Using this DelegateCommand wich we bind to a button Command for instance (I always add CommandParameter in xaml too, (in order to work fine).
Now my layoutroot datacontext viewmodel has the following property:
private ObservableCollection
public ObservableCollection
{
get { return _sales; }
set
{
_sales= value;
NotifyPropertyChanged("Sales");
}
}
And now (in this case is a WPF application, in case you use SL I recommend you to use PagedViewCollection), I instance the command in the constructor:
PaidCommand = new DelegateCommand()
{
ExecuteCommand = () =>
{
bw = new BackgroundWorker();
bw.RunWorkerCompleted += (s, e) =>
{
NotifyPropertyChanged("Sales"); //#1
};
bw.DoWork += (s1, e1) =>
{
_sales= DM.GetSales(_date1, _date2); //#2
};
bw.RunWorkerAsync();
}
};
In #2 we process every lines of code we want filling our private fields and when it's finished we publish
simply Notifying them #1 (In my case I have a datagrid with ItemsSource = {Binding Sales})
I hope it helps you (I like this way to do).
And now just a question if any one knows , for other classes I would like to define. Let's suppose a not MVVM environment
Button1.OnClick += (s,e) =>
{
...
};Do you know a way to remove inside the ... the previous delegates like the old way:
Button1.OnClick -= OnButton1Clicked;
