无法过滤net MVC中的视图数据

Question

我正在尝试过滤“语言”下拉列表中所选索引更改的“索引”视图数据。我已经编写了一个jquery代码来回发语言下拉列表的选定索引更改，它将调用“索引”操作方法，根据所选语言过滤数据。操作方法是将过滤后的数据返回到视图，但输出仍然是dafault数据（显示所有语言的所有结果。下面是我的代码。我在这里做错了什么？

我的行动方法：

[HttpGet]
    public ActionResult Index(string langId)
    {
        List<Movie> movies = new List<Movie>();
        if (langId != null)
        {
            movies = db.Movies.Where(p => p.Language == langId).ToList();
        }
        else
            movies = db.Movies.ToList<Movie>();
        ViewBag.Languages = GetLanguages();
        return View(movies);
    }

我的观点：

<script language="javascript" type="text/javascript">
	$(document).ready(function () {
		$("#drpLanguage").change(function () {
			debugger;
			var drpVal = this.value;
			$.ajax({
				type: 'GET',
				url: '@Url.Action("Index", "Movies")' ,
				data: { 'langId': $('#drpLanguage').val() },
				success: function (result) {	
					
				},
				error: function (ts) {
					debugger;
					alert(ts.responseText)
				}
			});
		//	e.preventDefault();
		});
	});
</script>

<script src='http://code.jquery.com/jquery-latest.min.js' type='text/javascript'></script>
@model IEnumerable<MVCMovies.Models.Movie>

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<div> Language:@Html.DropDownList("drpLanguage", new SelectList(ViewBag.Languages, Model), new { id = "drpLanguage" })</div>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.MovieName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Language)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.MovieName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Language)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.MovieId }) |
            @Html.ActionLink("Details", "Details", new { id=item.MovieId }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.MovieId })
        </td>
    </tr>
}

</table>