Asp.net MVC View Textbox Returns Default Value - asp.net-mvc

Question

I can send lat,lon, neighbors and neighborslimit variables to View.Yet, I want change neighborlimit from view. When I post View, MapViewModel's variables are 0, I have tried to ModelState.Clear() but there is no difference, Could you help me about it ? Thanks
MODEL:
public class MapViewModel
{
public double lat;
public double lon;
public List<Point> neighbors;
public Polygon polygon;
public int neighborlimit;
public double[][] polyTable;
}
CONTROLLER:
[HttpGet]
public ActionResult Map()
{
UserAccount user = (UserAccount)UserManager.FindByName(User.Identity.Name);
MapViewModel model = new MapViewModel() { lat = (double)user.address.latitude, lon = (double)user.address.longitude, neighbors = user.getNeighbors(), neighborlimit= (int)user.neighborsLimit };
return View(model);
}
[HttpPost]
public ActionResult Map(MapViewModel model)
{
UserAccount user = (UserAccount)UserManager.FindByName(User.Identity.Name);
user.neighborsLimit = model.neighborlimit;
UserManager.Update(user);
return View(model);
}
VIEW:
#using (Html.BeginForm())
{
#Html.AntiForgeryToken()
<div class="form-group">
<div class="col-md-10">
#Html.TextBoxFor(h => h.neighborlimit, new { #class = "form-control" })
</div>
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Log in" class="btn btn-default" />
</div>
</div>
}

Answer 1

You don't have a property for neighborlimit (just a field). Change it to
public int neighborlimit { get; set; }
which will allow the DefaultModelBinder to set the property when you submit the form

Answer 2

The problem is that you don't have the values in the form that's why when the form is posted the values doesn't exists and the ModelBinder set default values. If the security is not a problem but hidden fields for all values that you want to persist.
Something like this
#using (Html.BeginForm())
{
#Html.AntiForgeryToken()
#Html.HiddenFor(h => h.lat)
/* Now enter hidden fields for all of the properties that you want */
<div class="form-group">
<div class="col-md-10">
#Html.TextBoxFor(h => h.neighborlimit, new { #class = "form-control" })
</div>
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Log in" class="btn btn-default" />
</div>
</div>
}
UPDATE
As Stephen Muecke said make sure that you use properties not fields