如何在MVC Razor视图中进行AJAX调用？

我有一个带有AJAX调用的Razor视图，它跳过了它。我在控制器方法上有一个调试断点。我永远不会到那里。另外，Alert iin启动脚本甚至都不会执行。

在这种情况下，我尝试将脚本移到第一段之前。没变化。

查看代码：

它进入switch语句-“ New”情况，但不执行Ajax调用。在调试中，它命中@Session [“ UserName”]，然后中断。

@Scripts.Render("~/bundles/jquery")
@Styles.Render("~/Content/css")

@switch (@Session["NavState"])
{
case "New":
    <br />
    <p>Hi <span class="username">@Session["UserName"]</span> !</p>
    <br />
    <p> I'm so glad you decided to join us. Feel free to look around.</p>

    <script type="text/javascript">
        $.post("UserProfile/SetSessionVar", { variable = "NavState" }, function () { });
    </script>

    break;
case "Exists":
    <br />
    <p>Welcome back <span class="username">@Session["UserName"]</span> !</p>
    <br />

    <script type="text/javascript">
        $.post("UserProfile/SetSessionVar", { variable = "NavState" }, function () { });
    </script>

    break;
default:
    break;
}

<script type="text/javascript">
$(document).ready(function ()
{
    Alert("here");
});
</script>

我尝试将$ .post更改为$ .ajax。没变化。

    <script type="text/javascript">
        function SetSessionVar() {
            $.ajax({
                type: "POST",
                url: "UserProfile/SetSessionVar",
                data: '{variable: "NavState"}',
                contentType: "application/json; charset=utf-8",
                dataType: "json"
            });
    </script>

控制器方式：

    public void SetSessionVar(string variable)
    {
        if (variable == "NavState")
        {
            Session["NavState"] = "x";
        }
    }

Bundle.config：

using System.Web.Optimization;

namespace GbngWebClient
{
public class BundleConfig
{
    public static void RegisterBundles(BundleCollection bundles)
    {
        bundles.Add(new ScriptBundle("~/bundles/jquery").Include(                                                                
                                     "~/Scripts/jquery-{version}.js"));

        bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(                                                                
                                     "~/Scripts/jquery.validate*"));

        bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(                                                                
                                     "~/Scripts/modernizr-*"));

        bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(                                                                
                                     "~/Scripts/bootstrap.js"));

        bundles.Add(new StyleBundle("~/Content/css").Include(                                                              
                                    "~/Content/bootstrap.css",                                                              
                                    "~/Content/site.css",                                                              
                                    "~/Content/validation.css"));
    }
}
}