29-12-2015 15:14:54 C# / WPF 0 Bookmark(s) 245 View(s)

 

public class ViewModelBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual bool ChangeAndNotify<T>(T value, ref T field, [CallerMemberName] string propertyName = null)
    {
        var hasChanged = Equals(value, field);

        if (hasChanged)
        {
            Notify(propertyName);    
        }
        
        return hasChanged;
    }

    [NotifyPropertyChangedInvocator]
    protected virtual void Notify([CallerMemberName] string propertyName = null)
    {
        var handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}