How to set initial value for extra filter?

I have set extra filter for my object.
It work ok.
But the default value for filter is 'no set', so all objects will load .
I want set initial value for extra filter, such as from '2017-01-01' to '2017-03-31, so only a part objects would load in first time.
I set the initial value in the view controller, but it does not work.please see 01.png. o2.png.
some code as fllow. But it does not work.
please tell me how to set initial value for extra filter?
solution5.rar is my solution.
protected override void OnActivated()
{
base.OnActivated();
// Perform various tasks depending on the target View.

var controller = this.Frame.GetController();
if (controller == null) return;
var action = (Xafari.Actions.PopupContainerShowAction)controller.Actions["PeriodFilterAction"];
if (action == null) return;

action.Value = new PeriodStruct
{
Start = DateTime.Parse("2017-01-01"),
End = DateTime.Parse("2017-12-31")
};