Hi I am having a weird problem, and am hoping someone can shed some light on it.

I am creating my first Umbraco application, I get the users location and determine the closest store location for them. I need to set this value in the session.

I am getting the location and storing it in the session, but then when I go to access it, the session variable is gone.

In My layout:

<script type="text/javascript">
    var locID = 1;

    $(document).ready(function () {
        $.ajax({
            url: '@Url.Action("GetLocation", "Home", null)',
            data: { lon: longitude, lat: latitude },
            async: false,
            success: function (result) {
                console.log(result);
                var parsedResult = JSON.parse(result);
                locID = parsedResult.LocationID;

                $.ajax({
                    url: '@Url.Action("SetLocationInSession", "Home", null)',
                    data: { locationID: locID },
                    async: false,
                    success: function () {
                        console.log("Location set in session");
                    },
                    error: function (data) {
                        console.log(data);
                    }
                });
            }
        });

        $(".search").click(function () {
            $.ajax({
                url: '@Url.Action("GetLocationInSession", "Home", null)',
                data: { key: "location" },
                async: false,
                success: function (result) {
                    var parsedResult = JSON.parse(result);
                    locID = parsedResult.LocationID;
                    $("#locationID").val(locID);
                },
                error: function (data) {
                    console.log(data);
                }
            });
        });
    });

The set session seems to work fine. In my controller (a surfaceController being rendered as a partial view on an Umbraco page if that matters) looks like this:

public ActionResult GetLocation(double lon, double lat)
    {
        GeoHelper geoHelper = new GeoHelper();

        Context _db = new Context();

        var locations = _db.Locations.ToList();

        var location = geoHelper.GetClosestLocation(lat, lon, locations);

        LocationViewModel closest = new LocationViewModel();
        closest.LocationID = location.LocationID;
        closest.Name = location.Name;
        closest.Longitude = location.Longitude;
        closest.Latitude = location.Latitude;

        JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
        string result = javaScriptSerializer.Serialize(closest);

        return Json(result, JsonRequestBehavior.AllowGet);
    }

    public ActionResult SetLocationInSession(int locationID)
    {
        //Session.SetDataInSession<int>("location", locationID);

        Session["location"] = locationID;

        return Json(locationID, JsonRequestBehavior.AllowGet);
    }

    public ActionResult GetLocationInSession(string key)
    {
        //int locationID = Session.GetDataFromSession<int>(key);

        int locationID = (int)Session["location"];

        Context _db = new Context();

        var location = _db.Locations.Find(locationID);

        JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
        string result = javaScriptSerializer.Serialize(location);

        return Json(result, JsonRequestBehavior.AllowGet);
    }

If I run the app locally with debugging I can see that in the SetLocationInSession seems to be executing fine. I hover over session, and it a key count of 1, and the the key is location, and the value is what I expect.

But then when it calls GetLocationInSession I get an object reference error. If I put a break point here, the Session object does not have any keys. Does Umbraco need to interact with the session differently than standard ASP.NET MVC, I have done similar things to this in non Umbraco applications and never had issues.

Thanks, Charlie