ASP.NET MVC AJAX请求未正确触发

我不明白为什么这个Ajax请求没有正确触发。为了简单起见,我一直尝试使用 this tutorial . 但是,我无法让我的控制器识别请求是这样的。我尝试将ajax.actionLink放在要更新的DIV中(在这里是它的外部)。

使用response.write放置日期时间,DIV中的日期时间将得到更新,而目标DIV之外的日期时间将不会得到更新(如预期)。我不太熟悉MS Ajax库的工作原理,但表面上它似乎在更新页面的正确部分,但我的控制器无法识别请求类型,因此输出的信息不正确。

...
    <script src="../../Scripts/MicrosoftAjax.js" type="text/javascript"></script>
    <script src="../../Scripts/MicrosoftMvcAjax.js" type="text/javascript"></script>
    <script src="../../Scripts/jquery-1.2.6.min.js" type="text/javascript"></script>

</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <div class="chart" id="divChart">
        <% Html.RenderPartial("GraphView", Model); %>
        <br />
        <% Response.Write(DateTime.Now); %>
        <br />
    </div>
    <%= Ajax.ActionLink("no parameters", "MyWorkouts", new AjaxOptions{ UpdateTargetId = "divChart"}) %>
    <%= Ajax.ActionLink("id parameter", "MyWorkouts", new {chtype=1},new AjaxOptions { UpdateTargetId = "divChart", OnBegin = "beginContactList", OnSuccess = "successContactList", OnFailure = "failureContactList" })%>
    <%= Ajax.ActionLink("all parameters", "MyWorkouts", new {chtype=2, range=ViewData["daterangevalue"]},new AjaxOptions { UpdateTargetId = "divChart", OnBegin = "beginContactList", OnSuccess = "successContactList", OnFailure = "failureContactList" })%>
    <br />
    <% Response.Write(DateTime.Now); %>
    <h2>
...

然后我的行动结果看起来是…

[AcceptVerbs(HttpVerbs.Get)]
        public ActionResult MyWorkouts(int? chtype, int? range) {
            int dateRange = 3;

             // do some stuff here - left out for readability

            if (Request.IsAjaxRequest()) {
                if (range != null) {
                    dateRange = (int)range;
                }

            }

           //do some other stuff...

            if (Request.IsAjaxRequest()) {
                return PartialView("GraphView", workouts);
            } else {
                return View(workouts);
            }
        }

(一切都是默认的,因为这只是一个测试页,一旦我发现了它就可以实现)。因此,我不断地在目标分区内获得完整的视图。