Question

I’ve got my Partial view :

@foreach (var checkbox in Model.TimeLimit)
{
    <div class="editor-label">
    @Html.Label(checkbox.Name)
    @Html.Hidden(checkbox.Id) 
    @Html.CheckBoxFor(c=>checkbox.IsChecked)
    </div>
}

I’ve got a ParentViewModel which contains :

public IEnumerable<URLTimeLimitViewModel> TimeLimit { get; set; }

and URlTimelimitViewmodel contains :

public string Name { get; set; }
public int Id { get; set; }
public bool IsChecked { get; set; }

When I call submit button, Timelimit in ParentViewModel returns null, why?

Answer 1

You need to change your loop – the model binder cannot figure out what to bind the posted values to:

@for (var i = 0; i < Model.TimeLimit.Count; i++)
{
  <div class="editor-label">
    @Html.Label(Model.TimeLimit[i].Name)
    @Html.Hidden(Model.TimeLimit[i].Id) 
    @Html.CheckBoxFor(c=>Model.TimeLimit[i].IsChecked)
  </div>
}

You’ll also need to declare your TimeLimit property as something other than an IEnumerable, I’d recommend a generic List (LINQs ToList method is very convenient!):

public List<URlTimelimitViewModel> TimeLimit { get; set; }