Value"), new { id = "PrimaryQuestionDropBoxId", onchange = "updateSeconadryQuestion(value);" })
<div id="SeconadryQuestionDivId">
@Html.DropDownListFor(x => x.SelectedAffiliateId, new SelectList(Model.SecondaryChoiceList, "Id", "Name"), new { id = "SecondaryQuestionDropBoxId" })
</div>