how to fill in combobox dynamically with caliburn micro? - caliburn.micro

Question

I am new to MVVM and Caliburn.Micro.
I am trying to do a simple application using Caliburn.Micro that has a combobox.
The combobox items are added dynamically when the program is running, the problem is that the combobox stops updating its content after the first item navigation.
In View:
The combobox is declared as follows:
<ComboBox x:Name="cmbProductList" />
In ViewModel:
I declare the following list for combobox items:
List<string> L = new List<string> { };
I am using the following method to fill combobox item:
public List<string> cmbProductList
{
get
{
return L;
}
set
{
L = value;
NotifyOfPropertyChange("cmbProductList");
}
}
And this command to add an item to this list:
L.Add(p1.ID.ToString());

Answer 1

The container you are using for your combobox items is not the proper one. List has no way of notifying the UI of its changes (items added or removed). Instead you need to use an ObservableCollection. Or even better, you can use BindableCollection that is Caliburn.Micro's customized version of ObservableCollection:
BindableCollection is a simple collection that inherits from ObservableCollection, but that ensures that all its events are raised on the UI thread as well.
http://caliburnmicro.com/documentation/introduction
Your property would look like this:
private BindableCollection<string> _cmbProductList;
public BindableCollection<string> cmbProductList
{
get
{
return _cmbProductList;
}
set
{
_cmbProductList = value;
NotifyOfPropertyChange("cmbProductList");
}
}
and of course its initialization would look like this:
_cmbProductList = new BindableCollection<string>();
The rest can stay unchanged.