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c#mvvmpostsharp

How to catch property changing using Postsharp?

I have a viewmodel that is tagged with [NotifyPropertyChanged]. The properties are of course bound on input controls, like textboxes. I need to know, that the model's property was changed because of an input.

How can I catch this event?

Solution

  • If a class decorated by NotifyPropertyChanged implements INotifyPropertyChanged directly, then PostSharp requires that there is a method with signature:

    void OnPropertyChanged(string propertyName)

    This method has to raise PropertyChanged event explicitly. Working example could look like this:

    [NotifyPropertyChanged]
public class OsModel : INotifyPropertyChanged
{
    public int P1 { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

    Additional information could be found here.